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Id like to know exactly what fuel pressure returnless NB's have.
I understand that they are pressure referenced, Id like to work out what I can make with maxxed 725's on E85.
I understand that it is 60 psi, can somebosy please confirm? I have an NB8B which is fuel limited at 230whp with RX8 yellows, which seems very low... I should buy a fuel pressure test rig for my dyno.
Thanks,
Dann
I measured the pressure at the rail with a mechanical gauge.
With FIC 650s, the rail held 58psi @ 20psi boost to 7400rpm with the stock fuel pump.
I measured the pressure at the rail with a mechanical gauge.
With FIC 650s, the rail held 58psi @ 20psi boost to 7400rpm with the stock fuel pump.
Damn..Thats great news! Now I need to find an e85 compatible, stock sized fuel pump. Then I should be on my way to e85 on stock fuel system with 610cc injectors...i think
So I'm having this same dilemma (might call it that??) Also yes a necro thread I'm good at that. Anyway, I too have a returnless fuel system nb1. I've got FIC 1000s and in trying to determine if my required fuel is correct. Or even my deadtime. I question this because the car wants larger ve numbers around 80-86 at idle and anywhere from 70-92ish during high rpm low load cruise. Is this an indication that something is off or just go with it? I have the injector data sheet and I asked fic what to enter in the ms2 because I'm limited to what I enter. I was told at 58psi the injectors have 1190cc of flow and a deadtime of 1.178 with .180 correction. But the injector data sheet shows other numbers. I entered the data above for my settings and got a required fuel of 2.6. Here is the info if anyone cares to confirm it is correct.
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