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1000Ccs Maxed Out At ~500Hp? E85 + Walbro 460

TheGeniusMoose
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Kinkstaah
Kinkstaah

holy shit someone benefitted from my various miseries karma come at me any time now

GTSBoy
GTSBoy

Any time anyone says an AFR number when talking about E85, and the AFR sounds like a petrol AFR, then just pretend the fuel is petrol. It's that simple. No-one would tune to a real AFR of 11.9 on E8

TheGeniusMoose
TheGeniusMoose

Replaced filter, 80% duty in 3rd at 7500 rpm. Not sure how that compares to 4th gear on dyno however.

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Ben C34 Grand Master

Ben C34

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what he said ^^^ :)

mine were gonna be getting around the 100% around the 360kw mark with an E85 walbro pump so i upgraded to 2000cc inj. food for thought

Did you check and monitor fuel pressure on the dyno?

TheGeniusMoose Contributor

TheGeniusMoose

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So I've just taken this ryco filter out..

Cannot blow through it. It's clogged so bad it's not funny. As in, air goes in and doesn't come out the other side clogged .

kaneryan Rising Star

kaneryan

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from my experience hearing from people running E85 i dont think you get much change from 1000cc inj, after about 350kw :)

**** running E85.

is the guy that built your car running E85?

correct me if im wrong but running more fuel pressure you can use less duty cycle??

Kinkstaah Grand Master

Kinkstaah

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Posted

Replaced filter, 80% duty in 3rd at 7500 rpm. Not sure how that compares to 4th gear on dyno however.

This was my exact experience.

I have heard other people run into walls at ~330-370kw with mysterious fuel problems on R34's when everything else seems ok, replace the filter. At least on E85.

I upgraded to 1400's thinking my 1000's had maxxed out but found out that wasn't the case. 1000's on e85 seem to really get hairy at 400, though some people reckon they've done 450+ on them? Can never really have too much injector headroom nowadays anyway. Good enough excuse to upgrade :P

cobrAA Mentor

cobrAA

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Posted

Exactly, that is how we found the flow was dropping off. You have no idea what is happening without a gauge on the feed line, and you need to be on a dyno if the gauge is in the engine bay.

Speaking of which, it seems some factory regs can be too small for the 460L pumps, they don't bypass enough. The S15 I worked on recently was tuned at 60psi at idle, no wonder the car wouldn't idle well with twice the fuel pressure it should have had. It is definitely an important test that should be checked after any major fuel system mods.

are the nismo considered factory reg ?

scotty nm35 Grand Master

scotty nm35

Posted
Posted

No, they seem to work fine. I only realised the SR regs were too small after having idle issues on petrol after installing a 460L intank. Checked the pressure and found it way too high. Perhaps the RB's will be fine as there are 2 more injectors bleeding fuel pressure off...

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