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Old 10-27-2019, 10:15 AM   #1
Mi04sti
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Default Fuel setup for 650whp to 700

I have a 04 sti with iag stage3 tuff block with built stock heads 272cams running 5857 turbo id1300, single 450 hardwired 6an feed and stock Return.. currently at 550whp but is craving for more hp. I now have a 6266 gen 1 bb turbo and plan on running id2000 my car is street driven no track my goals are 650whp-700 what is my best route I could go on fuel delivery to achieve this power level without breaking the bank. Thanks in advance
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Old 10-27-2019, 12:21 PM   #2
bp05obxt
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Double pumper. Primary AEM 340 pump and use your 450 pump as secondary. Iwire fuel pump controller wiring kit for double pump I tank setup. Not necessarily cheap when considering all of the parts involved, but it isnít cheap to do a proper fuel system unfortunately.
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Old 11-12-2019, 07:54 PM   #3
imma_stocker
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What kind of fuel?

Max boost?
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Old 11-19-2019, 04:14 PM   #4
Wfosti35
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Quote:
Originally Posted by imma_stocker View Post
What kind of fuel?

Max boost?
Yes, what fuel? Iím considering building up my 04 sti and would love to know what a stage3 iag motor is capable with 93 pump fuel.
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Old 11-19-2019, 07:08 PM   #5
Homemade WRX
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Some of the brushless stuff is looking wildly capable for single pump set ups.
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Old 11-20-2019, 06:11 PM   #6
Dave D.
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06 Red Ltd.Wagon
Dom 1.5xtr JJ tuned

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Quote:
Originally Posted by bp05obxt View Post
Double pumper. Primary AEM 340 pump and use your 450 pump as secondary. Iwire fuel pump controller wiring kit for double pump I tank setup. Not necessarily cheap when considering all of the parts involved, but it isn’t cheap to do a proper fuel system unfortunately.
My tuner did this, after the in-tank 340 couldn't keep up. He put the 450 E-85 pump/surge tank on the right front fender, pulling power from the deleted air pump circuit. Although I'm more like 400whp on E-70 (1300cc injectors) it made the fuel delivery incredibly consistent. With the new setup the car picked up 30whp/tq and about 2mpg due to consistently vaporized fuel delivery from the injectors. The fuel pump never runs more than 66% capacity.
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Old 11-21-2019, 07:21 AM   #7
BlueSTI4Me
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Following.
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Old 11-21-2019, 10:39 AM   #8
JarHarms
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Quote:
Originally Posted by Dave D. View Post
My tuner did this, after the in-tank 340 couldn't keep up. He put the 450 E-85 pump/surge tank on the right front fender, pulling power from the deleted air pump circuit. Although I'm more like 400whp on E-70 (1300cc injectors) it made the fuel delivery incredibly consistent. With the new setup the car picked up 30whp/tq and about 2mpg due to consistently vaporized fuel delivery from the injectors. The fuel pump never runs more than 66% capacity.
I had always considered that leftover circuit would be a perfect candidate for powering a 2nd fuel pump if engine bay mounted. Do you have any specifics on how that circuit was modified? Did your tuner tie a boost/rpm/etc reference trigger into the air pump relay control circuit? Any pictures?
At (F127) the B+ to the 2nd air pump is controlled by the ECM through a (F129) relay located in the engine bay fuse box. GND to the 2nd air pump is strait to chassis ground. I do not believe there is any ATR or OS definitions existing to modify when the ECM activates that circuit. Pretty doubtful Denso software even has strategy structure that will tie the 2nd air pump to MAP or RPM values. So that leaves us with "highjacking" of the existing chassis circuit.

I also agree that the brushless pumps are looking like great candidates. Just a bit spendy right now and require a separate controller to function.
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Old 11-21-2019, 05:14 PM   #9
Dave D.
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Dom 1.5xtr JJ tuned

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Quote:
Originally Posted by JarHarms View Post
I had always considered that leftover circuit would be a perfect candidate for powering a 2nd fuel pump if engine bay mounted. Do you have any specifics on how that circuit was modified? Did your tuner tie a boost/rpm/etc reference trigger into the air pump relay control circuit? Any pictures?
I don't have the specifics, although I could put up a picture. You could try contacting Infront directly, they might even be able to put together some kind of a kit or package for you.

https://www.facebook.com/JohnJohnTuned/
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Old 11-21-2019, 08:13 PM   #10
JarHarms
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Quote:
Originally Posted by Dave D. View Post
...
Reply appreciated. I'll figure something out and will use your post as motivation.
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