Quote:
Originally Posted by DorkMissile
Sorry this took so long to come full circle, just remembered to post this data after saving some log files.
Did some pulls tonight (1433DA), nothing on the setup has changed. 3rd gear roll-in from 55mph, shift to 4th and back into full WOT.
Rail Pressure holds north of 2000psi for about 9s, then will nose to 1850 before the shift. Back up to 2800 and will taper slightly until redline in 4th with pressure above 2000. I wouldn't want it to get any lower in 3rd.
I feel that I am pretty much max capacity on E85 on LT4 fueling, but it would be hard for me to get the fuel rate up high enough in the lower gears to run out of pump, and it would be hard to do a pull long enough to nose the pressure over in a gear higher than 3rd. Redline in 4th is pretty much 145mph.
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If you have an LT4 fuel system your high side fuel pressure should never drop below 2900 PSI or you are asking too much of it.
You also have to look at your injector opening time should not exceed 6 milliseconds.
You will see injector opening times jump up when high side pressure falls.
Low side pressure should maintain min 60 psi or 400 Kpa.
Ted.