Hi chaps,
It seems whenever I take my car to the local track (Barbagallo), I experience the following:
fuel surge when tank is approx <60% full
high fuel consumption - roughly 6 laps will consume 1/4 of the tank
Additionally, when at the tuners, they said that the injectors are maxed out; they're not completely sure what the reason is. Initially it was believed to be a lazy pump, however after swapping that out, it seems to still be the same.
My fuel setup (and other possibly pertinent information) is as follows
R34 GT-Four (not sure if they run a different style fuel tank, or smaller fuel hosing, given it used to be an N/A car from factory)
RB26DETT
Approx 515hp on a hub dyno, which is usually reading a bit higher than roller dynos
Running E85
Deatschwerks 1200cc injectors
Walbro 460lph intank fuel pump
Standard fuel rail and FPR
Unsure of fuel filter, I don't think it's anything fancy, but has been changed a couple of times since switching to E85
Since swapping fuel pumps, not completely sure if the surging is still present, as I kept the fuel topped up each time I went out; however the workshop said the previous pump was secured well, and was low down, so there was no reason for it to surge previously.
I am considering putting in a fuel surge tank, -10 micron filter, new fuel rail and an adjustable FPR to try and fix all the above items, however just wanted to see if someone has any ideas before I embark down this road.
The other strange thing is that I know another car which is exactly the same fuel pump and injectors as me, however is sitting at 100hp more with breathing room on the injectors, and another car which has same injectors (different fuel pump), but is over 700hp
Thanks!