| Andrew Bacon | 12-12-2003 01:00 PM |
[QUOTE][i]Originally posted by johnfelstead [/i]
[B].......You will have to slacken and reposition the steering knuckle joint to allow the rack to drop down too....[/B][/QUOTE]
I'll try the 22mm front bar and lowering the rack, thanks for the tip.
How do I slacken and reposition the steering knuckle joint? Will it be evident once I get in there? Will I have to re-align the front afterwards? I have replaced the rubber rack bushings with poly ones, so I'm not totally incompetent. :D
[B].......You will have to slacken and reposition the steering knuckle joint to allow the rack to drop down too....[/B][/QUOTE]
I'll try the 22mm front bar and lowering the rack, thanks for the tip.
How do I slacken and reposition the steering knuckle joint? Will it be evident once I get in there? Will I have to re-align the front afterwards? I have replaced the rubber rack bushings with poly ones, so I'm not totally incompetent. :D
| johnfelstead | 12-12-2003 05:38 PM |
[QUOTE][i]Originally posted by makofoto [/i]
[B]John ... what's your general opinion of adding a bit (1/16th inch) of toe out on a WRX ... minus 1 degree camber all around. I'm going to start doing a bit of AutoX'ing again.
Certainly seems to help make the turn in faster! [/B][/QUOTE]
At the rear, dont do it, unless you can change toe at the event and put it back to toe in afterwards. Toe out at the rear is a disaster for precision and stability, especially at speed.
At the front it will make the car more darty and unstable, but it can improve turn in. It's commonly used on single seater race cars. Front toe out gives you the effect of putting the inside wheel into a sharper angle than the outer wheel during the turn, so the inside wheel doesnt scrub as much, follows the natural arc of the corner better and provides more usable grip than toe in, but under heavy braking the car has a tendency to wander.
Suspension is all about compromises and where you want the car to work most eficiently, toe out at a track like the nurburgring which is very high speed and bumpy would be frightening to drive, somewhere that is silky smooth and has lots of tight slow corners it would be worth trying.
[B]John ... what's your general opinion of adding a bit (1/16th inch) of toe out on a WRX ... minus 1 degree camber all around. I'm going to start doing a bit of AutoX'ing again.
Certainly seems to help make the turn in faster! [/B][/QUOTE]
At the rear, dont do it, unless you can change toe at the event and put it back to toe in afterwards. Toe out at the rear is a disaster for precision and stability, especially at speed.
At the front it will make the car more darty and unstable, but it can improve turn in. It's commonly used on single seater race cars. Front toe out gives you the effect of putting the inside wheel into a sharper angle than the outer wheel during the turn, so the inside wheel doesnt scrub as much, follows the natural arc of the corner better and provides more usable grip than toe in, but under heavy braking the car has a tendency to wander.
Suspension is all about compromises and where you want the car to work most eficiently, toe out at a track like the nurburgring which is very high speed and bumpy would be frightening to drive, somewhere that is silky smooth and has lots of tight slow corners it would be worth trying.
| Mako | 12-12-2003 05:38 PM |
Does anyone know of good film of a 2003 or newer STi doing the Ring competently? I dig the old ones but I'd like to see a new one tearing it up as well.
| johnfelstead | 12-12-2003 05:43 PM |
[QUOTE][i]Originally posted by Andrew Bacon [/i]
[B]How do I slacken and reposition the steering knuckle joint? Will it be evident once I get in there? Will I have to re-align the front afterwards? [/B][/QUOTE]
Its easy, just slacken the 2 bolts that clamp it to the rack and steering column and let it find its new position, then tighten back up.
Yes, you will need to realign the front.
[B]How do I slacken and reposition the steering knuckle joint? Will it be evident once I get in there? Will I have to re-align the front afterwards? [/B][/QUOTE]
Its easy, just slacken the 2 bolts that clamp it to the rack and steering column and let it find its new position, then tighten back up.
Yes, you will need to realign the front.
| TyrannoSullyRex | 12-12-2003 06:01 PM |
[QUOTE][i]Originally posted by johnfelstead[/i]
[B] At the rear, dont do it, unless you can change toe at the event and put it back to toe in afterwards. Toe out at the rear is a disaster for precision and stability, especially at speed.
At the front it will make the car more darty and unstable, but it can improve turn in. It's commonly used on single seater race cars. Front toe out gives you the effect of putting the inside wheel into a sharper angle than the outer wheel during the turn, so the inside wheel doesnt scrub as much, follows the natural arc of the corner better and provides more usable grip than toe in, but under heavy braking the car has a tendency to wander.
Suspension is all about compromises and where you want the car to work most eficiently, toe out at a track like the nurburgring which is very high speed and bumpy would be frightening to drive, somewhere that is silky smooth and has lots of tight slow corners it would be worth trying. [/B][/QUOTE]
No kidding on all that, I run a good bit of toe out all the way around for autocross but for driving down the highway it's a darty sumbitch. In an autocross my car will change directions extremely well, but it's uncomfortable for daily driving.
[B] At the rear, dont do it, unless you can change toe at the event and put it back to toe in afterwards. Toe out at the rear is a disaster for precision and stability, especially at speed.
At the front it will make the car more darty and unstable, but it can improve turn in. It's commonly used on single seater race cars. Front toe out gives you the effect of putting the inside wheel into a sharper angle than the outer wheel during the turn, so the inside wheel doesnt scrub as much, follows the natural arc of the corner better and provides more usable grip than toe in, but under heavy braking the car has a tendency to wander.
Suspension is all about compromises and where you want the car to work most eficiently, toe out at a track like the nurburgring which is very high speed and bumpy would be frightening to drive, somewhere that is silky smooth and has lots of tight slow corners it would be worth trying. [/B][/QUOTE]
No kidding on all that, I run a good bit of toe out all the way around for autocross but for driving down the highway it's a darty sumbitch. In an autocross my car will change directions extremely well, but it's uncomfortable for daily driving.
| johnfelstead | 12-12-2003 06:13 PM |
[QUOTE][i]Originally posted by Mako [/i]
[B]Does anyone know of good film of a 2003 or newer STi doing the Ring competently? I dig the old ones but I'd like to see a new one tearing it up as well. [/B][/QUOTE]
[URL=http://www.litchfieldimports.co.uk/subaru/specc.wmv]Spec C at the ring [/URL]
[B]Does anyone know of good film of a 2003 or newer STi doing the Ring competently? I dig the old ones but I'd like to see a new one tearing it up as well. [/B][/QUOTE]
[URL=http://www.litchfieldimports.co.uk/subaru/specc.wmv]Spec C at the ring [/URL]
| TRM | 12-12-2003 09:05 PM |
very cool...looks like fun.
thanks for sharing.
:)
[URL=http://www.velozt.com/]velozt.com - all wheel drive baby![/URL]
[URL=http://www.wrxclub.org/]wrxclub.org[/URL]
thanks for sharing.
:)
[URL=http://www.velozt.com/]velozt.com - all wheel drive baby![/URL]
[URL=http://www.wrxclub.org/]wrxclub.org[/URL]
| Turbogeek | 12-12-2003 11:42 PM |
Damn, this is one hell of a thread. I've done in about 1/2 Gig of disk in downloads. Awesome stuff. Makes the videos of my VR-4 look weak and pissy
| Andrew Bacon | 12-13-2003 04:11 AM |
John, you rock.
| makofoto | 12-13-2003 01:30 PM |
I'm running 1/16th inch toe out ... just in front ... and since it makes it "easier" for my WRX to turn ... it feels livelier.
Now what's the difference between that ... and the fast steering on the EVO 8 that "everyone" raves about? It's fast steering supposedly contributes to it being easier to drive at the limit. Of course it also makes it not as easy to drive as a daily driver.
My 1/16th inch just nudges me into feeling a bit livelier ... the car still basically ends up with a understeer bias, etc.
So, since we have a car with a sporting nature ... and we accept compromises (tire wear, harshness) that give us what comes with a sporty car ... why do so few alignment specs for the WRX contain a bit of front toe out.
Now what's the difference between that ... and the fast steering on the EVO 8 that "everyone" raves about? It's fast steering supposedly contributes to it being easier to drive at the limit. Of course it also makes it not as easy to drive as a daily driver.
My 1/16th inch just nudges me into feeling a bit livelier ... the car still basically ends up with a understeer bias, etc.
So, since we have a car with a sporting nature ... and we accept compromises (tire wear, harshness) that give us what comes with a sporty car ... why do so few alignment specs for the WRX contain a bit of front toe out.
| DJ 9iron | 12-13-2003 02:26 PM |
[QUOTE][i]Originally posted by johnfelstead[/i]
[B] [URL=http://www.litchfieldimports.co.uk/subaru/specc.wmv]Spec C at the ring [/URL] [/B][/QUOTE]
WOW! That was a scary ride!:eek:
[B] [URL=http://www.litchfieldimports.co.uk/subaru/specc.wmv]Spec C at the ring [/URL] [/B][/QUOTE]
WOW! That was a scary ride!:eek:
| makofoto | 12-13-2003 02:39 PM |
:( The Spec C video won't open ... even if I download it to my desktop first ... and I have the latest version of Windows Media Player ... :mad:
| Andrew Bacon | 12-13-2003 02:47 PM |
[QUOTE][i]Originally posted by makofoto [/i]
[B]......what's the difference between that ... and the fast steering on the EVO 8 that "everyone" raves about?....[/B][/QUOTE]
Mako-
Our cars have 3.x turns lock to lock, the Evo has 2.x turns lock to lock. Makes a world of difference. Good luck at the A-X this weekend! -Andy
[B]......what's the difference between that ... and the fast steering on the EVO 8 that "everyone" raves about?....[/B][/QUOTE]
Mako-
Our cars have 3.x turns lock to lock, the Evo has 2.x turns lock to lock. Makes a world of difference. Good luck at the A-X this weekend! -Andy
| afpdl | 12-13-2003 02:58 PM |
[QUOTE][i]Originally posted by Andrew Bacon[/i]
[B] Mako-
Our cars have 3.x turns lock to lock, the Evo has 2.x turns lock to lock. Makes a world of difference. Good luck at the A-X this weekend! -Andy [/B][/QUOTE]
I think he means what is the difference in the compromises to daily driving between a quick ratio, and a little bit of front toe out because they can both make the car twitchy, but both make the car turn in with less effort.
[B] Mako-
Our cars have 3.x turns lock to lock, the Evo has 2.x turns lock to lock. Makes a world of difference. Good luck at the A-X this weekend! -Andy [/B][/QUOTE]
I think he means what is the difference in the compromises to daily driving between a quick ratio, and a little bit of front toe out because they can both make the car twitchy, but both make the car turn in with less effort.
| johnfelstead | 12-13-2003 08:53 PM |
[QUOTE][i]Originally posted by makofoto [/i]
[B]why do so few alignment specs for the WRX contain a bit of front toe out. [/B][/QUOTE]
Because its less stable than toe in, and in the vast majority of road driving sceanrios would put mr average into a worse state that if they had the car setup for sharp turnin.
All suspension tuning is a compromise, and cars like the WRX are actually quite poor in terms of dynamics, they are setup to cater for the worst case senario of a not very skilled driver.
There is a huge amount more to chassis dynamics than toe and camber, transmition design has a big part to play, and with a 50:50 torque split the WRX has a natural tendency to understeer. The STi is much better in this respect being more balanced with a 65R:35F torque split.
Steering rack ratio improvements make your life easier, but they dont make any diference to the way the car reacts to inputs, they just make the drivers job easier by limiting the amount of travel you need to make on the wheel to get a reaction.
The driver of the spec C is pushing the car with no mechanical sympathy at all, he is pretty brutal with it, he wouldnt get a go in my car. :lol: He also has a really horible style on the steering wheel, shifting his hands around rather than keeping them in one place, there are times when he cant have a clue what the tyres are doing as he changes hand location mid corner, he is also killing the front tyres. It seems efective enough over one lap but that car would be knackered in no time if it was driven like that for any length of time. Still fun to watch. They cheat on the stopwatch too, the start and finish points are the length of the T13 straight apart, naughty boys. :D:lol:
[B]why do so few alignment specs for the WRX contain a bit of front toe out. [/B][/QUOTE]
Because its less stable than toe in, and in the vast majority of road driving sceanrios would put mr average into a worse state that if they had the car setup for sharp turnin.
All suspension tuning is a compromise, and cars like the WRX are actually quite poor in terms of dynamics, they are setup to cater for the worst case senario of a not very skilled driver.
There is a huge amount more to chassis dynamics than toe and camber, transmition design has a big part to play, and with a 50:50 torque split the WRX has a natural tendency to understeer. The STi is much better in this respect being more balanced with a 65R:35F torque split.
Steering rack ratio improvements make your life easier, but they dont make any diference to the way the car reacts to inputs, they just make the drivers job easier by limiting the amount of travel you need to make on the wheel to get a reaction.
The driver of the spec C is pushing the car with no mechanical sympathy at all, he is pretty brutal with it, he wouldnt get a go in my car. :lol: He also has a really horible style on the steering wheel, shifting his hands around rather than keeping them in one place, there are times when he cant have a clue what the tyres are doing as he changes hand location mid corner, he is also killing the front tyres. It seems efective enough over one lap but that car would be knackered in no time if it was driven like that for any length of time. Still fun to watch. They cheat on the stopwatch too, the start and finish points are the length of the T13 straight apart, naughty boys. :D:lol:
| mlambert | 12-13-2003 09:03 PM |
The video was entertaining to watch and I'm always looking for more, but it made me cringe in more than a few spots. I was actually waiting for him to wreck.
| Andrew Bacon | 12-14-2003 12:00 AM |
Funny when he hammered the rumble strip and the in-car mic (it sounds like) fell off its mount.
I did notice the tires squeeled a lot more and longer in that spec C run than John's do in his RA. Also, in that one long straight when he got it into top gear, either he wasn't going for high top speed or the motor ran out of steam. Not likely the latter? I can't see his feet or the cluster, so I couldn't tell.
I did notice the tires squeeled a lot more and longer in that spec C run than John's do in his RA. Also, in that one long straight when he got it into top gear, either he wasn't going for high top speed or the motor ran out of steam. Not likely the latter? I can't see his feet or the cluster, so I couldn't tell.
| johnfelstead | 12-14-2003 02:20 AM |
In top gear it looks like you arent accelerating that hard but you dont always realise how high the speeds are at the ring on those flat out sections, you are hitting 150MPH in a few places and 300BHP hits a bit of a brick wall in terms of gaining speed in such high drag conditions.
Elevation change plays a major role in the way the speed increases too, far more than at any other circuit. On the section from flugplatz to schwedencraux where i am hitting 150MPH its a very steep drop and doesnt take too long to gain high speed. The same aplies on the plumet down into the foxhole, the acceleration there is immense.
I think the part you mean is the section just after bergwerk where you take a righthander and then head off through some very long sweeping left handers at Kesselchen onto a straight bumpy section before a slight lift for a left then right, heading towards the Karousel, that is a very steep sustained climb of 16%, the steepest section on the circuit, the elevation doesnt show too well on the videos but if you look at the diagram below it becomes more obvious.
[img]http://www.btinternet.com/~john.felstead/scoobynet/nurburgalt.JPG[/img]
Elevation change plays a major role in the way the speed increases too, far more than at any other circuit. On the section from flugplatz to schwedencraux where i am hitting 150MPH its a very steep drop and doesnt take too long to gain high speed. The same aplies on the plumet down into the foxhole, the acceleration there is immense.
I think the part you mean is the section just after bergwerk where you take a righthander and then head off through some very long sweeping left handers at Kesselchen onto a straight bumpy section before a slight lift for a left then right, heading towards the Karousel, that is a very steep sustained climb of 16%, the steepest section on the circuit, the elevation doesnt show too well on the videos but if you look at the diagram below it becomes more obvious.
[img]http://www.btinternet.com/~john.felstead/scoobynet/nurburgalt.JPG[/img]
| exhacker | 12-14-2003 07:35 AM |
On your car, the STi RA, what are the characteristics of the LSDs?... I'm guessing the front is 1-way helical, the rear is 1.5 clutch, and the center is 2-way electronic/viscous? I was hoping you could enlighten us there. I know you can "open" the diffs and smoke the rears, so you must have a non-viscous rear LSD. That's about all I can figure.
Thanks for the smooth in-cars, and the informative commentary.
-x
Thanks for the smooth in-cars, and the informative commentary.
-x
| dorikin | 12-14-2003 12:51 PM |
[quote]
300BHP hits a bit of a brick wall in terms of gaining speed in such high drag conditions.
[/quote]
D= (Cd)(rho)(V[b]^2[/b])/2
time to get the wax out ;)
300BHP hits a bit of a brick wall in terms of gaining speed in such high drag conditions.
[/quote]
D= (Cd)(rho)(V[b]^2[/b])/2
time to get the wax out ;)
| johnfelstead | 12-14-2003 08:50 PM |
Rear diff is a plated LSD, front is a mechanical gear type LSD, centre diff is a magnetically controlled clutch pack LSD that is variable from 0% lock through to 100% locked, adjustable via an electronic controller set via a potentiometer on the centre console. There are no Viscous couplings in the system.
I run the centre diff in 0% lock most of the time in the dry and alter the lock ratio depending on how slippy the conditions are in the wet. Torque split is 65% rear 35% front.
I run the centre diff in 0% lock most of the time in the dry and alter the lock ratio depending on how slippy the conditions are in the wet. Torque split is 65% rear 35% front.
| exhacker | 12-15-2003 06:00 PM |
[QUOTE][i]Originally posted by johnfelstead [/i]
[B]Torque split is 65% rear 35% front. [/B][/QUOTE]
Thanks for the info. That's very different from our USDM 2004 WRX STi, where I believe the F/R bias can be driver-selected.
[B]Torque split is 65% rear 35% front. [/B][/QUOTE]
Thanks for the info. That's very different from our USDM 2004 WRX STi, where I believe the F/R bias can be driver-selected.
| johnfelstead | 12-15-2003 06:13 PM |
No, the USDM STi has the same torque split and basic centre diferential design as my car. You are altering the lock percentage of the centre diff, not the inherant torque split.
| HoRo1 | 12-15-2003 07:48 PM |
[QUOTE][i]Originally posted by johnfelstead[/i]
[B] ... that is a very steep sustained climb of 16%, the steepest section on the circuit, the elevation doesnt show too well on the videos but if you look at the diagram below it becomes more obvious.
[/B][/QUOTE]
I found that the video shot looking to the rear is very effective at showing the elevation changes.
[COLOR=silver]United 3 City 1[/COLOR] :D
[B] ... that is a very steep sustained climb of 16%, the steepest section on the circuit, the elevation doesnt show too well on the videos but if you look at the diagram below it becomes more obvious.
[/B][/QUOTE]
I found that the video shot looking to the rear is very effective at showing the elevation changes.
[COLOR=silver]United 3 City 1[/COLOR] :D
| johnfelstead | 12-15-2003 08:04 PM |
yes, the rear view shows the elevation changes incredibly well.
[COLOR=blue]United 3 City 1[/COLOR] :furious:
[COLOR=blue]United 3 City 1[/COLOR] :furious:
| johnfelstead | 12-24-2003 01:47 PM |
20,000 views. :eek::D
Just to update on the video, things are all looking good, i am off down to London 29th/30th to spend a couple of days in the editing suite to get this finished then we should be into getting the videos produced for sale.
Just to update on the video, things are all looking good, i am off down to London 29th/30th to spend a couple of days in the editing suite to get this finished then we should be into getting the videos produced for sale.
| CoiloverKid | 12-24-2003 03:07 PM |
hey felstead, happy christmas! (none of this yank merry rubbish)
| johnfelstead | 12-25-2003 04:00 AM |
Thanks. Merry Christmas everyone. :D
| Andrew Bacon | 12-25-2003 04:01 AM |
Happy Festivis to everyone! Ugh.. *burp*
| johnfelstead | 12-28-2003 11:08 AM |
Here is a clip of me unwinding after a hard days spectating on this years WRC Rally Catalunya.
Every Christmas we have a Bond movie on TV, so the music is a bit festive for us here in the UK. ;) Hope you find it fun. :D
[URL=http://www.btinternet.com/~john.felstead/scoobynet/CatalunyaDonut.mov]Unwinding in Catalunya[/URL]
Every Christmas we have a Bond movie on TV, so the music is a bit festive for us here in the UK. ;) Hope you find it fun. :D
[URL=http://www.btinternet.com/~john.felstead/scoobynet/CatalunyaDonut.mov]Unwinding in Catalunya[/URL]
| ChrisW | 12-28-2003 12:00 PM |
:lol:
| makofoto | 12-28-2003 12:47 PM |
oh that's how you rack up so many miles so quickly ... :lol:
| GravelRash | 12-31-2003 04:25 PM |
Best wishes for a happy new year to all, and for the continued life of this thread :banana:
| johnfelstead | 12-31-2003 04:47 PM |
Just made it home from a few days in London working on the video, we are almost there now. :D There is so much work involved in doing this properly but it is worth the effort. It's looking like a few weeks away from being finished so i'll keep you up to date with that but we broke the camels back, especially on a funky feature i have not seen done before. ;)
Happy new year for 2004!!
Happy new year for 2004!!
| Andrew Bacon | 12-31-2003 04:54 PM |
HNY everyone! Wohooo!
| makofoto | 12-31-2003 05:05 PM |
Are you taking Pre-Orders .... ;)
I wish all of you motor sports Fans ... a Healthy, Happy & Prosperous NEW YEARS!
I believe Speed Channel is devoting all of the 1st to Rallying ....
I wish all of you motor sports Fans ... a Healthy, Happy & Prosperous NEW YEARS!
I believe Speed Channel is devoting all of the 1st to Rallying ....
| Andrew Bacon | 12-31-2003 05:07 PM |
[QUOTE][i]Originally posted by makofoto [/i]
[B]....I believe Speed Channel is devoting all of the 1st to Rallying .... [/B][/QUOTE]
Yep, the whole 2003 WRC season! Forget Parade n' Football, wes gots Rally! Weee!
[B]....I believe Speed Channel is devoting all of the 1st to Rallying .... [/B][/QUOTE]
Yep, the whole 2003 WRC season! Forget Parade n' Football, wes gots Rally! Weee!
| johnfelstead | 01-02-2004 07:18 PM |
Hi Guys, i posted a question in OT about the format used to produce this video, i would apreciate you letting me know your thoughts. [url]http://forums.nasioc.com/forums/showthread.php?s=&threadid=477785[/url]
I wont take any pre-orders, ;) but you will get these as soon as i can make them available. :D
I wont take any pre-orders, ;) but you will get these as soon as i can make them available. :D
| WRXpkr | 01-03-2004 02:41 PM |
Best Thread Evar! :D
Thank You John!
Ill be keeping an eye out for the full featured film!
Rock!
Trent
Thank You John!
Ill be keeping an eye out for the full featured film!
Rock!
Trent
| Andrew Bacon | 01-03-2004 05:10 PM |
[QUOTE][i]Originally posted by johnfelstead [/i]
[B]Hi Guys, i posted a question in OT about the format used to produce this video, i would apreciate you letting me know your thoughts. [url]http://forums.nasioc.com/forums/showthread.php?s=&threadid=477785[/url]
I wont take any pre-orders, ;) but you will get these as soon as i can make them available. :D [/B][/QUOTE]
We need NTSC over here in the states; PAL or SECAM won't play on our home consumer hardware.
[B]Hi Guys, i posted a question in OT about the format used to produce this video, i would apreciate you letting me know your thoughts. [url]http://forums.nasioc.com/forums/showthread.php?s=&threadid=477785[/url]
I wont take any pre-orders, ;) but you will get these as soon as i can make them available. :D [/B][/QUOTE]
We need NTSC over here in the states; PAL or SECAM won't play on our home consumer hardware.
| johnfelstead | 01-03-2004 05:21 PM |
Yep. i know Andrew. Thanks.
| jmh | 01-16-2004 11:19 PM |
Hi John, I hope all is going well with the video production, or at least as well as can be expected.In the mean time, you mentioned your going with the Leda suspension setup. How has it held up for you? Thanks for your efforts and replys. :)
Cheers
Cheers
| johnfelstead | 01-17-2004 08:34 AM |
Hi jmh,
The video is coming along well, i am busy working on the final graphics that will suplement the footage, diesel has finished the intro and first major lap which incorporates a lot of track information. The first lap takes the longest to build because we have to create all the various layers of information and sync those to the footage. It's giving the AVID production suite a real hammering. :D
What we are doing is giving you more than footage of the circuit being driven quickly, we are designing this in a way that will teach you something about how to drive the circuit and provide you with a guide to the track you could learn something useable from should you be lucky enough to visit one day, whilst being entertaining at the same time.
We have the studio booked for Feb 7th/8th and all being well that will finish it off. It's taking longer than i anticipated but it's worth the effort.
I have been using Leda suspension for around 30,000 miles now, it's working really well, it still responds to setting changes just like it did when new. I am very impressed with it and think for road/trackday type use it's a great option. You can get a tiny rattle at the rear when its cold, but that goes as soon as you get some temperature into them and Leda have since made some changes to the design to eliminate this. They can revalve mine for £20 a shock to stop this but it really doesnt bother me enough to send the kit back. It's certainly stood up well to the work it has to do at the nurburgring, which in places is a very bumpy surface, i used to boil the fluid in my inverted strut STi5 suspension after 9 miles before installing the Leda. It's completely consistent throughout the lap now.
The video is coming along well, i am busy working on the final graphics that will suplement the footage, diesel has finished the intro and first major lap which incorporates a lot of track information. The first lap takes the longest to build because we have to create all the various layers of information and sync those to the footage. It's giving the AVID production suite a real hammering. :D
What we are doing is giving you more than footage of the circuit being driven quickly, we are designing this in a way that will teach you something about how to drive the circuit and provide you with a guide to the track you could learn something useable from should you be lucky enough to visit one day, whilst being entertaining at the same time.
We have the studio booked for Feb 7th/8th and all being well that will finish it off. It's taking longer than i anticipated but it's worth the effort.
I have been using Leda suspension for around 30,000 miles now, it's working really well, it still responds to setting changes just like it did when new. I am very impressed with it and think for road/trackday type use it's a great option. You can get a tiny rattle at the rear when its cold, but that goes as soon as you get some temperature into them and Leda have since made some changes to the design to eliminate this. They can revalve mine for £20 a shock to stop this but it really doesnt bother me enough to send the kit back. It's certainly stood up well to the work it has to do at the nurburgring, which in places is a very bumpy surface, i used to boil the fluid in my inverted strut STi5 suspension after 9 miles before installing the Leda. It's completely consistent throughout the lap now.
| makofoto | 01-17-2004 09:18 AM |
What have you heard vis a vis the new consumer ProDrive Active Suspension: [url]http://www.prodrive-usa.com/product_detail.asp?yid=219&cid=10&pid=76&s=[/url]
We are being told June delivery ... seems like it might be nice for the weekend warrior ... ?
Off to my AutoX ... :D
We are being told June delivery ... seems like it might be nice for the weekend warrior ... ?
Off to my AutoX ... :D
| johnfelstead | 01-17-2004 10:21 AM |
I have seen the press releases for that but dont know how it will perform yet, i suppose only prodrive/ohlins do. :D
Active suspension, certainly in race car aplications is all about keeping the optimum ride height and the relationship constant between front/rear. This improves aerodynamics and also keeps the suspension geometry within its best performant region. Conventional suspension allows the chasis to move away from its ideal configuration much more.
You will probably find that a large part of the workings of this system rely on conventional technologies, which is why they call it semi-active and not active. With the more fine tuning carried out in seperate valving chambers.
I could be wrong of course but that aproach would make sense to me, i would expect to use this to control only some of the frequency ranges of the damping electronically and use normal valving for other frequency ranges, efectively mimicking something like a 4 or 5 way adjustable damper as used on high end competition cars.
If you want to see how these multi valved dampers work, watch a WRC car land after a big jump, they dont bounce, they soak up the bump and sit flat instantly, thats the effect of low frequency damping being controlled seperately to high frequency. It's the reason modern F1 cars can kerb hop so much too, as they efectively have blow off valves for the low frequency inputs that allow the suspension to travel quickly in a one off big impact, yet still are able to control the high frequecies of the ridges of the kerbing.
Suspension is where the real technology and speed is these days, it would be great to understand it better.
If Prodrive are reading this, send me a set and i'll do some testing for you. Even better, fly me over to do a road test report. ;):D
Active suspension, certainly in race car aplications is all about keeping the optimum ride height and the relationship constant between front/rear. This improves aerodynamics and also keeps the suspension geometry within its best performant region. Conventional suspension allows the chasis to move away from its ideal configuration much more.
You will probably find that a large part of the workings of this system rely on conventional technologies, which is why they call it semi-active and not active. With the more fine tuning carried out in seperate valving chambers.
I could be wrong of course but that aproach would make sense to me, i would expect to use this to control only some of the frequency ranges of the damping electronically and use normal valving for other frequency ranges, efectively mimicking something like a 4 or 5 way adjustable damper as used on high end competition cars.
If you want to see how these multi valved dampers work, watch a WRC car land after a big jump, they dont bounce, they soak up the bump and sit flat instantly, thats the effect of low frequency damping being controlled seperately to high frequency. It's the reason modern F1 cars can kerb hop so much too, as they efectively have blow off valves for the low frequency inputs that allow the suspension to travel quickly in a one off big impact, yet still are able to control the high frequecies of the ridges of the kerbing.
Suspension is where the real technology and speed is these days, it would be great to understand it better.
If Prodrive are reading this, send me a set and i'll do some testing for you. Even better, fly me over to do a road test report. ;):D
| PJ2.5RS | 01-17-2004 09:06 PM |
"" It costs about $12 a lap""
ok, I must be missing something here. It only costs $12 to do a full lap!?!
It costs more here in the US just to be a spectator at a drag race!! grrrr....
O yah, you can prob. host it on this site:
[url]http://www.8200rpm.com/index.php?p=1&t=3&lang=en[/url]
...and you thought 80mb was big!
ok, I must be missing something here. It only costs $12 to do a full lap!?!
It costs more here in the US just to be a spectator at a drag race!! grrrr....
O yah, you can prob. host it on this site:
[url]http://www.8200rpm.com/index.php?p=1&t=3&lang=en[/url]
...and you thought 80mb was big!
| johnfelstead | 01-17-2004 09:22 PM |
Host what there?
| SAW | 01-18-2004 12:58 AM |
OT---- "My Summer Vacation"
I watched the videos posted in this thread before I went on vacation to Germany this summer. They were awesome, but I found myself with the time to go to the Ring and drive it myself. I can't find words to describe how cool it was.
I rented a MB E320 for the vacation and the one I got had 42km on the clock. I turned it in with 3200km!
I took my rental to the Nurburgring and drove 2 laps. Admission to the museum and 2 laps cost something like $30US. I couldn't believe it.
I was on the track with tons of motorcycles, varying degrees of prepped 911s, BMW Z1, EVOs, Minis, vintage race Jaguar XK120, Lancia 037.
I was so slow!
The simple fact that I drove a Mercedes in the same "gully" that Fangio drove in 50 years ago is unbelieveable.
Near the end of my second lap I came upon a new MB SLK that was smashed up against the rail kinda brought me back down to earth.
It was incredible. After each lap I got out of my car and sat on the curb as while my overstressed brakes cooled down and I shook. It was part adrenaline, part fear, part excitement....
[B]Thanks John[/B] for the videos and giving me a little bit of courage and incentive to make the trip to the Ring.
Now, I had my vid cam attached to the passenger side window, but they made me take it down for safety reasons. That kinda sucked, but that was the only thing that was bad.
SAW
I watched the videos posted in this thread before I went on vacation to Germany this summer. They were awesome, but I found myself with the time to go to the Ring and drive it myself. I can't find words to describe how cool it was.
I rented a MB E320 for the vacation and the one I got had 42km on the clock. I turned it in with 3200km!
I took my rental to the Nurburgring and drove 2 laps. Admission to the museum and 2 laps cost something like $30US. I couldn't believe it.
I was on the track with tons of motorcycles, varying degrees of prepped 911s, BMW Z1, EVOs, Minis, vintage race Jaguar XK120, Lancia 037.
I was so slow!
The simple fact that I drove a Mercedes in the same "gully" that Fangio drove in 50 years ago is unbelieveable.
Near the end of my second lap I came upon a new MB SLK that was smashed up against the rail kinda brought me back down to earth.
It was incredible. After each lap I got out of my car and sat on the curb as while my overstressed brakes cooled down and I shook. It was part adrenaline, part fear, part excitement....
[B]Thanks John[/B] for the videos and giving me a little bit of courage and incentive to make the trip to the Ring.
Now, I had my vid cam attached to the passenger side window, but they made me take it down for safety reasons. That kinda sucked, but that was the only thing that was bad.
SAW
| tradeyell | 01-18-2004 07:05 AM |
see this: [url]http://f1.racing-live.com/photos/2003/barcelona/diapo_322.jpg[/url]
| johnfelstead | 01-18-2004 08:52 AM |
Sounds like a great trip SAW, it's a unique experience you really need to sample at least once to apreciate fully.
The reason you were asked to remove your camera was because Nurburgring GMBH has banned all filming at the track on public days.
The reason you were asked to remove your camera was because Nurburgring GMBH has banned all filming at the track on public days.
| johnfelstead | 01-20-2004 02:52 PM |
Just to keep you entertained a little longer ;) i have uploaded a very early lap of mine in the STi5 from after i had just bought the car. The car wasnt very happy. :D The dampers were shot and get worse as the lap progresses, the rear wheel bearing was rumbling (listen for it on left handers), the 4th gear syncro was caput, the front disks were warped too. It's before i made any changes to the car, it's even got the standard backbox on so you get to hear the engine screeming, at 8100rpm at one point. :D
It's got some funny moments during the lap, watch for the Porsche 968 driver giving someone the bird near the start for example. :D The audio editing i did shows why Diesel is doing my Video production on my VHS. :lol: Edited to remove some colourful language. :o
My passenger is the driver of the black car i pass just after adenaur forst on my helmetcam lap, he has driven 3 times as many laps as me........in a Skoda! :D
Hope you find it fun.
[url=http://www.johnfelstead.co.uk/videos/STi5TypeRAearly.mpg]Early days in the STi[/url]
It's got some funny moments during the lap, watch for the Porsche 968 driver giving someone the bird near the start for example. :D The audio editing i did shows why Diesel is doing my Video production on my VHS. :lol: Edited to remove some colourful language. :o
My passenger is the driver of the black car i pass just after adenaur forst on my helmetcam lap, he has driven 3 times as many laps as me........in a Skoda! :D
Hope you find it fun.
[url=http://www.johnfelstead.co.uk/videos/STi5TypeRAearly.mpg]Early days in the STi[/url]
| Lafora | 01-20-2004 04:38 PM |
your videos are the bomb john :D
what was that at the 7 minute mark :lol:
thanks again for the vid
what was that at the 7 minute mark :lol:
thanks again for the vid
| johnfelstead | 01-20-2004 05:20 PM |
That was where the guy in the Renault 2 seater was indicating to let me pass yet kept his foot in as i pulled alongside, it was a bit stupid coming up to some tight corners, so i said a few words not for general consumption. :D:lol: My editing skills suck. :D
Top tip for safe track driving, if someone is faster, indicate and then back off just a little so they can pass easily, dont sit there with your foot to the floor wondering why they arnt passed yet. :eek::disco:
Top tip for safe track driving, if someone is faster, indicate and then back off just a little so they can pass easily, dont sit there with your foot to the floor wondering why they arnt passed yet. :eek::disco:
| Gethin | 01-20-2004 05:53 PM |
[QUOTE][i]Originally posted by makofoto [/i]
[B]Of course Walther can be much faster in a GT3 ... but still, his time ... and the reactions that his passanger had ... just go to show how great your car is ... being able to achieve that time. The Scuby driver probably helped a bit also. It would seem your passangers should be even more thrilled ... but perhaps your smoothness takes off the edge ... ;)
I got driven around the Paul Ricard track in France by Didrie Pironi ... the french Ferrari driver ... shortly before he was killed at Hockenheim ... in a stock Renault sedan ... what was impressive was how smooth he was at speed ... throwing this sedan sideways at the end of the old long back straight ... to demonstrate how great Michelin tires are ... flying over the curbs ... but all so relaxed and smooth. :D [/B][/QUOTE]
Didier Pironi was killed in a power boat accident. That Hockenheim practice lap accident badly injured his legs ending his career.
Superb videos John. I miss the roads back in Wales, driving my imported MY97 WRX.
[url]http://dyno.scoobynet.co.uk/jap/gethin_evans.htm[/url]
Shame the cars have become so lardy as you say!
Gethin.
[B]Of course Walther can be much faster in a GT3 ... but still, his time ... and the reactions that his passanger had ... just go to show how great your car is ... being able to achieve that time. The Scuby driver probably helped a bit also. It would seem your passangers should be even more thrilled ... but perhaps your smoothness takes off the edge ... ;)
I got driven around the Paul Ricard track in France by Didrie Pironi ... the french Ferrari driver ... shortly before he was killed at Hockenheim ... in a stock Renault sedan ... what was impressive was how smooth he was at speed ... throwing this sedan sideways at the end of the old long back straight ... to demonstrate how great Michelin tires are ... flying over the curbs ... but all so relaxed and smooth. :D [/B][/QUOTE]
Didier Pironi was killed in a power boat accident. That Hockenheim practice lap accident badly injured his legs ending his career.
Superb videos John. I miss the roads back in Wales, driving my imported MY97 WRX.
[url]http://dyno.scoobynet.co.uk/jap/gethin_evans.htm[/url]
Shame the cars have become so lardy as you say!
Gethin.
| johnfelstead | 01-20-2004 06:05 PM |
Funny, i miss the fantastic roads you have in BC, especially at this time of year. Plenty of snow to play in. :D
That was very respectable power for an Impreza back in 1999! :D
That was very respectable power for an Impreza back in 1999! :D
| Gethin | 01-20-2004 06:11 PM |
The sea to sky is a blast!!!
Will start to tweak the wagon this year........
Miss the brute force of the old car.
Gethin.
Will start to tweak the wagon this year........
Miss the brute force of the old car.
Gethin.
| Arnie | 01-20-2004 06:52 PM |
john, love your editing skills, music is hysterical...so out of place! That Porsche really took off there. Could you keep with him with your current setup?
| johnfelstead | 01-20-2004 07:26 PM |
yeh, piece of cake. I am one minute slower in that lap than my normal pace with the car handling correctly. I stayed with him for quite a while really, up until the point i had to slow for the coach. He is only just ahead of me as i come out of the last corner, probably made 5 seconds on me over the lap.
Music is funny in that context, one of the reasons why i chose that. It was originally going to be a squarking chicken but i couldnt work out how to do that. :lol:
Music is funny in that context, one of the reasons why i chose that. It was originally going to be a squarking chicken but i couldnt work out how to do that. :lol:
| jmh | 01-20-2004 08:02 PM |
Thanks for the laugh John, an englishman in Germany driving to spanish music,that's cultural diversity. :lol: Even with the car not sorted you hold your own.
cheers
Joe
cheers
Joe
| Arnie | 01-20-2004 09:14 PM |
that's so cool considering the ca. 100hp difference. I suppose the porsche weighs a bit more. and you can drive kinda good.
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