2002 Subaru WRX around 320hp with:

Free flow exhaust
Upgraded turbocharger, boost up to 1.5 bar (27 psi)
Upgraded intercoolers
Upgraded intake


Any estimate as to performance times? 0-60? 1/4mile? 0-100?

Just curious, thanks.

lol 27 PSI, that's nuts...

It's always hard to just blindly estimate numbers like that, it depends a lot on the driver, how good the clutch is, the tires, conditions, etc.

All things remain the same it could probably shave 1-.5 seconds off 0-60

lol 27 PSI, that's nuts...

It's always hard to just blindly estimate numbers like that, it depends a lot on the driver, how good the clutch is, the tires, conditions, etc.

All things remain the same it could probably shave 1-.5 seconds off 0-60

Damn that's a fast car-- but wouldn't the car forfeit its reliability for so much boost?

It should be hitting mid 12s. A friend of mine hit high 12s with a little under 300 whp on his wrx. And BTW 27psi is a little extreme me thinks...

Extreme maybe, but it's necessary since the Evo can go faster that the WRX with less horsepower. And you know it's getting serious cuz the car in question is 300bhp STI tuned WRX. So I guess this is subarus last resort.

STi engine is quite different. They tuned it to handle the increased pressure. And Kenny, I'd definitely think the reliability would be compromised.

Extreme maybe, but it's necessary since the Evo can go faster that the WRX with less horsepower. And you know it's getting serious cuz the car in question is 300bhp STI tuned WRX. So I guess this is subarus last resort.Im pretty sure that hes talking about an after market tuned WRX...

You are way to vague, you can’t even hope for a half correct answer.

Maybe Gran Turismo can tell you..

thats some serious re-working to be able to handle 27psi... i mean, christ... if you have to push that much boost through the engine to make 320hp, then you have a MAJOR problem in the system somewhere else in the car.

i mean, christ, is the exhaust manifold stuffed full of bananas or something?

methinks that 27psi number is off... but i really doubt that it was meant as 1.5bar, as in 14.7psi for atmospheric, and 7.75psi above atmospheric... what is the stock boost level for that thing?

ive known a few people who have run 30+ psi in their old audi I5 turbo engines, but that would result in nearly 500-550hp...

you are also probably heat soaking the turbo and the intercooler with all that boost, causing a lower level of performance in addition...

anyway........

I've heard of companies that have been ceramic coating the inside of the turbos to reduce the amount of heat.

Considering this is probably the car of one of Kenneth's retarded friends who also hump on cars on a daily basis, I see a topic about blown Subaru engines in the near future...

Stock boost on a WRX is either right at or a little under 14psi. You can push that much to the wheels at probably around 20psi if not less. At 27 psi you are certainly right about the fact that he should be pushing out MUCH more than 320whp. And that car is gonna blow very very soon.

I know the STi pushes about 14.5...

27psi is a lot of boost... You'd need a lot more than what your buddy is talking about too. Anyway.. Subbies suck.

Stock boost on a WRX is either right at or a little under 14psi. You can push that much to the wheels at probably around 20psi if not less. At 27 psi you are certainly right about the fact that he should be pushing out MUCH more than 320whp. And that car is gonna blow very very soon.

If the HP is that low, is the car running really rich? You don't wanna run too rich cause you're just dumping out raw gas. Run too lean, and that engine will get so hot, it'll be a ticking time bomb. If the engine's gonna blow from too much boost, it sounds like he's gonna need a new set of lower compression pistons.

If the HP is that low, is the car running really rich? You don't wanna run too rich cause you're just dumping out raw gas. Run too lean, and that engine will get so hot, it'll be a ticking time bomb. If the engine's gonna blow from too much boost, it sounds like he's gonna need a new set of lower compression pistons.
or just tune it :rolleyes:

It's not that, it's just the way you guys were talking about the engine blowing that it would require more than tuning.

Im pretty sure that hes talking about an after market tuned WRX...

Oh, I see.... But I just want to say to Kenny that he'll need more than a 320bhp Impreza to beat the Evo 8 :)

Last month's test of the new Evo VIII at the Bedford Autodrome was a little overshadowed by the performance of the unlikely Porsche Cayenne Turbo, but the Evo's superb lap time suggested that in the contest that matters, against the new Subaru Impreza STi, the Mitsubishi has moved the game on. The Evo lapped the West circuit a cool 2.3sec quicker than the Impreza managed (evo 053), and that was a Prodrive-massaged STi with 300bhp.Not only was the Evo quicker, it was tidy, precise and undramatic. A deeply impressive performance.

And now Mitsubishi Motors has announced this, the 'FQ-300', a more powerful version with just over 300bhp and 300lb ft of torque. It costs £28,995, exactly £2000 more than the standard 276bhp model, and is identified by a drainpipe-like exhaust, carbon-trimmed boot spoiler, standard-fit front foglamps, and a smattering of FQ-300 badges.

Oh, btw the FQ330 is out already :eek:, so to the Impreza owners... get an Evo.

What is the stock boost level of an Evo? Is there a possiblity of + or - of that number?

stock the evo boosts at 19.5 IIRC

I think the stock boost for the FQ-330 is either 1.2 or 1.4 bar.

My friend has a black stock evo and he installed a turbo timer, that was reading boost levels of 22psi. Seemed kind of high for a stock car. Thats why I was curious as to what the stock psi was.

I dunno..... I did a quick google search and it seems like it's around 15 to 16+ PS1. If he bought the car used, it could've been slightly modified.

What are you talking about??? The Evo is 19.5 psi stock end of story.

I dunno about you electronlude, but I know a lot of guys who owns evos (from 3-7 and I myself have been inside of few, standard and modified) and they all say Evo stock boost pressure is at 1.2bar which translate to 17.6 psi if you time it by 14.7. I dunno about Evo 8 though, but I cant imagine it being higher cuz that'll make the car exceed the 280hp limit.

But I could be wrong, you can always try look on the net :)

What are you talking about??? The Evo is 19.5 psi stock end of story.

Okay, so I kinda misread it. I did a search and skimmed through the description summary. Techincally, I was right since I was paying attention to the redline RPM's.

"According to Mitsubishi, the twin scroll turbo is making 19 psi of boost pressure at wide-open throttle at 3500 rpm and 16.2 psi of boost at WOT at 6500 rpm."

http://www.sportcompactcarweb.com/features/0303scc_lancer/

So could anyone explain why the turbo timer would show 22psi? Can turbo timers show boost pressure, especially peak boost? Are there any turbo timers that read boost and therefore null the use of a boost gauge?

I havent seen a turbo timer with a built in boost gauge but of course that doesnt mean that it doesnt exist...

Blitz has one..

Hmmmm...I think it might be a blitz turbo timer that he bought, but I'll have to go check with him. Either way 22psi is a hellva lot of boost.

thats some serious re-working to be able to handle 27psi... i mean, christ... if you have to push that much boost through the engine to make 320hp, then you have a MAJOR problem in the system somewhere else in the car.

i mean, christ, is the exhaust manifold stuffed full of bananas or something?

methinks that 27psi number is off... but i really doubt that it was meant as 1.5bar, as in 14.7psi for atmospheric, and 7.75psi above atmospheric... what is the stock boost level for that thing?

ive known a few people who have run 30+ psi in their old audi I5 turbo engines, but that would result in nearly 500-550hp...

you are also probably heat soaking the turbo and the intercooler with all that boost, causing a lower level of performance in addition...

anyway........

you dont have the least idea what you're talking about. my civic runs 1.7 bar of boost. by comparison, a stock eclipse gts can run 20psi of boost without detonation (on race gas).

lol@ you telling UrQ that he doesnt know what he's talking about... he's saying that if you need 27 psi to make only 320hp you have problems...

lol@ you telling UrQ that he doesnt know what he's talking about... he's saying that if you need 27 psi to make only 320hp you have problems...

I misread his statement to be 27psi as being too much boost pressure in general. In light of this, it seems to me that it is actually possible to run that high of boost and get 320hp. I recall reading an article a while back about a Ford Festiva with a GTX engine in it boosing around that and making just under 300whp. I guess it depends on the engine huh? :P

The older Audi I-5s UrQ is talking about have similar displacement and probably terrible cylinder head design (at least for the 10Vs, were the 20Vs ever sold here? Or am I thinking RS2) and if they're making 500HP at that boost pressure, I really think the Subaru should be making more than 300. I can't imagine the stock turbo running that much boost without being inefficient to the point of just plain counterproductivity.

The older Audi I-5s UrQ is talking about have similar displacement and probably terrible cylinder head design (at least for the 10Vs, were the 20Vs ever sold here? Or am I thinking RS2) and if they're making 500HP at that boost pressure, I really think the Subaru should be making more than 300. I can't imagine the stock turbo running that much boost without being inefficient to the point of just plain counterproductivity.
A stock turbo on a WRX cant handle much more than one bar. Maybe 16psi at most. So considering that this car has upgraded turbo at 27psi he should easily be hitting 400+ whp. A friend of mine hit about 300 on an upgraded turbo at a little over a bar.

oh yeah and i dont know if anyone else had noticed this but 1.5 bar does not equal 27psi. 1.5 bar is about 22.

The person who started this thread, Kenny, is very misinformed.

I didn't see "built engine" in the list of mods that you listed so it would be impossible to do 0-60, much less a quarter mile. I would also say that you would need engine management, but you could feasibly run 27psi on a well built racing engine until you get detonation.

I own a 2004 STi which is stronger than the 2.0-engined WRX and so far the most powerful engine reliably running stock-internal is World One Racing's STi that pushes out about 430AWHP at 23psi from a large Forced Performance FP Green turbo. That's over 500 horses at the crank. A turbo large enough to not be out of it's flow range at 27psi would create much more power than 320 hp even in a WRX engine. You get the picture.

You can read about World One Racing's STi in Primedia's Super Street and Sport Compact Car upcoming issues since it placed 4th out of a field of about 30 other sponsored tuned cars in the 1st Annual Time Attack. You can see a few pics and read more about it here:
http://clubwrx.net/forums/showthread.php?s=&threadid=60248

you dont have the least idea what you're talking about. my civic runs 1.7 bar of boost. by comparison, a stock eclipse gts can run 20psi of boost without detonation (on race gas).
LOL... yea no one knows anything here. You're smart. :rolleyes: