| V8VENOM | 05-18-2004 12:33 PM |
STI over 145 mph??
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I'm probably gonna run Fontana next year and having run there before in my old race car I know I can easily hit speeds over 150 mph. So, I need to know:
1. Why is the STI speed limited to 145 (about)? Hood scoop issue?
2. Without doing a custom chip burn can the speed limiter be fooled or disabled some other way?
Thanks, Rob.
1. Why is the STI speed limited to 145 (about)? Hood scoop issue?
2. Without doing a custom chip burn can the speed limiter be fooled or disabled some other way?
Thanks, Rob.
| Achilles38WRX | 05-18-2004 12:54 PM |
i thought it was limited to 145 because of its 'brick' style aerodynamics.
| Capt Crunch | 05-18-2004 01:27 PM |
[QUOTE][i]Originally posted by Achilles38WRX[/i]
[B] i thought it was limited to 145 because of its 'brick' style aerodynamics. [/B][/QUOTE]
At least it is slicker than the 02-03 'tissue box' aerodynamics.
[B] i thought it was limited to 145 because of its 'brick' style aerodynamics. [/B][/QUOTE]
At least it is slicker than the 02-03 'tissue box' aerodynamics.
| afpdl | 05-18-2004 01:37 PM |
[QUOTE][i]Originally posted by Achilles38WRX[/i]
[B] i thought it was limited to 145 because of its 'brick' style aerodynamics. [/B][/QUOTE]
nope its electronically limited.
Somthing was mentioned about the tranny overheating above 145mph awhile ago, but havent seen anything to confirm if thats true or the reason for the limit.
[B] i thought it was limited to 145 because of its 'brick' style aerodynamics. [/B][/QUOTE]
nope its electronically limited.
Somthing was mentioned about the tranny overheating above 145mph awhile ago, but havent seen anything to confirm if thats true or the reason for the limit.
| KoneKiller | 05-18-2004 01:50 PM |
Maybe the lawyers overheat at 145?
I'd be worried about lift, personally. The wing probably does a good deal for the rear, but what keeps the front on the ground?
I'd be worried about lift, personally. The wing probably does a good deal for the rear, but what keeps the front on the ground?
| makofoto | 05-18-2004 02:03 PM |
That what I thought those mini stubby front "spoiler" things were for ... I need to check out my latest German car magazine with their big STI Nurburgring test ... included a wind tunnel/smoke photo showing how the wings/aero's work ...
| wistful | 05-18-2004 02:19 PM |
that's why I bought me a V-limited front spoiler. :D
for the record though, its NOT due to aerodynamics. the car pulls hard all the way to the limiter. not.. that.. you know.. I know or anything.
Don
for the record though, its NOT due to aerodynamics. the car pulls hard all the way to the limiter. not.. that.. you know.. I know or anything.
Don
| 10th Warrior | 05-18-2004 04:01 PM |
what's the gearing good for?
| jmott | 05-18-2004 04:02 PM |
[QUOTE][i]Originally posted by 10th Warrior [/i]
[B]what's the gearing good for? [/B][/QUOTE]
multiplying torque
:lol:
[B]what's the gearing good for? [/B][/QUOTE]
multiplying torque
:lol:
| Prestige Motorsports | 05-18-2004 04:06 PM |
I have a customer who bought his STI, lightly modded it, then drove across the US in it. He called me from Texas raving about the stability of the car at over 150 mph. His Speedometer stopped going up at 158...his GPS tracked him at 156.8.
This is the only instance I personally know of where an STI owner has tried to find a speed limiter, but his car was equipped with a turbo back exhaust, a manual boost controller, and a panel filter.
Again, he raved about how the STI was more stable over 140 than his WRX was at 120.
Kent
This is the only instance I personally know of where an STI owner has tried to find a speed limiter, but his car was equipped with a turbo back exhaust, a manual boost controller, and a panel filter.
Again, he raved about how the STI was more stable over 140 than his WRX was at 120.
Kent
| V8VENOM | 05-18-2004 05:11 PM |
So nobody really knows? Dang!
Tranny overheating -- doesn't make sense to me -- plus why have a rear differential temp sensor if the tranny is the "hot spot".
V-limited front spoiler -- do you have any pics of this unit and exactly how it is connected to the car's frame and/or subframe? I'm a little dubious on the functionality of all the "aftermarket" kits I've seen so far -- aimed more at looks rather than real durable functionality. I like Gary S. custom front splitter, but that is apparently pretty heavy. A front splitter will certainly slow the car down (if it is really doing it's job) -- but I agree, it certainly is NOT the reason for holding at 145.
158+ hmmm... sure this person didn't have a custom chip burn? Anyone else have actual experience with their STI over 145?
Guess I'll just have to see what happens -- just very worried about my scoop/hood coming off.
Tranny overheating -- doesn't make sense to me -- plus why have a rear differential temp sensor if the tranny is the "hot spot".
V-limited front spoiler -- do you have any pics of this unit and exactly how it is connected to the car's frame and/or subframe? I'm a little dubious on the functionality of all the "aftermarket" kits I've seen so far -- aimed more at looks rather than real durable functionality. I like Gary S. custom front splitter, but that is apparently pretty heavy. A front splitter will certainly slow the car down (if it is really doing it's job) -- but I agree, it certainly is NOT the reason for holding at 145.
158+ hmmm... sure this person didn't have a custom chip burn? Anyone else have actual experience with their STI over 145?
Guess I'll just have to see what happens -- just very worried about my scoop/hood coming off.
| wistful | 05-18-2004 06:45 PM |
I don't have pix of its applicatino on MY car, but there's tons of pics floating around. just search in the member's gallery. SUPPOSEDLY, when combined with all the other aero equip on the car, it reduces the front end lift to exactly 0. Hey, its STi. Besides, it looks soo damn good.
Don
Don
| mofugga | 05-18-2004 09:00 PM |
i thought they were limited to 155?
| proliar | 05-18-2004 09:07 PM |
I have had a customer take his to 150+mph and he said he still had more power to go....he is a gear head and his partner that night vouches for it. so I, as a salesman, wish I had something to show a customer on "Top Speed"
Thanks Shawn
Thanks Shawn
| makofoto | 05-18-2004 10:03 PM |
The current issue of the german magazine Sport Auto has a test on the STI. It said that the top speed is "boost limited @ 6,200 RPM in Sixth gear in order to protect the gearbox from high operating temperature." Redline is 7,500 except in 6th ... Supposedly the Euro STI has a longer final ratio ... 3.55 ... then the US model? Top speed is limited to 152 mph - in order to protect the gearbox.
The rear wing is apparently so effective that it produces lift in the front by pushing the rear down (too) hard.
The rear wing is apparently so effective that it produces lift in the front by pushing the rear down (too) hard.
| ANZAC_1915 | 05-18-2004 10:56 PM |
The limiter is at 147 (150+ indicated).
It isn't anything to do with the gearbox or aerodynamics.
Glenn
It isn't anything to do with the gearbox or aerodynamics.
Glenn
| V8VENOM | 05-19-2004 02:14 AM |
Glenn,
Can you tell me what it IS rather than what it isn't -- I feel like I have to guess Door A, Door B, Door C ;)
By process of elimination I down to:
1. Tires (not a concern since I don't use stock tires at the track)
2. Wheel bearings (big concern)
3. Motor can't handle extended durations at high boost
4. Scoop/intercooler produces excessive air cooling and exceeds operational parameters of the ECU?
5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)
6. Very bad drivetrain harmonics above that speed
I was going to suggest front glass also, but that is very much part of the car's aerodynamics.
Rob.
Can you tell me what it IS rather than what it isn't -- I feel like I have to guess Door A, Door B, Door C ;)
By process of elimination I down to:
1. Tires (not a concern since I don't use stock tires at the track)
2. Wheel bearings (big concern)
3. Motor can't handle extended durations at high boost
4. Scoop/intercooler produces excessive air cooling and exceeds operational parameters of the ECU?
5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)
6. Very bad drivetrain harmonics above that speed
I was going to suggest front glass also, but that is very much part of the car's aerodynamics.
Rob.
| RallyCSX | 05-19-2004 05:26 AM |
Hit 150 on my speedo
closed course of course;)
closed course of course;)
| sdecker | 05-19-2004 07:52 AM |
145 definitely seems to be artificial and arbitrary. I have taken my lightly modded WRX up to 138 many times on the back straight at Road Atlanta. I could easily exceed that, given more room. I've had no issues at all with either the factory hood scoop or the STI replacement. There are quite a lot of fasteners and brackets holding that thing down.
Wish I could give you the specifics on the STI...sorry. Why don't you bring it down to Road Atlanta and let's test it out? :devil:
Scott
Wish I could give you the specifics on the STI...sorry. Why don't you bring it down to Road Atlanta and let's test it out? :devil:
Scott
| kfoote | 05-19-2004 10:21 AM |
[QUOTE][i]Originally posted by V8VENOM [/i]
[B]...5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)...[/B][/QUOTE]
I think this is the real answer. There are many cars that arificially limit top speed for various reasons. 147 MPH translates to almost exactly 225 kph, which makes sense for an arbitrarily chosen top speed.
[B]...5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)...[/B][/QUOTE]
I think this is the real answer. There are many cars that arificially limit top speed for various reasons. 147 MPH translates to almost exactly 225 kph, which makes sense for an arbitrarily chosen top speed.
| makofoto | 05-19-2004 11:14 AM |
In Germany ... where some of the cars ARE artificially top speed governed ... the magazine specifically pointed out that their STI was not restricted for "political" reasons ... but instead for "very practical reasons," ie. to avoid gearbox overheating. Don't forget that in Germany you can CRUISE at VERY high speeds. I remember my 1802 BMW (1971!) manual said that it's red line was 6,200 ... but for extended cruising, do not go above 6,000. :cool:
| Fitz | 05-19-2004 11:40 AM |
[QUOTE]Hit 150 on my speedo. Closed course of course[/QUOTE]
... on your way down to pick up a clutch slave cylinder and some bolts... :)
Fitz
... on your way down to pick up a clutch slave cylinder and some bolts... :)
Fitz
| ANZAC_1915 | 05-19-2004 08:19 PM |
[QUOTE][i]Originally posted by V8VENOM [/i]
[B]Glenn,
Can you tell me what it IS rather than what it isn't -- I feel like I have to guess Door A, Door B, Door C ;)
By process of elimination I down to:
1. Tires (not a concern since I don't use stock tires at the track)
2. Wheel bearings (big concern)
3. Motor can't handle extended durations at high boost
4. Scoop/intercooler produces excessive air cooling and exceeds operational parameters of the ECU?
5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)
6. Very bad drivetrain harmonics above that speed
I was going to suggest front glass also, but that is very much part of the car's aerodynamics.
Rob. [/B][/QUOTE]
You are getting warm with 2 & 6. To repeat I am not sure if the issue remains on the 05.
[B]Glenn,
Can you tell me what it IS rather than what it isn't -- I feel like I have to guess Door A, Door B, Door C ;)
By process of elimination I down to:
1. Tires (not a concern since I don't use stock tires at the track)
2. Wheel bearings (big concern)
3. Motor can't handle extended durations at high boost
4. Scoop/intercooler produces excessive air cooling and exceeds operational parameters of the ECU?
5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)
6. Very bad drivetrain harmonics above that speed
I was going to suggest front glass also, but that is very much part of the car's aerodynamics.
Rob. [/B][/QUOTE]
You are getting warm with 2 & 6. To repeat I am not sure if the issue remains on the 05.
| trojan9x | 05-19-2004 10:37 PM |
I've had my measely 2001 RS close to 130.. wish i had my GPS at the time to confirm it. This was at about 5500-5700 RPMs
And you think the 02-03 was tissue shaped.. :lol:
And you think the 02-03 was tissue shaped.. :lol:
| kennethw | 05-19-2004 10:44 PM |
I run a bugeye Euro STi and have brought it up to 250km/h or 150mph, car still has power to pull, but I don't have to balls to go any faster.
With regards to the gearbox, we usually cruise around 200km/h for about an hour along the highway and the gearbox seems to be cooler than driving in the city.
For front downforce, I have the C-West lower air damper which seems to work great.
With regards to the gearbox, we usually cruise around 200km/h for about an hour along the highway and the gearbox seems to be cooler than driving in the city.
For front downforce, I have the C-West lower air damper which seems to work great.
| Kuro | 05-20-2004 05:04 AM |
It's only a guess but I think it has a lot to do with the saftey standards in Canada. Over here, all factory cars are limited to ~150 mph so I'm pretty sure it's a factor when developing cars in the States.
| Irvine Subaru | 05-20-2004 02:25 PM |
A customer of mine said he hit some type of gov at 158mph in his STI as shown by the speedo. He was going downhill so it was definitly a gov. But here is the thing... The WRX is supposed to have a gov. as well. From what I've been told is that to remove it from the comp. you get going and once in 5th gear at say 65mph ( speed is not that important ). You must push the clutch in and put the car in neutral then let the clutch out. Once this is done then you can put it back into gear and the gov. should be gone. Again this is just what I've heard, so please no bashing on me but I would like to hear if anybody has heard or tried to see if this works. I'm not sure if this would work on the STI but I guess as simple as it is it wont hurt or take to long to try. Jeff
| No Go | 05-20-2004 08:40 PM |
I wish removing the limiter was that easy...:)
I've had mine to 153 mph and it was definitely hitting some govenor of some sort...152 then 153 then 152 then 151 then 152 then 153...bouncing at 153 for a mile. It did feel like more was left...
This was all indicated as well. Completely stock 2004 STI.
I would like to remove the limiter as well...tire/wheel bearing/trans concerns??? I doubt it. More like liability concerns-my guess.
I've had mine to 153 mph and it was definitely hitting some govenor of some sort...152 then 153 then 152 then 151 then 152 then 153...bouncing at 153 for a mile. It did feel like more was left...
This was all indicated as well. Completely stock 2004 STI.
I would like to remove the limiter as well...tire/wheel bearing/trans concerns??? I doubt it. More like liability concerns-my guess.
| ANZAC_1915 | 05-21-2004 12:12 AM |
You guys should stop guessing before you hurt yourselves.
| afpdl | 05-21-2004 02:04 AM |
[QUOTE][i]Originally posted by Glenn Wallace[/i]
[B] You guys should stop guessing before you hurt yourselves. [/B][/QUOTE]
Can you at least tell us if we remove the limiter and drive the car over where the limiter was will the car get damaged?
[B] You guys should stop guessing before you hurt yourselves. [/B][/QUOTE]
Can you at least tell us if we remove the limiter and drive the car over where the limiter was will the car get damaged?
| RallyCSX | 05-21-2004 02:19 AM |
Naw Fitz,
I was breaking the car in that weekend.
But I figure Sunday in South Carolina is a "Closed Course":lol:
I was breaking the car in that weekend.
But I figure Sunday in South Carolina is a "Closed Course":lol:
| trojan9x | 05-21-2004 07:29 AM |
[QUOTE][i]Originally posted by afpdl [/i]
[B]Can you at least tell us if we remove the limiter and drive the car over where the limiter was will the car get damaged? [/B][/QUOTE]
I think he means get into an accident
[B]Can you at least tell us if we remove the limiter and drive the car over where the limiter was will the car get damaged? [/B][/QUOTE]
I think he means get into an accident
| afpdl | 05-21-2004 02:36 PM |
[QUOTE][i]Originally posted by trojan9x[/i]
[B] I think he means get into an accident [/B][/QUOTE]
nope.
[B] I think he means get into an accident [/B][/QUOTE]
nope.
| ANZAC_1915 | 05-21-2004 03:58 PM |
[QUOTE][i]Originally posted by afpdl [/i]
[B]Can you at least tell us if we remove the limiter and drive the car over where the limiter was will the car get damaged? [/B][/QUOTE]
Most likely [i]you[/i] will get damaged, at that speed you'll be less concerned about what happens to the car.
i.e. the limiter is there for a reason
[B]Can you at least tell us if we remove the limiter and drive the car over where the limiter was will the car get damaged? [/B][/QUOTE]
Most likely [i]you[/i] will get damaged, at that speed you'll be less concerned about what happens to the car.
i.e. the limiter is there for a reason
| makofoto | 05-21-2004 04:17 PM |
But in the States, aren't we are taking about pretty short, occasional bursts ... out in the desert of course ...
Wonder what Gary Sheehan does ... I'll ask him ... he probably (?) has extra coolers for the gearbox and dif ?
Wonder what Gary Sheehan does ... I'll ask him ... he probably (?) has extra coolers for the gearbox and dif ?
| No Go | 05-21-2004 04:33 PM |
Glenn...you aren't really adding much to the disussion. :)
Many cars have limiters...BMW/Mercedes/Mazda/Toyota/even my VW GTI VR6.
It was limited (fuel cut) to 130 mph due to its cheaper H rated tires...the euro version and mine after I added Neuspeed chip would do ~140 mph on proper speed rated tires.
I'm guessing Subaru simply considers the car too fast on the top end...not like they have had a super (relatively speaking) high mph car before...and being based on a small chassis-Impreza...etc. I would expect that one could easily crank the boost and hit redline in top gear...not many times, but that equals something like ~172 mph...
It would be nice to figure out a way to deactivate it...there is a Top end race called the Pony Express in Nevada and even one here in Nebraska now...
Many cars have limiters...BMW/Mercedes/Mazda/Toyota/even my VW GTI VR6.
It was limited (fuel cut) to 130 mph due to its cheaper H rated tires...the euro version and mine after I added Neuspeed chip would do ~140 mph on proper speed rated tires.
I'm guessing Subaru simply considers the car too fast on the top end...not like they have had a super (relatively speaking) high mph car before...and being based on a small chassis-Impreza...etc. I would expect that one could easily crank the boost and hit redline in top gear...not many times, but that equals something like ~172 mph...
It would be nice to figure out a way to deactivate it...there is a Top end race called the Pony Express in Nevada and even one here in Nebraska now...
| afpdl | 05-21-2004 06:11 PM |
[QUOTE][i]Originally posted by makofoto[/i]
[B]
Wonder what Gary Sheehan does ... I'll ask him ... he probably (?) has extra coolers for the gearbox and dif ? [/B][/QUOTE]
With the power and weight he is running I doubt he ever sees north of 140 at a road course.
[QUOTE][i]Originally posted by Glenn Wallace[/i]
[B] Most likely [i]you[/i] will get damaged, at that speed you'll be less concerned about what happens to the car.
i.e. the limiter is there for a reason [/B][/QUOTE]
I doubt I will ever hit the limiter the at the local course I cant get much above 145 indicated before braking. I just want to know for knowing sake if the limiters reason is to keep people from going any faster or because the car cant take it.
[B]
Wonder what Gary Sheehan does ... I'll ask him ... he probably (?) has extra coolers for the gearbox and dif ? [/B][/QUOTE]
With the power and weight he is running I doubt he ever sees north of 140 at a road course.
[QUOTE][i]Originally posted by Glenn Wallace[/i]
[B] Most likely [i]you[/i] will get damaged, at that speed you'll be less concerned about what happens to the car.
i.e. the limiter is there for a reason [/B][/QUOTE]
I doubt I will ever hit the limiter the at the local course I cant get much above 145 indicated before braking. I just want to know for knowing sake if the limiters reason is to keep people from going any faster or because the car cant take it.
| renslin | 05-21-2004 06:17 PM |
I have had my 02 WRX to 146... I dont see why an STI should have a problem going faster. Mine is stock but the TXS TBE and CAI.
| afpdl | 05-21-2004 06:19 PM |
[QUOTE][i]Originally posted by renslin[/i]
[B] I have had my 02 WRX to 146... I dont see why an STI should have a problem going faster. [/B][/QUOTE]
The limiter is a big factor.
[B] I have had my 02 WRX to 146... I dont see why an STI should have a problem going faster. [/B][/QUOTE]
The limiter is a big factor.
| BlueSTI4Me | 05-21-2004 09:49 PM |
Limits are typically set based upon a number of factors.
-Cooling of certain components
-Durability of certain components
-Tire speed rating
But mainly tire speed rating (at least that is how one big 3 does it) Don't want to run at sustained high speed overheat and lose the tires. That would not be a good thing.
Blue
-Cooling of certain components
-Durability of certain components
-Tire speed rating
But mainly tire speed rating (at least that is how one big 3 does it) Don't want to run at sustained high speed overheat and lose the tires. That would not be a good thing.
Blue
| ANZAC_1915 | 05-21-2004 10:12 PM |
The tires are fine - rated to 168MPH.
The only thing different between 160 MPH and 10 MPH is the rotational speed of the driveline and wheels, and the airflow.
The only thing different between 160 MPH and 10 MPH is the rotational speed of the driveline and wheels, and the airflow.
| RaceComp Engineering | 05-22-2004 12:59 AM |
There is a thread in the archive that is a version 7 sti in taiwan that several magazines did stories on that did an indicated 184 mph, i think it was 312kmh !! That car had a large turbo, and alot of power, the point is that tranny is very similar to ours, if not even as good.
[url]http://forums.nasioc.com/forums/showthread.php?s=&threadid=289423&perpage=25&pagenumber=5[/url]
Take a look on page 5. So when I have hit the limiter, which FYI, shows 158, but is really a true 148,....it feels like it could pull 158-160 if given enough road.
The S202 is governed to 180mph, and does a true 168mph, with its bigger turbo, and higher revving engine.
I realize we have a big displacement 2.5 liter, and the JDM cars have a higher revving 2.0 liter, plus shorter 5th and 6th gears.
I cant wait to get the UTEC in to see if that can or does eliminate the governer.
Yes the hood scoop feels like its gonna just rip the hood off. but the car is aero good for 180mph or more. The Sti v limited was tested up to 180 mph in the wind tunnel.
Rob, I just think SOA, along with insurance ratings, etc, doesnt want anymore liability than 148 true mph. Dont know man,,...but I'll let you know when I get my UTEC. (taking orders[cough]...)
944 turbo guy
Myles Williams
Racecomp Engineering LLC
[url]www.racecompengineering.com[/url]
2720 Sisson st .
Baltimore, Md 21211
410-366-RACE (7223)
410-707-0108 cell
[url]http://forums.nasioc.com/forums/showthread.php?s=&threadid=289423&perpage=25&pagenumber=5[/url]
Take a look on page 5. So when I have hit the limiter, which FYI, shows 158, but is really a true 148,....it feels like it could pull 158-160 if given enough road.
The S202 is governed to 180mph, and does a true 168mph, with its bigger turbo, and higher revving engine.
I realize we have a big displacement 2.5 liter, and the JDM cars have a higher revving 2.0 liter, plus shorter 5th and 6th gears.
I cant wait to get the UTEC in to see if that can or does eliminate the governer.
Yes the hood scoop feels like its gonna just rip the hood off. but the car is aero good for 180mph or more. The Sti v limited was tested up to 180 mph in the wind tunnel.
Rob, I just think SOA, along with insurance ratings, etc, doesnt want anymore liability than 148 true mph. Dont know man,,...but I'll let you know when I get my UTEC. (taking orders[cough]...)
944 turbo guy
Myles Williams
Racecomp Engineering LLC
[url]www.racecompengineering.com[/url]
2720 Sisson st .
Baltimore, Md 21211
410-366-RACE (7223)
410-707-0108 cell
| StealthWagon | 05-22-2004 04:31 AM |
I'll check again, but i think our tires are not rated to 168, they are rated to 148 where the limiter is. I'm pretty sure the limiters on various cars correspond to the tires speed rating. I dont think any car company is going to risk selling a car that can do 170 on tires rated for 135mph.;)
| bezerk | 05-22-2004 05:56 AM |
I hit an indicated 155 mph at 6,000 rpm///what do you guy **** at 145 mph??????
is my speedo too optimistic????
is my speedo too optimistic????
| ANZAC_1915 | 05-22-2004 09:49 AM |
[QUOTE][i]Originally posted by StealthWagon [/i]
[B]I'll check again, but i think our tires are not rated to 168, they are rated to 148 where the limiter is. I'm pretty sure the limiters on various cars correspond to the tires speed rating. I dont think any car company is going to risk selling a car that can do 170 on tires rated for 135mph.;) [/B][/QUOTE]
I believe they are W rated, according to the Bridgestone site.
[B]I'll check again, but i think our tires are not rated to 168, they are rated to 148 where the limiter is. I'm pretty sure the limiters on various cars correspond to the tires speed rating. I dont think any car company is going to risk selling a car that can do 170 on tires rated for 135mph.;) [/B][/QUOTE]
I believe they are W rated, according to the Bridgestone site.
| Corn-Picker | 05-22-2004 03:18 PM |
[QUOTE][i]Originally posted by V8VENOM [/i]
[B]
5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)
[/B][/QUOTE]
I can see the next Subaru commercial. The Subaru WRX STi received 0 stars in the government 165 mph front end collision test :lol:
I'm leaving my limiter there. Before I mod a car I only have one question, if what I'm doing is better than stock, why didn't Subaru engineers do it in the first place? Sometimes, like with exhausts, I know the answer; FHI engineers couldn't make the STi catless because that would be slightly illegal. FHI engineers didn't include a ported and polished throttle body because that would be too costly. When I ask myself why something like a lightweight crank pulley wasn't included and something like a speed limiter is, I can reach only one conclusion; because that's the way FHI engineers thought it should be, and a team of thier engineers is smarter than me, so I accept their decision :)
[B]
5. Legal BS -- 147 was deemed "safer" than 165+ (but I'm not aware of any standards that require crash testing at those speeds)
[/B][/QUOTE]
I can see the next Subaru commercial. The Subaru WRX STi received 0 stars in the government 165 mph front end collision test :lol:
I'm leaving my limiter there. Before I mod a car I only have one question, if what I'm doing is better than stock, why didn't Subaru engineers do it in the first place? Sometimes, like with exhausts, I know the answer; FHI engineers couldn't make the STi catless because that would be slightly illegal. FHI engineers didn't include a ported and polished throttle body because that would be too costly. When I ask myself why something like a lightweight crank pulley wasn't included and something like a speed limiter is, I can reach only one conclusion; because that's the way FHI engineers thought it should be, and a team of thier engineers is smarter than me, so I accept their decision :)
| ANZAC_1915 | 05-23-2004 12:16 AM |
[QUOTE][i]Originally posted by Corn-Picker [/i]
[B]When I ask myself why something like a lightweight crank pulley wasn't included and something like a speed limiter is, I can reach only one conclusion; because that's the way FHI engineers thought it should be, and a team of thier engineers is smarter than me, so I accept their decision :) [/B][/QUOTE]
:cool:
They are indeed smart cookies.
[B]When I ask myself why something like a lightweight crank pulley wasn't included and something like a speed limiter is, I can reach only one conclusion; because that's the way FHI engineers thought it should be, and a team of thier engineers is smarter than me, so I accept their decision :) [/B][/QUOTE]
:cool:
They are indeed smart cookies.
| makofoto | 05-23-2004 08:03 AM |
I don't think it comes down to the engineeers ... even with Subaru ... it comes down to $$$ ;)
An example that is sort of the opposite of what we've been discussing ... the Forester 2.5 XT is being advertised as having 210 hp ... when it in fact has more like 200 at the Wheels! (As tested by Braille Auto Development in the current issue of RallyWorld) WRX's on their dyno develop between 168 and 185 whp. They suspect that Subaru is under rating the Foresters output in order not to take away WRX sales. Marketing manipulation by the company "run by engineers." :p
An example that is sort of the opposite of what we've been discussing ... the Forester 2.5 XT is being advertised as having 210 hp ... when it in fact has more like 200 at the Wheels! (As tested by Braille Auto Development in the current issue of RallyWorld) WRX's on their dyno develop between 168 and 185 whp. They suspect that Subaru is under rating the Foresters output in order not to take away WRX sales. Marketing manipulation by the company "run by engineers." :p
| RebelINS | 05-23-2004 12:23 PM |
IMO it is probably speed limited for safety/political reasons. I think this is true for alot of the german cars over here. If you look at where they are limited, a ton are at 155mph. I am sure many of those cars are capable of hitting well over that.
-Wes
-Wes
| ANZAC_1915 | 05-23-2004 12:26 PM |
[QUOTE][i]Originally posted by makofoto [/i]
[B]I don't think it comes down to the engineeers ... even with Subaru ... it comes down to $$$ ;)
An example that is sort of the opposite of what we've been discussing ... the Forester 2.5 XT is being advertised as having 210 hp ... when it in fact has more like 200 at the Wheels! (As tested by Braille Auto Development in the current issue of RallyWorld) WRX's on their dyno develop between 168 and 185 whp. They suspect that Subaru is under rating the Foresters output in order not to take away WRX sales. Marketing manipulation by the company "run by engineers." :p [/B][/QUOTE]
So what would be the reason to limit it?
The limiter is the same in many markets --- so it isn't anything to do with liability in the US, it is an engineering/safety issue.
[B]I don't think it comes down to the engineeers ... even with Subaru ... it comes down to $$$ ;)
An example that is sort of the opposite of what we've been discussing ... the Forester 2.5 XT is being advertised as having 210 hp ... when it in fact has more like 200 at the Wheels! (As tested by Braille Auto Development in the current issue of RallyWorld) WRX's on their dyno develop between 168 and 185 whp. They suspect that Subaru is under rating the Foresters output in order not to take away WRX sales. Marketing manipulation by the company "run by engineers." :p [/B][/QUOTE]
So what would be the reason to limit it?
The limiter is the same in many markets --- so it isn't anything to do with liability in the US, it is an engineering/safety issue.
| makofoto | 05-23-2004 02:56 PM |
Glenn ... Brain Fart on my part ... shouldn't Reply to threads while watching the Monaco GP at 5 in the morning!
Duh ... and I'm the one that pointed out that that german magazine said that the STI was top speed limited to protect it's gearbox ... and not for political reasons. Apparently there is an informal (?) agreement amount the german automakers to limit top speeds.
Duh ... and I'm the one that pointed out that that german magazine said that the STI was top speed limited to protect it's gearbox ... and not for political reasons. Apparently there is an informal (?) agreement amount the german automakers to limit top speeds.
| ANZAC_1915 | 05-23-2004 09:32 PM |
I'm going to go out on a limb and say if you're considering a tranny cooler for the STi, I'd get it for autocross. Tight turns, lots of DCCD action, that is the kind of thing that will cause it to get hot.
| makofoto | 05-24-2004 04:15 PM |
My friend in Germany has this to say about the general top speeds of cars over there (250 km/h = 155 mph):
>>>Concerning top speed of cars.
The main manufacturers like BMW, Audi, and Mercedes have made it clear they do not want to sell cars that will go faster than 250 km/h on regular roads / Autobahn. This is informal and just their factory sales. Of caurse if something like this happens you`ll find immediately suppliers who take the limiting chips out, tune the engine and then go much faster. Like the 500 SL of Mercedes will go 250 km/h, the "open version" I trust is published with 320 km/h.
I am not sure sure if the M5 has such a limitation? But most other cars say "top speed: - electronically controlled not to exceed 250 km" - this is not a law.
Porsche, Ferrari etc do not have such a self-limitation built in.<<<
>>>Concerning top speed of cars.
The main manufacturers like BMW, Audi, and Mercedes have made it clear they do not want to sell cars that will go faster than 250 km/h on regular roads / Autobahn. This is informal and just their factory sales. Of caurse if something like this happens you`ll find immediately suppliers who take the limiting chips out, tune the engine and then go much faster. Like the 500 SL of Mercedes will go 250 km/h, the "open version" I trust is published with 320 km/h.
I am not sure sure if the M5 has such a limitation? But most other cars say "top speed: - electronically controlled not to exceed 250 km" - this is not a law.
Porsche, Ferrari etc do not have such a self-limitation built in.<<<
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