Quote:
Originally Posted by Joshinator99
LPE injectors are +52% which is a big jump in output over the FIC at +30%, no? Based on the datalogs from my last dyno time, I believe I can run full E85 at my current 900+ WHP level. IPW was only 5.1 on E50, and only 2175 psi commanded rail pressure. Plenty of wiggle room on both fronts IMO.
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The 700whp statement was based on a stock engine with stock cam. With a 38 or 42% fuel lobe I would think 800-850 on full E at LT4 pressure with the +30's. My brother is running them on his Z06 and has enough fuel for E60 @ 16psi of boost on his H/C 2650 setup. If he went to the +60 then I think he could run whatever E that the pump offers which is normally E78 around here.
For my setup I think they would be fine and I can also get the FIC for less then half of the LPE +52% but that doesn't do you any good if they won't meet your fuel needs. I believe the +60's were still less then the LPE's but I don't see them available right now.
Couple things to note. Your injector MS will go up .5 every 10% you move up in Ethanol content.
The LPE injectors will start to misfire if you crank the rail pressure up as they are designed around LT1 fuel pressure and don't like much over 2400psi if I remember correctly. The FIC's can handle up to 3200psi without misfire.
The LPE DI pump is also designed around LT1 fuel pressure but it seems to be stable up to 2900psi. Word is the LT4 pump has been tested to 34 or 3600psi and produced more fuel headroom. However the LT4 pump will only handle a 38% lobe where the gen 2 LPE will work with a 42% lobe. Everything seems to be rated around a specific pressure and not how they perform at max sustainable pressure.
Wish I had the time to test all this stuff on my own because a lot of the data out there is as clear as mud. From what data I have seen I believe the LPE gen 2 pump with 42% fuel lobe, FIC +60's @ LT4 pressure, and a good low side should handle 1000whp on full pump E.