Location: Oceanside, California
Vehicle: 2004 Subaru Impreza WRX STi

Modification List Includes:
Crawford Performance S3L Short Block
Crawford Performance CP30R Turbo Kit
Crawford Performance TGV Deletes
Crawford Performance Max Street Clutch
Crawford Performance Catback Exhaust System
Front Mount Intercooler
I-Speed USA Programmed ECU
Walbro Fuel Pump
720cc Injectors

Engine Management Information:
Goals: Reliable and Daily Driven Car
100 Octane, Pump Gas @ 26 PSI

Dyno Chart Verification:
http://www.crawfordperformance.com/products/images/CP_S3L_30R_100.jpg

Dyno Graph Simulator Verification:
http://www.crawfordperformance.com/products/images/S3L-CP30R_100-OCT.png

For more details including:
Wheel horsepower/torque, SAE Corrections, G-Force, Scaling, etc...
Dyno Graph Simulator Verification Link (http://www.i-speed.us/dyno_results/db_viewDyno.cgi?tuneId0=137&tuneId1=109&titleId0=S3L-CP30R&titleId1=stock)

How a 500+ hp car should be able drive around town.
Video's for the daily driver. (http://www.crawfordperformance.com/forum/viewtopic.php?p=15437)

Cheers,
I-Speed USA

Holy sickness... what kind of head work to rev it to 8000 and still make power?

The car makes 430 WHP (uncorrected) at its peak and it goes down to about 340 WHP (uncorrected) at 8000 rpm. I wouldn’t call that making power at high rpm. It basically lost 100 hp between its peak at 6600 rpm and 8000 rpm. Maybe the turbo is just too small? I wonder if a 35R or something bigger would keep making good power even at 8000 rpm.

yeah, definitely shift at 7k.

stock it made 252whp damn thats pretty good for a stock car so it made 190 more whp with all those mods

Thats a nice HUGE drop off in power.

Car would be great for wangan...lol while other sti's are shifting you'd keep going with over 400hp to 8k....the car's gearing will max out before top rpm is reached, i would assume. As far as the drop off...who cares it drops of to peak stock sti acceleration at 8000 rpms! If that's not enough then i don't know what is.

Car would be great for wangan...lol while other sti's are shifting you'd keep going with over 400hp to 8k....the car's gearing will max out before top rpm is reached, i would assume. As far as the drop off...who cares it drops of to peak stock sti acceleration at 8000 rpms! If that's not enough then i don't know what is.
the cars gearing will max out? what does that even mean?

Holy sickness... what kind of head work to rev it to 8000 and still make power?

This package actually runs stock heads and cams.


425HP at 8000RPM :banana:


Quirt Crawford
www.crawfordperformance.com

Was anything special done to this block to allow it to run 8k rpms safely?

Was anything special done to this block to allow it to run 8k rpms safely?


How about "How many track hours have one of these lasted to 8k?"

the cars gearing will max out? what does that even mean?

I'm sure he means he'll be able to keep going without shifting

Don't forget that with this kind of power level 4th gear is going to run out on a 1/4 mile pass. 8000 rpm is going to run a better time than if he was forced to shift into 5th

Don't forget that with this kind of power level 4th gear is going to run out on a 1/4 mile pass. 8000 rpm is going to run a better time than if he was forced to shift into 5th
Nope, he'll still have to shift - 8K in 4th will only get him to @ 110mph.

Thats a nice HUGE drop off in power.

Sure, but consider the gearing. A bit of headwork might help it out a bit too. I just see it as room to grow :)

Car must be a monster on the street...

Well the beuty of 8K .... is when that engine is making that kind of power the diff between 7kand 8k rpm is about a half second.. so it is insurance to give you room to shift out. Just another safe guard.

Well the beuty of 8K .... is when that engine is making that kind of power the diff between 7kand 8k rpm is about a half second.. so it is insurance to give you room to shift out. Just another safe guard.
you need a 100 octane tune. thats your same setup.

It probably makes sense to wind 1st and 2nd gear out to 8k due to gearing, probably 4th as well.

So, straightup C3L? No other mods to the engine? Oil pressure? Other mods to crank? Could I expect to run 8k safely with what is being presented here?

What size is the hot side of the turbo? .63, .82?

What size is the hot side of the turbo? .63, .82?


.82 on the hot side :)

Was anything special done to this block to allow it to run 8k rpms safely?

This graph is from our standard S3L block. :)

How about "How many track hours have one of these lasted to 8k?"

Good question, only time will tell :)

not sure if this is relevant....but would an aftermarket ignition system help that power at high rpms......just something i heard of on another suby with huge power trying to rev that high.......
or are the heads the limiting factor here?

I respect you Qurit but I know something you and Cobb know.

Nope, he'll still have to shift - 8K in 4th will only get him to @ 110mph.

That is the biggest problem in racing STis - terrible gearing. Having to shift five times on even a completely stock setup is insane. The gearing is definitely not setup for the dragstrip. Fixing this gearing is one of the biggest things one can do to get better times. Given the power band of the motor above, it looks to me like ideal would be crossing the line at about 7500 RPM in fourth - I would find a way to change the gearing to do that if it were me.

For a psychotic comparison, my twin-turbo Corvette (currently being set up by Lingenfelter), also a six speed, will be able to do 61 MPH in first, and a paltry 181 MPH in fourth (estimated top speed of car is about 235 MPH in fifth gear - I will never try it!!). Top gear has the motor lugging at 1550 RPM at 70 MPH. Even though it has a 7000 RPM redline, the gearing is steep as one can get away with it when having 7.0L displacement and full boost at 2000 RPM. With much smaller displacement and higher spools, we will always have to live with shorter gearing in the Subbies. On the other hand, a Subbie will hook on the road, while a full throttle take-off in the Vette would be, well, lots of tire smoke :o

A slight port job or mild cams would do wonders.

William, after 7500 rpm, what the stats on the turbo? Does it have more to go all the way?

Can you compare this setup to a GT35R w/ .82 and 1.06AR?

I respect you Qurit but I know something you and Cobb know.

Thanks for the kind words ;)

Quirt

is all this done on bobbleheads? haha sorry i had to. im running a crawford s3 no offense.

is all this done on bobbleheads? haha sorry i had to. im running a crawford s3 no offense.


Yes, you are 100% correct. We run the bobbleheads in all of our motors that use forged pistons :)

Quirt Crawford
www.crawfordperformance.com

A slight port job or mild cams would do wonders.

William, after 7500 rpm, what the stats on the turbo? Does it have more to go all the way?

Can you compare this setup to a GT35R w/ .82 and 1.06AR?

We do not have another dyno run up to 8000 RPM's yet. :)

Here is a graph of a GT35R and a GT30R overlayed over each other. They are both using .82 housing.

http://www.i-speed.us/dyno_results/temp/tempFile6060.php

There are a few things we are working on, to improve the top end. We do not expect these results for quite a while, as we have many other projects on hand currently.

Cheers,
I-Speed USA

the 35R spools faster?

the 35R spools faster?

Quirt looks like he answered the same sort of question you have on another thread that someone else asked.

http://forums.nasioc.com/forums/showthread.php?t=934170&page=2

ahh, makes sense. the 35R obviously suffered in topend.

Quirt,

I fixed the exhuast today and finally got to take the car for a spin. The thing just keeps pulling...... :banana: It's a blast to drive. It's a bit scary to drive in this rain, have to make sure your going in a straight line before you hit boost. Thanks again.

Sweet Bill,

So should I purchase Davis (wrxgone) heads from em lol .. they are fully reworked p/p valve all the crap ... maybe get 9K out of it lol ... j/k but I am next to tune that .82

Quirt,

I fixed the exhuast today and finally got to take the car for a spin. The thing just keeps pulling...... :banana: It's a blast to drive. It's a bit scary to drive in this rain, have to make sure your going in a straight line before you hit boost. Thanks again.

You are welcome :)

So you like the extended power band?... I found that it helps with the short gears in the STI gearbox.

Thanks,
Quirt Crawford
www.crawfordperformance.com

The extended power band is nice! It's taking me a while to get used to reving past 7k. I feel like I'm doing something wrong.

Sweet Bill,

So should I purchase Davis (wrxgone) heads from em lol .. they are fully reworked p/p valve all the crap ... maybe get 9K out of it lol ... j/k but I am next to tune that .82

To be quite honest Eric I am not sure what the total affects of porting the heads will have on the STi's. My guess is that it will help top end power, with the increased air flow, though down low torque might be hurt a little bit by slower velocity. For every action there is an equal and opposite reaction.

Cheers,
I-Speed USA

Porting the heads could also increase response since you're flowing the same amount of air just with less resistance (static efficiency)...untuned you'd see a drop in boost but a definate increase in hp/tq....now increase the boost. Wouldn't you gain quite a bit more power all around?

Editing because i thought of something over night.....

You could even do a port on the intake side and leave the exhaust side alone to try and find the right balance, right?

FYI,

Today I took my car to GT Motorsports to see what it put down on a "real" dino. #'s are were close to the Crawford calculated #'s. On the second pull it hit 436 HP. but i only have one sheet here so i'll just go off these #'s.

425.7 HP
400.9 TQ

On 100 oct.
26psi

*stock sti puts down 236hp

*we also noticed the the injectors were running anywhere from 87-97% duty cycle.

Though you all would like to know this info.

*I'm very happy with the car, and the service from the boys at Crawford & I-speed. Just want to follow up on the injector issue.

FYI,

Today I took my car to GT Motorsports to see what it put down on a "real" dino. #'s are were close to the Crawford calculated #'s. On the second pull it hit 436 HP. but i only have one sheet here so i'll just go off these #'s.

425.7 HP
400.9 TQ

On 100 oct.
26psi

*stock sti puts down 236hp

*we also noticed the the injectors were running anywhere from 87-97% duty cycle.

Though you all would like to know this info.

*I'm very happy with the car, and the service from the boys at Crawford & I-speed. Just want to follow up on the injector issue.
thanks for following up for us...what kind of dyno?

FYI,

Today I took my car to GT Motorsports to see what it put down on a "real" dino. #'s are were close to the Crawford calculated #'s. On the second pull it hit 436 HP. but i only have one sheet here so i'll just go off these #'s.

425.7 HP
400.9 TQ

On 100 oct.
26psi

*stock sti puts down 236hp

*we also noticed the the injectors were running anywhere from 87-97% duty cycle.

Though you all would like to know this info.

*I'm very happy with the car, and the service from the boys at Crawford & I-speed. Just want to follow up on the injector issue.

Thanks for the kind words :)

All in all, what were their impressions of your STI?


Quirt