Evening Gents,

I was hoping to get some input on the fuel system I’m planning out for my turbo LQ4 build.

The goal is 750-800whp in a street/strip 88 Foxbody, mostly street. I’m aware that that’s more than enough power to get in trouble on the street and that 600 would more than suffice, but I’ve had two 600whp cars, I’ve grown bored of that power level and 750-800 is my goal and I would like to stick to it.

The motor is finished, I’m just ordering up the fuel system components now but want to make sure that what I order will match my goal so that I only have to do it once. The chances of me raising the bar again over 800whp is extremely unlikely so I don’t need anything too overbuilt, just a nice setup to match my goal.

I’ll outline what I have planned theoretically and hopefully you guys can give me input as to whether it will be enough, not enough, too much, etc.

-Aeromotive 525lph In-Tank Pump

-10AN from pump up to a Y-Split, with two -8AN lines to the back of each rail

-8AN lines from the front of each rail to an Aeromotive A1000 Boost Referenced Regulator

-8AN return line from regulator back to the tank

-100lb Holley Terminator X Injectors (40mm length)

my concern is mostly the pump size and whether or not that’ll be enough. Correct me if I’m wrong, but 100lb injectors should be plenty for my goal right?

also I’ll be using the Holley Terminator X Max for engine management and after reading the instructions online, it appears that I would have to run 60psi but it doesn’t specify if that’s just for the closed loop learning which wouldn’t matter for me because I’ll be getting a custom tune.

I appreciate any help you guys can offer and if you need me to clarify anything let me know

 

What fuel do you plan to run?

 

"it appears that I would have to run 60psi but it doesn’t specify if that’s just for the closed loop learning".
Learn is not dependent on the fuel pressure. If set up correctly, it will learn at the fp you use.
The tune will require your input on the inj size @ it's rated psi, & the actual system pressure. The program will calculate inj flow based on this info.

 

93 octane pump gas

ok I understand now thanks. The instructions were confusing because they said “the pump should be capable of supplying 255 liters per hour or 400 lbs per hour of fuel at the Terminator X System requirement of 60psi.” But like you said, you can input your desired pressure. I would only use the Holley self learn to get the car to idle and drive up onto a trailer to take it to get a real tune.

 

So any input guys? Does this setup sound adequate for my goals or does it need work?

 

A couple observations.
800 at the wheels is at/close to 1000 at the crank.
@60psi the pump amp draw is over 20A. Be sure you elec system can handle that.
@60psi the flow drops to 115GPH.
Using a BSFC of .6, which may be high, depending on the engine design and airflow characteristics.
Fuel at 6.5#/gallon.
Calc says the fuel consumption is about 92gph.
On 93 octane it's going to need a good air cooler and maybe some alky inj.

 

thank you for doing the math for me. So that sounds like by your calculations, I would be using up about 80% of the pump’s rated flow. I plan on doing a 50/50 water/meth kit, apart from what the tune is accounting for, as added insurance.

as far as the amp draw, the plan is to run the pump off a relay going directly to the battery. The battery is in the trunk now anyway

 

URMW...
"as far as the amp draw, the plan is to run the pump off a relay going directly to the battery. The battery is in the trunk now anyway".
Make sure your wire is big enough and the relay is heavy enough.
Don't forget the ground side!

 

On pump gas, you should be okay... But can you hit your power numbers with pump 93? I'm looking for around 800-850 RWHP and I decided to go straight to E85 because I didn't think I could make it work on 93. My fuel setup is twin Racetronix 340's with -8AN feed and 120 lb. hr. injectors, which should be more than enough for what I'm doing.

 

A little update to this thread and looking for some more guidance. I bought all my fittings and have the following ready to go:
tbss intake
Holley Rails
Holley 120lb injectors
-8AN fittings on front and rear of rails
-8AN 90* Fittings on front of rails running to each side of the aeromotive regulator
-8AN hoses from rear of rails to a dual -8AN to -10AN Y-fitting for the feed

I bought the car as a roller Foxbody and it already had an AN hose leading from the fuel pump to the front of the car, I thought it was an 8AN by looking at it quickly but after checking it out more closely last night it turns out it’s a 6AN. It’s too small to use as my feed, but would it be an issue running it to the bottom of my regulator as a return? Or should I just rip it out and run the 8AN return? If it would suffice it would save me a good chunk of work and money as opposed to running a new return line along with the 10AN feed I already have to run, but if it’s borderline or way too small I’ll just bite the bullet.

 

Lines are plenty big. I run 6an on the feed at only 40psi with e85 around 600whp. Others have ran 6an well over 1000hp

 

It does need work

 

Then be a little more helpful. What does it need?
Do a bit more than jacking your post count.

 

great thanks super helpful

 

congrats on your 10th post, also super helpful

 

Sounds like there's 2 ******** that are posing as trolls....

 

Well I went with the Holley 525 in-tank top hat and hanger setup, 10AN feed to aeromotive 10mic filter housing, 10AN to y-splitter, 8AN to the rear of rails. 8AN from front of rails to a1000 regulator, 8AN return to the tank. Holley 120lb injectors. Hopefully this will suffice. The lines, rails and injectors I’m pretty sure are plenty, just hoping the 525 pump keeps up.