HRHohio

Newb question here (newbie to fuel)... can we run a boost referenced fuel pressure regulator with stock LS1 Fuel Rails? (Not the billet rails...).

If so, how is that done? Or do you have to upgrade the rails to the billet ones.

Car: 2002 Camaro LS1 (sig)

Thanks!

JoshuaGrooms83

iTrader: (2)

thanks alot! now you got me looking for the same thing lol j/k.

in for the same question

JaYZeig

iTrader: (11)

if someone could answer this id be suprised...inless
you do some modification to the fuel rails, you would
need to somehow convert the rail to a return style
fuel system to incorporate the regulator.

thats all i got

JoshuaGrooms83

iTrader: (2)

found this, not sure how close it is for what we need, but i like how simple it is.
https://ls1tech.com/forums/conversio...mper-hole.html

cals400ex

iTrader: (27)

https://ls1tech.com/forums/fueling-i...ock-rails.html

HRHohio

Great Finds! I also found out that you can weld a line onto the end of the rail, but I like the idea of using the existing Schraeder valve.

JoshuaGrooms83

iTrader: (2)

yep absolutly! i didnt know that we already had 4an on our rails, thats gonna makeit SOO much easier. now just to figure out how to run the line back to the tank.

Old Geezer

iTrader: (3)

-4 return is all well and good....................As long as the system isn't flowing more than it can handle. Then, you can chase a rich condition, or?

JoshuaGrooms83

iTrader: (2)

for myself, im not looking at anything over 600hp. im pretty much limited to the ractronics fuel pump and 60lbs injectors that i will be using. if i ever get a wild hair up my butt for 800+ HP then ya, a complete revamp of fuel system would be in order to keep fueling safe. but for now, sticking to stock layout as much as possible. im not sure what size the stockish return size is but on a mildly boosted car, the return line shoudlnt have too much being forced in it does it if i use a quality part like Aeromotive FPR?

just curious how i would be chasing a rich condition?

HRHohio

I'm running the Aeromotive 340 fuel pump and 60lb injectors, and Racetronix Hot Wire Kit.

Next question... still keep the in-tank fuel pressure regulator setup, or remove if adding Boost Referenced Fuel Regulator and a return?

JoshuaGrooms83

iTrader: (2)

from what i keep readind about it, you just take it out and thats it once you go BR-FPR. need someone whos done this to verify this but im pretty sure thats whats been said.

Nasty N8

iTrader: (33)

We do our dual pump setups on the stock lines Safely to 700whp. As long as you have enough pump the lines should be fine. After that plan new lines with a true return setup.

JoshuaGrooms83

iTrader: (2)

thats what ive seen around the forum, thanks for the verification.

a4ls2goat

heres my stock rails with a aftermarket regulator and return

Old Geezer

iTrader: (3)

the fpr is not the determining factor. The size of the return line is. [Could be].
Restricted return flow will affect the tune. IE: could be rich, as the fuel return volume will be restricted.
If you can't adjust the reg +/- 5 psi over/under the desired pressure, you have an issue that needs to be corrected.

HRHohio

Hmmm.... Is that something that can be taken care of in a single tune?

JoshuaGrooms83

iTrader: (2)

ok, but isnt a 4an hose bigger then a stock factory fuel line? even a stock return line?
how much fuel is actually being returned when the vehicle is under load?

so as long as there isnt a restriction for going back ot the tank, this rich condtion shouldnt arise right?

id image that a rich condition is better then a lean condition when you are pushing your engine with a turbo though. a good tune should fix this.

with a modest 600hp, stock sized return line should be ok from what alot of people that have ran the evap as a return line.

BuffJoeyD

iTrader: (2)

If you are gonna run the return you should be running the FRP @/ close to the rail: Gotta ditch the in tank FPR.

You sure you don't wanna put that $100 toward a real fuel rail. You know you are gonna want double pump setup N e way.

JoshuaGrooms83

iTrader: (2)

$100?! where the hell did you get an aftermarket fuel rail setup for under $100? are you talking just the 2 rails and thats it? cause even the cheapy ebay rails are over $150 incomplete and $200 for ebay kits complete. fast and other name brands start at $200 for just rails and a couple fittings but no lines or FPR. you had to have had a really good deal on them cause new they arnt cheap.

now the double pump, maybe later. for now im sticking with the single racetronics to get my build up and running. for ease of tuning and possible future power goals, im getting a BR-FPR. seems really easy actually. and since im already messing with the fuel pump, i might as well do this too.

Somebody09

Nope. Feed is 3/8" (equivalent to 6an)... don't know about the V8 return line size near the back... V6 return line size is 5/16 (equivalent to 5an)... of course you already know 4an is 1/4". I'm pretty sure it was OnFire who used to have the TT Incon kit and was using the 4an test port as a return, and put down about 700 rwhp. If he could do it then you probably can too. Maybe it was 750. Doesn't the ZR1 have 3/8" feed and 5/16" return lines??