| Aleksey | 12-10-2006 02:55 AM |
Under the hood of an 06 Impreza STi WRC
�
�
[B][SIZE="5"][COLOR="Red"]The truth is finally revealed, the main hood scoop on those cars is non-functional!!! [/COLOR][/SIZE][/B]:D:D:D
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa1.jpg[/img]
[B]the rest of the pics:[/B]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa.jpg[/img]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa2.jpg[/img]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa3.jpg[/img]
[size=4][B][COLOR="Red"]Notice a bigass rotated turbo! I wonder what turbo is that![/COLOR][/B][/size]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa4.jpg[/img]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa5.jpg[/img]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa1.jpg[/img]
[B]the rest of the pics:[/B]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa.jpg[/img]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa2.jpg[/img]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa3.jpg[/img]
[size=4][B][COLOR="Red"]Notice a bigass rotated turbo! I wonder what turbo is that![/COLOR][/B][/size]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa4.jpg[/img]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa5.jpg[/img]
| WRXedUSA | 12-10-2006 01:38 PM |
That layout is the departure from the norm of the past few years (IC mount, traditional manifold)
| Subaru_555 | 12-10-2006 01:47 PM |
Congrats, top-mount intercooling is not the most efficient. The centre of gravity is reduced when the intercooler is moved. They use an RX-6 IHI turbo w/ 34mm restrictor developed with Prodrive.
| burned | 12-10-2006 01:55 PM |
Ok i have laways wondered what the hell are those electronic units on top of the mainfold (ECU)? If i was an engeenier i would put it there lots of cool air trough the hood vent short cables whit low interference and more precise data flow.
| davis10 | 12-10-2006 02:07 PM |
[QUOTE=Aleksey;16272032]
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa4.jpg[/img]
[/QUOTE]
Why does the cold side intercooler pipe get so big then reduce back down to small size again? and its an abrupt decrease, increase (not much taper)?
They had a similar layout last year too making the vent in front of the hood scoop the most functional.
[img]http://smg.photobucket.com/albums/v26/Fatmanscooby/aaaa4.jpg[/img]
[/QUOTE]
Why does the cold side intercooler pipe get so big then reduce back down to small size again? and its an abrupt decrease, increase (not much taper)?
They had a similar layout last year too making the vent in front of the hood scoop the most functional.
| WRXedUSA | 12-10-2006 02:21 PM |
It's probably a cooling sleeve.
| ToyRX | 12-10-2006 07:06 PM |
You will probably find there is ducting on the underside of the bonnet from the scoop to the air filter (in the carbon pod).
| foxboroxt | 12-10-2006 08:42 PM |
If I remember correctly, that air filter is only functional at water crossings, when the co-driver closes a valve at the main air intake at the front of the car to keep water out of the motor. There still could be a duct leading to that filter, but it may get very little use as a functional air intake.
| Subaru_555 | 12-10-2006 08:56 PM |
[QUOTE=foxboroxt;16277175]If I remember correctly, that air filter is only functional at water crossings, when the co-driver closes a valve at the main air intake at the front of the car to keep water out of the motor. There still could be a duct leading to that filter, but it may get very little use as a functional air intake.[/QUOTE]
Ya note how the air filter is exposed. It is true that that duct is closed during water crossing however. I remember when the Subies used to have flooding problems.
Ya note how the air filter is exposed. It is true that that duct is closed during water crossing however. I remember when the Subies used to have flooding problems.
| davis10 | 12-10-2006 09:58 PM |
Im not sure if its closed or not during water crossings, but the problems with water crossings were caused by the force of the water damaging other parts on the engine not water intake.
| Slick Nick | 12-10-2006 10:04 PM |
In the coverage for this years Argentina rally the commentators said that the co-driver actually did close the primary intake and open the one from the hood scoop. I have no idea how they got this information or how to verify its accuracy but that is what they said the first time the subie came to a water crossing.
-Nick
-Nick
| big16gwrx | 12-10-2006 10:08 PM |
anyone know what kinda power this puts down on a dyno?
| psg | 12-10-2006 10:20 PM |
[QUOTE=big16gwrx;16277997]anyone know what kinda power this puts down on a dyno?[/QUOTE]
Around 300 bhp, and a butt-load of torque.
Around 300 bhp, and a butt-load of torque.
| Aleksey | 12-10-2006 10:38 PM |
[QUOTE=psg;16278125]Around 300 bhp, and a butt-load of torque.[/QUOTE]
Is there no torque limit in WRC rules, only horsepowers?
Is there no torque limit in WRC rules, only horsepowers?
| pio!pio! | 12-10-2006 10:40 PM |
Is that cool side piping a heimholtz resonator?
| John Vanos | 12-11-2006 05:45 AM |
that motor is somewhere in excess of 650 ft/lbs
I want one.
I want one.
| jamal | 12-11-2006 06:08 AM |
[QUOTE=Aleksey;16278321]Is there no torque limit in WRC rules, only horsepowers?[/QUOTE]
they don't limit power by saying "oh you can only have 300hp." There is an air restrictor (34mm?) on the intake, so the car can't get enough air to make power higher up in the rev range. They don't rev very high and run a boatload of boost which gives a nice flat torque curve until they run out of air.
Also the torque figures I've seen are more like 350 lb-ft.
Edit: 430 lb-ft according to SWRT.
they don't limit power by saying "oh you can only have 300hp." There is an air restrictor (34mm?) on the intake, so the car can't get enough air to make power higher up in the rev range. They don't rev very high and run a boatload of boost which gives a nice flat torque curve until they run out of air.
Also the torque figures I've seen are more like 350 lb-ft.
Edit: 430 lb-ft according to SWRT.
| Bimmubishi | 12-11-2006 06:25 AM |
the 2005 spec car made about 645 ft lbs. if my calculations are correct.
| burned | 12-11-2006 06:52 AM |
Our A8 whit a 34 restirctor kicked out around 320 hp from 2500 to 4700 rpm . for torque i dont have an idea. But a wrc puts out around 350 -370 hp and 700 Nm of torque and the impreza was one of the high hp output plants other cars didnt have as powerful engines. but over 370hp is phisicaly impossible because you dont get enough air.
| AlbaScoob | 12-11-2006 07:46 AM |
[QUOTE=Aleksey;16272032][B][SIZE="5"][COLOR="Red"]The truth is finally revealed, the main hood scoop on those cars is non-functional!!! [/COLOR][/SIZE][/B]:D:D:D
[/QUOTE]
you only just found that out?!!!
;)
[/QUOTE]
you only just found that out?!!!
;)
| solo-x | 12-11-2006 07:54 AM |
just picking a random rpm, 695lb/ft of torque at 4500rpm would equate to 556hp. anyhow, 700Nm converts to 516ft/lbs, which is still a whole crap load of torque. and the peak would have to happen somewhere around 3500-3700rpm to get 370hp. for the 695ft/lb number to work, peak torque would have to happen around 3k rpm. so the number itself is impressive, but the fact that it occurs at desiel engine rpm's is what is truly amazing.
| Calamity Jesus | 12-11-2006 08:05 AM |
[QUOTE=WRXedUSA;16274092]That layout is the departure from the norm of the past few years (IC mount, traditional manifold)[/QUOTE]
I'm pretty sure the layout changes depending on the type of rally. Tarmac, snow/dirt and Australia (snorkle) each have different configurations based on the need to protect fragile parts (intercooler).
I'm pretty sure the layout changes depending on the type of rally. Tarmac, snow/dirt and Australia (snorkle) each have different configurations based on the need to protect fragile parts (intercooler).
| burned | 12-11-2006 08:20 AM |
[quote=solo-x;16280949]just picking a random rpm, 695lb/ft of torque at 4500rpm would equate to 556hp. anyhow, 700Nm converts to 516ft/lbs, which is still a whole crap load of torque. and the peak would have to happen somewhere around 3500-3700rpm to get 370hp. for the 695ft/lb number to work, peak torque would have to happen around 3k rpm. so the number itself is impressive, but the fact that it occurs at desiel engine rpm's is what is truly amazing.[/quote]
well it isnt that amaizing it would be if it wasnt for one thing the ALS you can have such horspower and torque at low rpm if you have boost there. our car has 1,2 bar of pressure form a standard turbo at iddeling (2200 rpm) and 1,7 bar from 2600 to 4500 than it falls down because of lack of air
well it isnt that amaizing it would be if it wasnt for one thing the ALS you can have such horspower and torque at low rpm if you have boost there. our car has 1,2 bar of pressure form a standard turbo at iddeling (2200 rpm) and 1,7 bar from 2600 to 4500 than it falls down because of lack of air
| Subaru_555 | 12-11-2006 10:17 AM |
[QUOTE=davis10;16277913]Im not sure if its closed or not during water crossings, but the problems with water crossings were caused by the force of the water damaging other parts on the engine not water intake.[/QUOTE]
In 2004 in Turkey, Petter had problems with his engine's air intake after going through a water splash.
In 2004 in Turkey, Petter had problems with his engine's air intake after going through a water splash.
| [email�protected] | 12-11-2006 12:27 PM |
The WRC2002 was the last car to use the RX6 turbo. Since then, prototype IHI units have been used.
Torque figures are in the 450 ft/lbs range. There is only so much air a restrictor can pull through and I'm sure the limit is close to what they are putting out now.
Torque figures are in the 450 ft/lbs range. There is only so much air a restrictor can pull through and I'm sure the limit is close to what they are putting out now.
| slidecontrol | 12-11-2006 02:16 PM |
I'm suprised to see zip ties (on chrome cylinder) and worm gear clamps used.
| Menik | 12-11-2006 02:28 PM |
[QUOTE=Aleksey;16272032][B][SIZE="5"][COLOR="Red"]The truth is finally revealed, the main hood scoop on those cars is non-functional!!! [/COLOR][/SIZE][/B]:D:D:D[/QUOTE]
These photos are actually pretty dated, I believe they are from the 2006 Prototype. I have more recent ones (of Solberg & Atkinson's actual cars) from this summer when I was at Prodrive:
[IMG]http://web.mac.com/shuriken23/iWeb/Site/Prodrive%20Open%20Day_files/DSC01509.jpg[/IMG]
Note the rigid intake plumbing, intercooler fan, etc.
More photos: [URL="http://web.mac.com/shuriken23"]click here[/URL].
These photos are actually pretty dated, I believe they are from the 2006 Prototype. I have more recent ones (of Solberg & Atkinson's actual cars) from this summer when I was at Prodrive:
[IMG]http://web.mac.com/shuriken23/iWeb/Site/Prodrive%20Open%20Day_files/DSC01509.jpg[/IMG]
Note the rigid intake plumbing, intercooler fan, etc.
More photos: [URL="http://web.mac.com/shuriken23"]click here[/URL].
| Patrick Olsen | 12-11-2006 04:38 PM |
Is the grey horseshoe shape on the top of the CF intake perhaps a flapper for air to come in from the top? There are 3 screws at the open end of the horseshoe, perhaps a hinge there?
[quote=davis10]Why does the cold side intercooler pipe get so big then reduce back down to small size again? and its an abrupt decrease, increase (not much taper)?[/quote]
I was wondering the same thing. I imagine internally there's a velocity stack on the outlet end to smooth the airflow. I was wondering if that enlarged section validates the old "torque box" theory on the N/A cars - a reservoir of air for better throttle response?
Pat
[quote=davis10]Why does the cold side intercooler pipe get so big then reduce back down to small size again? and its an abrupt decrease, increase (not much taper)?[/quote]
I was wondering the same thing. I imagine internally there's a velocity stack on the outlet end to smooth the airflow. I was wondering if that enlarged section validates the old "torque box" theory on the N/A cars - a reservoir of air for better throttle response?
Pat
| Menik | 12-11-2006 05:14 PM |
[QUOTE=Patrick Olsen;16287542]I was wondering the same thing. I imagine internally there's a velocity stack on the outlet end to smooth the airflow. I was wondering if that enlarged section validates the old "torque box" theory on the N/A cars - a reservoir of air for better throttle response?
Pat[/QUOTE]
According to one of the guys on the SWRT service crew, it's not a velocity stack. Somehow, (he wouldn't go into detail) it's supposed to help stop compressor surge, I don't know how it would or why that would even be an issue as they are using a large vent-to-atmosphere BOV... :confused:
Pat[/QUOTE]
According to one of the guys on the SWRT service crew, it's not a velocity stack. Somehow, (he wouldn't go into detail) it's supposed to help stop compressor surge, I don't know how it would or why that would even be an issue as they are using a large vent-to-atmosphere BOV... :confused:
| kotaro | 12-11-2006 06:09 PM |
[QUOTE=Menik;16288112]According to one of the guys on the SWRT service crew, it's not a velocity stack. Somehow, (he wouldn't go into detail) it's supposed to help stop compressor surge, I don't know how it would or why that would even be an issue as they are using a large vent-to-atmosphere BOV... :confused:[/QUOTE]
:huh: why would they use a bov?
Shouldn't they be running no bov+als?
:huh: why would they use a bov?
Shouldn't they be running no bov+als?
| JTJ 2.5 | 12-11-2006 06:21 PM |
[QUOTE=Patrick Olsen;16287542]Is the grey horseshoe shape on the top of the CF intake perhaps a flapper for air to come in from the top? There are 3 screws at the open end of the horseshoe, perhaps a hinge there?
[/QUOTE]
Or is that the flap that they started running after the were having issues ingesting water during water crossings?
[/QUOTE]
Or is that the flap that they started running after the were having issues ingesting water during water crossings?
| Chromer | 12-11-2006 07:19 PM |
[QUOTE=slidecontrol;16285353]I'm suprised to see zip ties (on chrome cylinder) and worm gear clamps used.[/QUOTE]
<shrug> They're quick to service, especially the zip ties.
<shrug> They're quick to service, especially the zip ties.
| Subaru_555 | 12-11-2006 07:25 PM |
[[email�protected];16283708]The WRC2002 was the last car to use the RX6 turbo. Since then, prototype IHI units have been used.
Torque figures are in the 450 ft/lbs range. There is only so much air a restrictor can pull through and I'm sure the limit is close to what they are putting out now.[/QUOTE]
Ya they always list it as a "new" IHI unit.
Torque figures are in the 450 ft/lbs range. There is only so much air a restrictor can pull through and I'm sure the limit is close to what they are putting out now.[/QUOTE]
Ya they always list it as a "new" IHI unit.
| fliz | 12-11-2006 07:57 PM |
[QUOTE=JTJ 2.5;16288906]Or is that the flap that they started running after the were having issues ingesting water during water crossings?[/QUOTE]
Well, if it hinged that way it would direct air from the front out the top of the intake pipe, not air from the hoodscoop into the turbo.
Well, if it hinged that way it would direct air from the front out the top of the intake pipe, not air from the hoodscoop into the turbo.
| John Vanos | 12-12-2006 06:35 AM |
450 ft/lbs at the wheels I could see but even then that should be a little low. From my experience with rally engines its very easy to get almost 400 ft/lbs torque at the wheels even on a stock turbo
Edit: Typos
Edit: Typos
| burned | 12-12-2006 06:46 AM |
[quote=kotaro;16288785]:huh: why would they use a bov?
Shouldn't they be running no bov+als?[/quote]
not using a bov would be an idiotic thing backpressure would stop the turbo less throttle response and less power. turbo must be spinning at all times! Some smart ass mechanic had blocked the bov on our impreza and the result was hotter air in the ic by letting excess air out of the ic one of good things is that the ic dosent accumulate heat ergo colder air more hp.
for instance air temperature whit bov is around 25 C whitout it was 45 C !
Shouldn't they be running no bov+als?[/quote]
not using a bov would be an idiotic thing backpressure would stop the turbo less throttle response and less power. turbo must be spinning at all times! Some smart ass mechanic had blocked the bov on our impreza and the result was hotter air in the ic by letting excess air out of the ic one of good things is that the ic dosent accumulate heat ergo colder air more hp.
for instance air temperature whit bov is around 25 C whitout it was 45 C !
| Homemade WRX | 12-12-2006 08:42 AM |
[QUOTE=Bimmubishi;16280754]the 2005 spec car made about 645 ft lbs. if my calculations are correct.[/QUOTE]
what calculations is that?...did you account for the massive VE loss due to restrictor and also what compressor map did you use, as I'm pretty sure you would have used a boost reference.
Just curious, not trying to ream you.
-Micah
what calculations is that?...did you account for the massive VE loss due to restrictor and also what compressor map did you use, as I'm pretty sure you would have used a boost reference.
Just curious, not trying to ream you.
-Micah
| kotaro | 12-12-2006 04:09 PM |
[QUOTE=burned;16294271]not using a bov would be an idiotic thing backpressure would stop the turbo less throttle response and less power.[/QUOTE]
I've read opinions from credible people stating otherwise...
[url]http://bbs.scoobynet.com/drivetrain-11/28135-how-make-my00-sound-like-rally-car.html?highlight=compressor+chirp[/url]
[QUOTE=johnfelstead]There is an awefull lot of bollix and misinformation floating around about dump valves. Must be the biggest single con by the tuning trade in the history of turbo tuning.
The reason car manufacturers fit BOV's is to prolong the life of the turbo, to allow them to get away with selling cars fitted with 300 degree thrust bearings.
Having a BOV on a turbo engine reduces throttle response, it allows boost that would be there to bleed away.
Fitting an aftermarket BOV that vents to atmosphere is bad news on an engine that uses a MAF sensor to meter airflow.
Removing a BOV from the system will give you better throttle response than having it there. Do this with a standard turbo and you will reduce its life.
If you want to run without a BOV to get better response then a good idea is to use an uprated turbo with a 360 degree thrust bearing. (I have run normal 300 degree bearing turbos without BOV's for over 12 months on track days and road without a problem.)
The only time it becomes esential to use a BOV is when you get to using turbos the size of an RS500 full race T4. Anything smaller than that and you do not have any problem whatsoever without a BOV.
No WRC car runs a BOV, WRC spec anti lag systems wont work with a BOV.
Turbo's of the size we use on our subaru's and cosworth's do not suffer from reverse pulses stalling the turbo, thats complete bollox. I have discussed this at length with WRC engine builders and they all agree this is not what happens.
The chatter is the sound of the exhaust gasses passing through the waste gate button in the turbo housing. You need very high exhaust gas speeds to cause the waste gate to chatter, this is something you only start to see when you run high boost. WRC engines run at 34PSI boost at low revs (3000rpm) and this is bled away as the revs rise to stop the air going supersonic as it passes through the 34mm turbo restrictor. This is why the chatter is more noticable at low speed transitions as the revs are lower and the boost is much higher on WRC cars.
The boost curve is far more conventional on my own engine, that gives 26PSI boost at 3300rpm and then only drops 3psi till 6000rpm so i get chatter right accross the rev range.
Do i use a BOV? NO
Do i need one? NO
Does my turbo have a 360 degree bearing? Yes[/QUOTE]
There's lots of old threads about this:
[url]http://bbs.scoobynet.com/general-technical-10/386837-whats-wrc-chirp.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/184969-wrc-type-dump-blow-off-valve.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/66059-what-kind-dump-valve.html?highlight=compressor+chirp[/url]
I've read opinions from credible people stating otherwise...
[url]http://bbs.scoobynet.com/drivetrain-11/28135-how-make-my00-sound-like-rally-car.html?highlight=compressor+chirp[/url]
[QUOTE=johnfelstead]There is an awefull lot of bollix and misinformation floating around about dump valves. Must be the biggest single con by the tuning trade in the history of turbo tuning.
The reason car manufacturers fit BOV's is to prolong the life of the turbo, to allow them to get away with selling cars fitted with 300 degree thrust bearings.
Having a BOV on a turbo engine reduces throttle response, it allows boost that would be there to bleed away.
Fitting an aftermarket BOV that vents to atmosphere is bad news on an engine that uses a MAF sensor to meter airflow.
Removing a BOV from the system will give you better throttle response than having it there. Do this with a standard turbo and you will reduce its life.
If you want to run without a BOV to get better response then a good idea is to use an uprated turbo with a 360 degree thrust bearing. (I have run normal 300 degree bearing turbos without BOV's for over 12 months on track days and road without a problem.)
The only time it becomes esential to use a BOV is when you get to using turbos the size of an RS500 full race T4. Anything smaller than that and you do not have any problem whatsoever without a BOV.
No WRC car runs a BOV, WRC spec anti lag systems wont work with a BOV.
Turbo's of the size we use on our subaru's and cosworth's do not suffer from reverse pulses stalling the turbo, thats complete bollox. I have discussed this at length with WRC engine builders and they all agree this is not what happens.
The chatter is the sound of the exhaust gasses passing through the waste gate button in the turbo housing. You need very high exhaust gas speeds to cause the waste gate to chatter, this is something you only start to see when you run high boost. WRC engines run at 34PSI boost at low revs (3000rpm) and this is bled away as the revs rise to stop the air going supersonic as it passes through the 34mm turbo restrictor. This is why the chatter is more noticable at low speed transitions as the revs are lower and the boost is much higher on WRC cars.
The boost curve is far more conventional on my own engine, that gives 26PSI boost at 3300rpm and then only drops 3psi till 6000rpm so i get chatter right accross the rev range.
Do i use a BOV? NO
Do i need one? NO
Does my turbo have a 360 degree bearing? Yes[/QUOTE]
There's lots of old threads about this:
[url]http://bbs.scoobynet.com/general-technical-10/386837-whats-wrc-chirp.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/184969-wrc-type-dump-blow-off-valve.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/66059-what-kind-dump-valve.html?highlight=compressor+chirp[/url]
| kotaro | 12-12-2006 04:12 PM |
sorry for drifting off topic...
back on topic, here's an interesting article about the subaru wrc engine, a couple years old but it's still worth a read if you haven't already (post #6 and below):
[url]http://forums.nasioc.com/forums/showthread.php?t=681776&highlight=wrc+engine+specs[/url]
back on topic, here's an interesting article about the subaru wrc engine, a couple years old but it's still worth a read if you haven't already (post #6 and below):
[url]http://forums.nasioc.com/forums/showthread.php?t=681776&highlight=wrc+engine+specs[/url]
| burned | 12-12-2006 04:27 PM |
well i was talking from my experience whit a group A8 subaru engine and what older mechanic have told me about a WRC engine(have never touched one).
On a standard top mount ic (you cant drive whit front one on a N or a group) you need BOV to empty the hot air from the IC.
PS Thank you for the article some old and some new facts for me.
On a standard top mount ic (you cant drive whit front one on a N or a group) you need BOV to empty the hot air from the IC.
PS Thank you for the article some old and some new facts for me.
| kotaro | 12-12-2006 04:38 PM |
[QUOTE=burned;16300911]well i was talking from my experience whit a group A8 subaru engine and what older mechanic have told me about a WRC engine(have never touched one).
On a standard top mount ic (you cant drive whit front one on a N or a group) you need BOV to empty the hot air from the IC.
PS Thank you for the article some old and some new facts for me.[/QUOTE]
No prob, I have no first hand experience whatsoever, just posting what I've read in other places :D .
On a standard top mount ic (you cant drive whit front one on a N or a group) you need BOV to empty the hot air from the IC.
PS Thank you for the article some old and some new facts for me.[/QUOTE]
No prob, I have no first hand experience whatsoever, just posting what I've read in other places :D .
| Subaru_555 | 12-12-2006 07:39 PM |
[QUOTE=kotaro;16300601]I've read opinions from credible people stating otherwise...
[url]http://bbs.scoobynet.com/drivetrain-11/28135-how-make-my00-sound-like-rally-car.html?highlight=compressor+chirp[/url]
There's lots of old threads about this:
[url]http://bbs.scoobynet.com/general-technical-10/386837-whats-wrc-chirp.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/184969-wrc-type-dump-blow-off-valve.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/66059-what-kind-dump-valve.html?highlight=compressor+chirp[/url][/QUOTE]
Great info man, awesome read.
[url]http://bbs.scoobynet.com/drivetrain-11/28135-how-make-my00-sound-like-rally-car.html?highlight=compressor+chirp[/url]
There's lots of old threads about this:
[url]http://bbs.scoobynet.com/general-technical-10/386837-whats-wrc-chirp.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/184969-wrc-type-dump-blow-off-valve.html?highlight=compressor+chirp[/url]
[url]http://bbs.scoobynet.com/drivetrain-11/66059-what-kind-dump-valve.html?highlight=compressor+chirp[/url][/QUOTE]
Great info man, awesome read.
| meebs | 12-13-2006 12:15 AM |
I've always loved the look of the matt-finish on the exhaust tip... Anyone know what material that is?
| davis10 | 12-13-2006 01:26 AM |
^^^^ galvanized steel?
you would think titanium would be the best especially with their budget, but maybe sice they had already hit minimum weight they used galvanized steel, thats just what it looks like.
you would think titanium would be the best especially with their budget, but maybe sice they had already hit minimum weight they used galvanized steel, thats just what it looks like.
| SubaruCO | 12-13-2006 05:29 PM |
I'm pretty sure that Crawford also runs at least one of thier cars without a BOV as well.
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