EFI stainless steel hardline project

[INTMD8]

Originally Posted by eamblk50

I have run this configuration in braided ss for years with great success. Im really afraid to make a change at the risk of damaging my combo. This is a supercharged engine making approximately 1100-1200 hp. Using a magna fuel 750 protuner pump.

Fair enough but fwiw I've made 1100+rwhp on several occasions with efi and a 3/8 feed line.

I wouldn't bother trying to fit a 5/8 feed with EFI unless I was aiming for 3000+hp.

Understood if you don't want to change it but just thought I would mention that it's way overkill.

[parsonsj]

Originally Posted by Carl

What wall thickness do you use?

I use .035 wall tube. I used to buy 16 foot lengths, but now I can only buy 6' lengths. The really soft aluminum coils you can get at Summit work fine too, but straightening it can be difficult.

[eamblk50]

I set the braided system up on advise from Aeromotive years ago. Its a 10 feed and 8 return, would this equate to 5/8 and 1/2 hardline? Magnafuel recommends the same -10 feed and-8 return for my combo in ss braided. Are size requirements less for hardline??

Originally Posted by INTMD8

Fair enough but fwiw I've made 1100+rwhp on several occasions with efi and a 3/8 feed line.

I wouldn't bother trying to fit a 5/8 feed with EFI unless I was aiming for 3000+hp.

Understood if you don't want to change it but just thought I would mention that it's way overkill.

[eamblk50]

Just to make sure were on the same page the 1/2 and 5/8 are OD sizes.

Originally Posted by INTMD8

Fair enough but fwiw I've made 1100+rwhp on several occasions with efi and a 3/8 feed line.

I wouldn't bother trying to fit a 5/8 feed with EFI unless I was aiming for 3000+hp.

Understood if you don't want to change it but just thought I would mention that it's way overkill.

[INTMD8]

Originally Posted by eamblk50

I set the braided system up on advise from Aeromotive years ago. Its a 10 feed and 8 return, would this equate to 5/8 and 1/2 hardline? Magnafuel recommends the same -10 feed and-8 return for my combo in ss braided. Are size requirements less for hardline??

You are correct on the size correlation, (-10 being 5/8 and -8 being 1/2).

The size requirements are not less for hard line.

Not sure why both of those companies recommended that size, would only make sense to me if it was a low pressure carbureted system. (what would they recommend for that, -20?)

The cars with the 3/8 feed line were 4th generation f-body's with the stock fuel feed line (3/8 OD) at 1100+rwhp, so even if you went -8 feed it would be overkill.

Again, do whatever you feel comfortable with, just sharing my experience that you can easily meet your goals with much less feed line.

[eamblk50]

Thanks for the input, i have always wondered if i could choke the lines down. Lets hear a little more on the combo, ie cubes, power adder, fuel pump, injectors etc...Big wheel HP makes them sound cool already!

[INTMD8]

Originally Posted by eamblk50

Thanks for the input, i have always wondered if i could choke the lines down. Lets hear a little more on the combo, ie cubes, power adder, fuel pump, injectors etc...Big wheel HP makes them sound cool already!

A few were 402-408ci LS motors with twin 67mm turbos, 1150rwhp.

One was 370ci and ran 8.30's at 165mph in the 1/4.

Most were twin walbros with a boost a pump and 96-120lb/hr injectors and stock 3/8 feed line.

We do have one car with a -10 feed line that runs 205mph in the 1/4. At 3215lbs that's around 2000hp.

(I work for a shop that specializes in turbo LS setups)