Injector/fuel rails

[ecld_07]

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?

[farmtruc]

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.

[ecld_07]

Would you use the FAST rails again or another company?

[farmtruc]

I use rails that fit the intake on most applications.
What intake are you using?

[ecld_07]

L92 truck intake right now

[DBRODS]

For E85 go as big as you can.

[farmtruc]

L92 truck intake right now

not sure if any rails fit it, might wanna check out the Fast LXRt rails, for that intake.
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.

[ecld_07]

For E85 go as big as you can.

Kinda what iv heard. I guess the next question is the 85lb one worth the $200 more over the 80lb?

Thanks Allen. I'll look into that

[DBRODS]

Kinda what iv heard. I guess the next question is the 85lb one worth the $200 more over the 80lb?

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.

[sprayedenali]

if it were me id do fast rails, 120lb injectors with the acceleronics box......