Quote:
Originally Posted by JANNETTYRACING
As I explained before, the Stock LT4 fuel system can support 670 RWHP on E-60 so if your power goal is lower then you could run higher e content.
A cam will extend the range of the LT4 fuel system to about 750 RWHP on E-60
If you are shooting for 800 on E-85 then keep the parts and install them just keep in mind you will need a much larger super charger and forged internals.
Ted..
|
He has a LT1 not a LT4...LT1 cam has a smaller fuel lobe to drive the HPFP which I am sure you know... just putting this out there for those that don't. Back when you were testing a SS with Whipple you said the limits of the LT4 fuel system was 620whp on E60.
https://www.camaro6.com/forums/showthread.php?t=502348
Quote:
Originally Posted by JP374
So I recently picked up some +30 injectors and a LPE HPFP to try out. I’m hoping I will be able to get away with pump e85.
I’m getting mixed reviews now on the lpe and +30’s. Some are advising me to not install them and others say I will be good to run pump e85 with stock cam. I know KingLt1 runs them with good results. Are there any others running them with stock Lt1 cam? I’m looking to be around 625 whp or so until I do a cam swap. I currently have LT4 stuff with DSX pump. End game is 750-800 whp after cam and forged internals but that’s down the road.
All of this started when I called FIC to get injector data, Bob over there told me it’s very complicated to run the +30 injectors with lpe pump on an Lt1 and that if not setup proper will fail. I called lingenfelter and they told me I would gain very little if anything at all with stock Lt1 cam with the LPE pump over stock Lt1 HPFP. I then reached out to Chris @ Crawford and he highly advised not to run the +30 and LPE pump. He never did give a reason.
I want to avoid meth and just want to be able to run pump e85 @ 7-9 psi
Thanks JP
|
Just to be transparent...I haven't ran +30 injectors and LPE pump on a stock cam LT1 yet. I said per our PM that I am running LT4 injectors and LPE pump. The LPE pump seems to give us similar fuel headroom as a stock LT4 since our cam fuel lobe is smaller. I plan on installing a set of XDI +30's to hopefully get from E40 @ 11psi to back up around E60. It might be a waste not sure yet.
However As I already mentioned to you via PM these fuel mods set you up for the future when you do that cam. You said you planned on doing a cam in future, So it doesn't make sense to spend money twice and why I recommended what I did. If you were just going to stay around 600whp then the LT4 stuff would be sufficient.
Either way Brett @ Pray performance has used the +30's and LPE pump on stock cam ZL1's with good results. He hasn't done any SBE LT1's because he refuses to boost them..but he has stock cam ZL1's making 700whp + on full pump E with that fuel system. I don't see how .5mm of fuel lobe difference between LT1/LT4 cam makes it any more difficult to run +30 injectors with LPE pump. I would definitely want some specific detail on that before I believed it.