Lets talk REAL fuel systems for 600+ WHP....

Sounds like a good deal, I will consider this when I have you put a NOX setup on my intake for me. What is the maximum HP that you can put through the setup you have on your truck?
 
yellowfever#154 said:
Sounds like a good deal, I will consider this when I have you put a NOX setup on my intake for me. What is the maximum HP that you can put through the setup you have on your truck?

300+ on the two nozzle system, but you would need to check plugs (like any FI) to be sure of even distribution. For consistent 300+ direct port would be a better option though (I can do that to).

I dont have any pics of the dedicated fuel system that I was describing. The fuel cell would be similar to Jacks though.
Justin
 
Do you have any examples of some direct port injection systems that you have done? Will it look similar to Jacks? I like the idea with the solenoids mounted on the rear so they are not as noticable, except for having to work on them it would be difficult Im sure. What kinda price difference are you talking between the 2 nozzle system to the Direct port? Also what are some advantages of direct port over the other style? I think I know but want to hear it from someone who knows NOS.
 
Justin I'm considering going E85 is your fuel system compatible? If so, would you recomend going going dual or triple pumps?
 
Yes everything is E85 compatable, pumps depends on power level you are trying to acheive, dual pumps would most likely be fine for a paxton setup but I would spend the little extra while your in there just to be 100% safe and leave room for growth.
 
since the stock fuel system is boarderline for 600+ h.p., then the dual pump in tank set up with what size inj. would be needed for a N/A 650+ build ?????
 
since the stock fuel system is boarderline for 600+ h.p., then the dual pump in tank set up with what size inj. would be needed for a N/A 650+ build ?????

69lb+ @ 58 psi, or higher. (sold as 60 lbs @43.5 psi). There are plenty of injector calculators out there. Use 80% as your max duty cycle and 58 psi flow rates for your calculations to meet a specific HP.

My 95.8 lbs @ 58 psi (84 lbs @ 43.5 psi, sold as 80 lbs) are working fine at idle and higher so far. Only about 50 miles on them so far. Haven't had much of chance to drive but did some tuning with the VEC and a handheld scanner.

Had to scale the injectors and use some injector offset for the idle. I can help anyone with a VEC if needed.
 
Here's one:
http://www.witchhunter.com/injectorcalc1.php4

Say you want injectors for 700 HP at flywheel.

I used 0.55 BSFC (a good number would be 0.45-0.60)

Max duty 80%.

Gives you 48 lbs @ 43.5 psi. (*not @ 58 psi, but the standard is 43.5 psi as a guideline)

Now go to fuel flow calc.

Input 58 psi as new pressure and put 48 lbs in old flow rate to give 55.4 lbs @58 psi.

In turn, 800 HP would req 55 lbs @ 43.5, or 63.5 lbs @ 58 psi.
900 Hp would req 61.9 @ 43.5, or 71.5 lbs @ 58 psi.
1000 HP would req 68.8 lbs @ 43.5 psi, or 79.4 lbs @ 58 psi.

**lbs are actually lbs/hr as a flow rate
***HP at crank not wheels. Usually about 18-22% loss in our trucks to wheels, ballpark figure.

Others will probably chime in, but these should get you close to what you need. Somebody can double check my numbers or with another calculator.
 
thanks for the info:rock::rock::rock:

is there any worries of the stock fuel pump not bein enough if ya add billet fuel rails with the larger crossover line????:dontknow:
 
thanks for the info:rock::rock::rock:

is there any worries of the stock fuel pump not bein enough if ya add billet fuel rails with the larger crossover line????:dontknow:


Im running 11# boost and running out of fuel on stock pump under WOT:(
 
Justin... Great thread!
Would you recommend one or two wideband A/F meters and where in the exhaust would you install it/them?
Thanks,
Dan
 
thanks for the info:rock::rock::rock:

is there any worries of the stock fuel pump not bein enough if ya add billet fuel rails with the larger crossover line????:dontknow:

Rails arent the issue, its the pump not flowing enough.

Justin... Great thread!
Would you recommend one or two wideband A/F meters and where in the exhaust would you install it/them?
Thanks,
Dan

I typically only run one and anywhere before the cat is fine, close to the header collector is preferred. Two is great if you want to spend the extra money, never hurts to have engine information!
 

Latest posts

Support Us

Become A Supporting Member Today!

Click Here For Details

Back
Top