stock dyno #s by APS

maxwolfinger · 09-15-2003, 05:11 PM

http://www.aps-wrx.com/us_spec/subaru/sti/2004_sti.htm
APS found the STI to make 311 flywheel horsepower, there's a dyno graph on the site.

hughbob · 09-15-2003, 09:24 PM

I wonder what sort of corrections they're making from wheel to crank...

Agent Chobos · 09-15-2003, 11:38 PM

Quote:

APS has fully imported a US specification STI and complete engine for engineering and development purposes.

I think maybe they had the thing out of the car on an engine dyno. They wouldn't need any corrections in this case.

***staticx313*** · 09-16-2003, 07:32 AM

you think its because of the octane? I mean they said what they were running was equivilant to our 94. What does subaru make the power on? (91, 93, 94, etc)? If they did 300hp on 91, then 311 on 94 wouldnt be too far off I wouldnt think (especially since its crank hp).

Robert~

CloNeGTS · 09-16-2003, 02:38 PM

You'd think since they ask that 94 be used and that anything lesser is inferior that they used 94 in their tests as well.

Either way....kinda just backs up what a lot of us were thinking....that sucker is underrated!

Guru · 09-16-2003, 07:14 PM

That is about right. I estimated 308-310 HP at the crank myself. The EVO has 300 HP stock.

maxwolfinger · 09-16-2003, 07:48 PM

Quote:

Originally Posted by Guru

That is about right. I estimated 308-310 HP at the crank myself. The EVO has 300 HP stock.

in the UK with the FQ300 package it does

Yukonart · 09-17-2003, 12:11 AM

Quote:

Originally Posted by CloNeGTS

Either way....kinda just backs up what a lot of us were thinking....that sucker is underrated!

I'm all about that! 8)

Can't wait to do a baseline on mine after I break her in.

scubaru · 09-18-2003, 01:29 PM

Quote:

Can't wait to do a baseline on mine after I break her in.

Dude...we should hook up when you get your wheels? Are you an SCCA member?

titsataki · 09-19-2003, 01:00 PM

Interesting they have a Dyno Dynamics Dyno just like the one Vishnu uses (Shiv run my WRX many times there). Yet his entries are more like 218hp at the wheels. What do the folks at APS saw at the wheels?

Cheers

Nick

***eatV8*** · 09-19-2003, 02:48 PM

APS imported a complete USDM STi aswell as a USDM STi engine. there evo 8 (U.S spec) made 264.9hp using the same fuel and dyno. also they have started their research into the engine. APS products working with USDM STi: cool air intake, pod air intake, D/R 650 and 500 FMIC, all their exhaust systems and their BOV's... here is their initial findings...

The 2004 model US Specification STI is a unique model in many ways. Just some of those already identified are as follows:

Side feed 480 cc injectors (350 flywheel horsepower at 11.0:1 A/F ration, 100% duty cycle). This is in stark contrast to the International Specification vehicle with its 565 cc top feed units.
Although it does not appear at first sight to be so, the turbocharger's physical configuration is unique. No other VF Series turbocharger (nor current APS unit) will directly interchange.
In common with most VF Series units, the turbocharger is airflow limited to approximately 350 flywheel horsepower.
The stock ECU's operating software and loom hardware are unlike any other late model WRX.
As is quite well known, the throttle butterfly is drive by wire.
APS is by no means suggesting these are the only differences. Quite possibly more will come to light in due course. In the mean time, the following current production APS components have been proven to be applicable in enhancing the engine performance of the US Specification STI.

Guru · 09-21-2003, 01:51 PM

I disagree completely with APS's findings. The turbos can interchange and the flanges are the same. The unit can flow more than 350 crank HP. Hell, I got 375 crank HP with the stock puny intercooler and no engine management. APS makes some great turbos and IC's but I certainly do not agree with their findings.

***eatV8*** · 09-21-2003, 02:00 PM

they said around 350, they were going by how it has the same restrictor on it as all VF series turbochargers. as for the flange, i dont know why they couldnt get it to fit, i myself thought it would be wierd for IHI to suddenly change it on the VF series...

Yukonart · 09-21-2003, 06:20 PM

Quote:

Originally Posted by scubaru

Quote:

Can't wait to do a baseline on mine after I break her in.

Dude...we should hook up when you get your wheels? Are you an SCCA member?

Give me a few more weeks. . .

And not yet, although I did very well my very first time out on the autox course with the Civic almost a month ago. $2000 in suspension mods does a Civic good. Well, that and some very aggressive driving.

Just went to Champs Karting on Bothell-Everett Hwy last night (my friends took me there for my birthday) and I owned everyone on their course. Even pre-qualled for the turbo cars while I was at it. :P

Before we're told to take this to a PM conversation. . . I'll just leave my mobile number. . . we should hook up in the very near future and hang for a while.

Art
206.310.2885

09-15-2003, 05:11 PM	#1
maxwolfinger Senior STI Driver Location: Farmingdale, NJ Posts: 383 IWSTI Addict since: Jul 2003 Trader Rating: (0)	WTB: under MSRP white/gold no option STi (willing to travel) http://www.aps-wrx.com/us_spec/subaru/sti/2004_sti.htm APS found the STI to make 311 flywheel horsepower, there's a dyno graph on the site. This ad is not endorsed by this member. Please register or login to hide this ad.

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09-15-2003, 09:24 PM	#2
hughbob Junior STI Driver Location: Austin, TX Posts: 80 IWSTI Addict since: Aug 2003 Trader Rating: (0)	I wonder what sort of corrections they're making from wheel to crank...

09-16-2003, 07:32 AM	#4
*staticx313* Platinum Member Car: 05 Subaru WRX STI CG Fav Mod: 3" FP20G - 403WHP/417WTQ Location: Huntsville, AL Posts: 5,274 IWSTI Addict since: Aug 2003 Trader Rating: (2)	you think its because of the octane? I mean they said what they were running was equivilant to our 94. What does subaru make the power on? (91, 93, 94, etc)? If they did 300hp on 91, then 311 on 94 wouldnt be too far off I wouldnt think (especially since its crank hp). Robert~

09-16-2003, 02:38 PM	#5
CloNeGTS S204 Racer Car: Solo II, WRC Location: Overland Park, KS Posts: 2,776 IWSTI Addict since: Oct 2002 Trader Rating: (1)	You'd think since they ask that 94 be used and that anything lesser is inferior that they used 94 in their tests as well. Either way....kinda just backs up what a lot of us were thinking....that sucker is underrated!

09-16-2003, 07:14 PM	#6
Guru Senior STI Driver Location: Detroit, MI Posts: 356 IWSTI Addict since: May 2003 Trader Rating: (0)	That is about right. I estimated 308-310 HP at the crank myself. The EVO has 300 HP stock.

09-19-2003, 01:00 PM	#10
titsataki The Next Petter Solberg Car: 05 STI CGM Location: New Haven, CT Posts: 984 IWSTI Addict since: Nov 2002 Trader Rating: (0)	Interesting they have a Dyno Dynamics Dyno just like the one Vishnu uses (Shiv run my WRX many times there). Yet his entries are more like 218hp at the wheels. What do the folks at APS saw at the wheels? Cheers Nick

09-19-2003, 02:48 PM	#11
*eatV8* retired mod Car: 99 WRX STi V5 Fav Mod: JDM Air Freshener Location: Brisbane, Australia Posts: 3,861 IWSTI Addict since: Apr 2003 Trader Rating: (0)	APS imported a complete USDM STi aswell as a USDM STi engine. there evo 8 (U.S spec) made 264.9hp using the same fuel and dyno. also they have started their research into the engine. APS products working with USDM STi: cool air intake, pod air intake, D/R 650 and 500 FMIC, all their exhaust systems and their BOV's... here is their initial findings... The 2004 model US Specification STI is a unique model in many ways. Just some of those already identified are as follows: Side feed 480 cc injectors (350 flywheel horsepower at 11.0:1 A/F ration, 100% duty cycle). This is in stark contrast to the International Specification vehicle with its 565 cc top feed units. Although it does not appear at first sight to be so, the turbocharger's physical configuration is unique. No other VF Series turbocharger (nor current APS unit) will directly interchange. In common with most VF Series units, the turbocharger is airflow limited to approximately 350 flywheel horsepower. The stock ECU's operating software and loom hardware are unlike any other late model WRX. As is quite well known, the throttle butterfly is drive by wire. APS is by no means suggesting these are the only differences. Quite possibly more will come to light in due course. In the mean time, the following current production APS components have been proven to be applicable in enhancing the engine performance of the US Specification STI.

09-21-2003, 01:51 PM	#12
Guru Senior STI Driver Location: Detroit, MI Posts: 356 IWSTI Addict since: May 2003 Trader Rating: (0)	I disagree completely with APS's findings. The turbos can interchange and the flanges are the same. The unit can flow more than 350 crank HP. Hell, I got 375 crank HP with the stock puny intercooler and no engine management. APS makes some great turbos and IC's but I certainly do not agree with their findings.

09-21-2003, 02:00 PM	#13
*eatV8* retired mod Car: 99 WRX STi V5 Fav Mod: JDM Air Freshener Location: Brisbane, Australia Posts: 3,861 IWSTI Addict since: Apr 2003 Trader Rating: (0)	they said around 350, they were going by how it has the same restrictor on it as all VF series turbochargers. as for the flange, i dont know why they couldnt get it to fit, i myself thought it would be wierd for IHI to suddenly change it on the VF series...