BennyB

iTrader: (12)

what is everyone running on their big inch setups as far as injectors and fuel pump and plumbing? Im curious because I got the tank dropped and need some input on this because I havent got a clue.

BennyB

iTrader: (12)

What do you guys think about a walbro 450 in tank pump, 80lb deka injectors and stock fuel line? Would this setup be enough on e85 making 620+ to the tires?

BennyB

iTrader: (12)

Also would a fuel pressure regulator be needed. I forgot to mention I already have a Hotwire kit as well

Nostang

iTrader: (4)

I would go with a Weldon pump, filter and regulator for a setup like that and run some 12 an to the pump and 10an to the rails. See attached.

http://media.wix.com/ugd/79966d_e730...a567fc0344.pdf

I would guess that would make 700+hp and on E85 the fuel flow requirement is higher. I wouldn't skimp on the fuel system for a setup like you have. It will be one of the last fuel pumps you will ever need for any future combos.

BennyB

iTrader: (12)

I would love to do that setup and I am a firm believer in doing things once rather than twice, but on the other hand the budget is getting tight on my build right now and figured the fuel system is something that I could easily go back and upgrade in the future. I guess what I'm saying is I want opinions on what you would think could get me by for awhile.

Nostang

iTrader: (4)

Gotcha, I would estimate you need to have enough fuel for 800hp. No reason a race setup 13.8-1 compression 441LSX can't make 1.8hp/ci. I am pretty sure the stock lines are 3/8 or 6an size. I would be hesitant on running 6an on 800hp. It has been done with a double pumper setup on turbo cars but I would be inclined to go with bigger lines from the pump to the rails and larger fuel feeds. The Weldon setups are not cheap for sure but they are the best. Hate to see you spend money twice.

You could do a double pumper setup and have the 2nd pump come on with rpm. You would be fine with a single 255 at lower rpms under 3000.

http://www.lonniesperformance.com/fuelsystems.htm

The Walbro 450 looks to flow ~350-400lbs/hr @ 50 psi (12v vs 13.5v). Using quick math splitting the difference 375/.7 (BSFC for N/A E85 high side)=535chp...using the low side 375/.63=595hp. Not sure if the Walbro 450 will be enough for a 700hp setup like yours.

Read here for more info

http://www.enginelogics.com/confirm-your-dyno-results/

I would still get some fittings and run a bigger feed line if you go with a dual pump setup. That should get you by as long as you keep it N/A. The E85 requirement is the kicker as you need 30% more flow.

JoeNova

Look at what the turbo guys are doing for fuel systems at your power level.

The Walbro 450 pump tops out around ~650 HP at the wheels on E85. The problem with the pump is finding the best balance between flow/pressure. Since most people run Deka 80s with this pump, it ends up being a balancing act. Increase pressure to get more power from the injectors, and then your pump becomes the limiting factor. Run low base pressure to get more flow out of your pump, the injectors become the limiting factor.

Deka 80s top out around 800-850 HP at the wheels on E85 with static 58 PSI pressure. Again, they've been pushed to 1000 HP with enough fuel pressure.

-6 line flows enough fuel for gasoline to make 1500 HP at 100 PSI of fuel pressure (it has been done several times).
The schematic showing dual -10 lines going into the rails is similar to what the Pro Mod guys run to make 4000 HP on methanol (8000 HP worth of gasoline flow).

-8 feed/return is enough to support 1500 HP on E85 at a modest fuel pressure.

For 620 wheel, a Walbro 400 series (part number ending in 267), deka 80s, and a -8 feed/return is a cheap/reliable fuel system.

BennyB

iTrader: (12)

A lot of good information in here and I really appreciate it guys. I got a lot to think about here