how to make 450whp on e85 with stock location turbo

285 Views 10 Replies 6 Participants Last post by mheyman, 2 d ago

Tizzle04foresterxt

Discussion Starter · 5 d ago

Hi i have a 04 forester i want to be making 450whp on e85 there are some questions i have first because i am still confused on the fuel lines and everything.
i have a grimmspeed bb500 turbo
EJ25 getting forged pistons,rods, bearings, and sti crank.
getting full jdm sti 04 forester drivetrain swap, and clutch.
going for 1300cc IDs
have a 340aem lph
2007 sti tgvs/intake manifold and intercooler.
i’m guessing i need 6/8an fuel lines. ( i need links to what i need as for that because i’m a little lost in what i need to support 450whp/e85).
will i need the 2nd fuel pump too?
and which fpr
Thank you guys for the help.

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xpystchrisx

· #2 · 5 d ago

Radium Fuel Hanger (Pumps Not Included)

The Fuel Hanger For Walbro F90000267/274/285 is available for those who want to increase the fuel volume and delivery on the Subaru WRX.

www.rallysportdirect.com

I have a walboro 450 in a dual pump hanger.

IAG PTFE Fuel System Kit w/ Injectors, Lines, FPR, Fuel Rails

The PTFE Fuel System Kit will include the 2600cc Fuel Injectors to increase the fuel supply.

www.rallysportdirect.com

That's a kit for the STI that provides most everything you need for the engine bay.

As far as the rest of your questions I'm not sure.

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Tizzle04foresterxt

Discussion Starter · #3 · 5 d ago

Okay thank you that helps a ton, i did not know they made those kits and they would fit my 07 sti stuff? makes sense since there’s nothing that looks like wouldn’t fit

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Tizzle04foresterxt

Discussion Starter · #4 · 5 d ago

xpystchrisx said:
Radium Fuel Hanger (Pumps Not Included)

The Fuel Hanger For Walbro F90000267/274/285 is available for those who want to increase the fuel volume and delivery on the Subaru WRX.

www.rallysportdirect.com

I have a walboro 450 in a dual pump hanger.

IAG PTFE Fuel System Kit w/ Injectors, Lines, FPR, Fuel Rails

The PTFE Fuel System Kit will include the 2600cc Fuel Injectors to increase the fuel supply.

www.rallysportdirect.com

That's a kit for the STI that provides most everything you need for the engine bay.

As far as the rest of your questions I'm not sure.

also, do subarus have 2 fuel pumps standard? because when i switched mine there was 2 similar chamber things for the pump and i changed the pump on the right.

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Karlot

· #5 · 5 d ago

Tizzle04foresterxt said:
a

also, do subarus have 2 fuel pumps standard? because when i switched mine there was 2 similar chamber things for the pump and i changed the pump on the right.

No. They come with a single pump. You won’t need a secondary unless you’re tracking it at that level. And the second would be in a surge tank. 2 there means the hangar wasn’t stock.

fpr I vote radium.

iag makes line kits.

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JohnSub2013sti

· #6 · 5 d ago

To run E85 I think it's possible with just injectors, fuel pump and a flex fuel kit.
Below is everything you would need.... and then some.

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lidrew

· #7 · 4 d ago

I’m not familiar with your turbo, but For 450 whp running E85 you probably want bigger injectors 1650-1700cc and a 450 Fuel pump. I have spec’d a similar build with FP Green

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Karlot

· #8 · 3 d ago

lidrew said:
I’m not familiar with your turbo, but For 450 whp running E85 you probably want bigger injectors 1650-1700cc and a 450 Fuel pump. I have spec’d a similar build with FP Green

1300s will hit 450 on e. You don’t need 1700s for that. Same with the pump.

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JohnSub2013sti

· #9 · 3 d ago

Also with the bigger injectors your idle is rougher.

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Karlot

· #10 · 3 d ago

JohnSub2013sti said:
Also with the bigger injectors your idle is rougher.

*can be tougher. This is all in the tune. 1700s I have seen idle just fine. 2k is where the roughness tends to be. And even then it’s more of an annoyance than an issue.

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mheyman

· #11 · 2 d ago (Edited)

I was/am under the impression that "long ago" low duty cycle injector control and resulting idle problems were an issue with many injectors until ID resoled this and became popular . . . Today we can go bigger with no problem, but at some point how fast can a valve open and has limits and at that point a large injector to loose precise control.

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