Quote:
Originally Posted by dremd
2 things
1) TBI runs at very low pressure (like 10psi.
2) Injectors do hit a wall on running higher pressures, some more than others.
|
Okay, good to know. The theory would still hold true. If your stock pressure was 10psi and you wanted to increase your fuel flow 30% (for E85) then you would need your fuel pressure to be 17psi, which the TBI injector should not have a problem with. For flowrate vs. pressure calculations, to increase the flow rate by 30% you need to increase pressure by 70%. So, bottom-line, take your stock fuel pressure, and multiply it by 1.7 to get the fuel pressure needed to run E85. You can definitely get away with less, as the O2 sensor and ECU will pick up the slack, however for cold starting (open loop running) it's better to go with the 30% flow increase. I was running ~17% flowrate increase for a few months with no real problems, however when I bumped it up to ~30% increase cold starts were much smoother.