Printable View
What injector are people running to support 800ish hp systems? I will be on e85 so that seems to need a bigger injector. Iv seen 80lb ones are popular but iv also been told the bosch 900cc ones would be better and be around 85lb. So which one, or a different one would be the best? Also are guys still running stock fuel rails or going aftermarket?
I can comment on fuel rails from personal and customer experience.
'08 408/heads/cam/80e, we did a twin pump in the tank.
Stock fuel rails, but with external regulator and return line.
Truck has 78lb inj.
Truck was tuned just right, a/f ratio around mid 11's on 12psi.
Installed an Edelbrock proflow intake, and supplied fuel rails.
After install, so much more volume was flowing, I had to remove about 30% fuel from the VE table.
Fuel rails help tremendously!!! Do the fuel rails, they flow much better, distribute fuel better, and hey they look cool :)
Fuel rails can cut down the injector duty cycle a lot!
Same thing on my TT'94 truck, when from stock truck intake and rails to ls intake and FAST rails, much better.
Plus, I didn't see fuel pressure variation with the new rails.
Would you use the FAST rails again or another company?
I use rails that fit the intake on most applications.
What intake are you using?
L92 truck intake right now
For E85 go as big as you can.
not sure if any rails fit it, might wanna check out the Fast LXRt rails, for that intake.Quote:
Originally Posted by ecld_07
Cause, they say the factory fuel rails fit the FAST truck intake, so it must be the other way around too, the FAST rails fit the stock L92 intake.
Kinda what iv heard. I guess the next question is the 85lb one worth the $200 more over the 80lb?Quote:
Originally Posted by DBRODS
Thanks Allen. I'll look into that
I would do bigger than a 85lb. Figure 40% more fuel WOT with E85. Thats the only drawback we have found with E85 is the fuel supply needed to run it. Injectors start getting pricy up there, you could always go with a low imp and a driver box.Quote:
Originally Posted by ecld_07
if it were me id do fast rails, 120lb injectors with the acceleronics box......
Go big or go home better safe than sorry leaves room for more fun later
I remember seeing a turbo GMC at the S.A. shooutout that had the stock intake and using fast fuel rails. Dont know which ones though.
I don't mind going big. But can't you go big enough that it's actually hard on the injectors because under useage? Like cruising around 90% of the time.Quote:
Originally Posted by sprayedenali
Does fast make a truck intake for the square port heads? Iv looked and can only find the intake for the ls3 or for cathedral port... will the fuel rails that fit an ls3 intake fit the l92 intake?Quote:
Originally Posted by farmtruc
If you look around you can find good deals on the High Impedance Injectors. I just got some ID1000's for a good deal on another forum. Just gotta look around is all. My plan is to run the corn too.
i got a good set of injectors but the rails are what are holding me up