Here is a quote from the APS site:


"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"

http://www.airpowersystems.com.au/us_spec/subaru/sti/2004_sti.htm


What? I go not get it? I think Red Rocket has an AVO on his car World One said they put a VF-22 on theirs for testing?


So who has put a turbo on there STI?


Bikerboy

The VF39 compressor outlet bends towards the back of the car so as to miss the DBW by about 1/2".

When you put a "normal" WRX turbo like VF22/23/30/34 ETC the hose from the turbo to intercooler touches the DBW a little. No biggy do and you want to know why.

The turbo forester has a straight compressor outlet from the factory and all that Subaru did was wrap the hose from the turbo to the intercooler with some sponge material because it touches the DBW.;)

FWIW
I find the 480cc injector size to be a surprize because I have been told 534cc. This info was supplied by the gentleman who decided what the Canadian STI will have/get here in Canada. I requested this back in April along with other info that has turned out to be completely accurate.

Makes me question APS numbers.
AZScoobie/god/shiv etc are posting upto 390hp on only 40cc bigger injectors than a WRX .:eek:I remember well the arguments that APS/Shiv/ Cobb had last year about injector size.

Originally posted by Wombat North
The VF39 compressor outlet bends towards the back of the car so as to miss the DBW by about 1/2".

When you put a "normal" WRX turbo like VF22/23/30/34 ETC the hose from the turbo to intercooler touches the DBW a little. No biggy do and you want to know why.

The turbo forester has a straight compressor outlet from the factory and all that Subaru did was wrap the hose from the turbo to the intercooler with some sponge material because it touches the DBW.;)

FWIW
I find the 480cc injector size to be a surprize because I have been told 534cc. This info was supplied by the gentleman who decided what the Canadian STI will have/get here in Canada. I requested this back in April along with other info that has turned out to be completely accurate.

Makes me question APS numbers.
AZScoobie/god/shiv etc are posting upto 390hp on only 40cc bigger injectors than a WRX .:eek:I remember well the arguments that APS/Shiv/ Cobb had last year about injector size.


Interesting, I'd like to hear more about the arguments?

Originally posted by bikerboy



Interesting, I'd like to hear more about the arguments?

Then you should seach for them....

Originally posted by Wombat North

Makes me question APS numbers.
AZScoobie/god/shiv etc are posting upto 390hp on only 40cc bigger injectors than a WRX .:eek:I remember well the arguments that APS/Shiv/ Cobb had last year about injector size.

FWIW, we're making ~260 wheel hp on our dyno with the injector running close to static (but not quite). This is closer to 360-370bhp, IMHO. We did make 280+whp with the stock injectors but that was with a race gas mixture which allows substantial enleanment of the fuel curve as well as a few degrees more advance. The latter totally screws up the BSFC calculations when doing injector math.

My 2c,
Shiv

PS. We're also finding out that we can safely run the STI substantially leaner than we could the 2.0. The combination of VVT as well as running a bigger displacement motor at lower boost (vs. little motor at higher boost) allows for this I suppose.

Originally posted by totoherbs


Then you should seach for them....


I just spent an hour looking over old threads and was not able to find the information. Any ideas or thread names?

Bikerboy

Originally posted by Vishnu Performance


FWIW, we're making ~260 wheel hp on our dyno with the injector running close to static (but not quite). This is closer to 360-370bhp, IMHO. We did make 280+whp with the stock injectors but that was with a race gas mixture which allows substantial enleanment of the fuel curve as well as a few degrees more advance. The latter totally screws up the BSFC calculations when doing injector math.

My 2c,
Shiv

PS. We're also finding out that we can safely run the STI substantially leaner than we could the 2.0. The combination of VVT as well as running a bigger displacement motor at lower boost (vs. little motor at higher boost) allows for this I suppose.


Excellent info Shiv! Have you tested the flow rate of the STI injectors? Have you found any uprated side feed injectors for our aplication yet?

Bikerboy

Originally posted by bikerboy



I just spent an hour looking over old threads and was not able to find the information. Any ideas or thread names?

Bikerboy

sorry should of told you. They are old as hell I think youd have to look in the archives.

bikerboy

Be careful with what you seek
http://forums.nasioc.com/forums/showthread.php?s=&threadid=203388&perpage=25&pagenumber=1

Call me stupid, what is the DBW?
thanks
byron

drive by wire....???

i knew it was going to be something that obvious.
Who has the picture of Homer?
DOH!!!

Originally posted by byroll01
i knew it was going to be something that obvious.
Who has the picture of Homer?
DOH!!!

go to google and look up homer... then just link the pic

http://www.digital-digest.com/newsletter/issue29/homer.gif