odysseyguy13

Hey everyone. I'm working on a project and am putting an '02 LS1 into a '56 Chevy. I was hookinhg up all the fuel lines and pump but couldn't find a fuel return line to the tank. Do these motors have return lines to pump the excess fuel back to the tank? If so where does it come out of? Also will I need to install an external pressure regulator? Thanks, Parker

bluecajun5.3

iTrader: (31)

02 ls1 style fuel rail is returnless.
to make it work, you'll need to find a 97/98 vette fuel rail or some of the aftermarket companies can help you out with a fuel rail.

LS1DER

iTrader: (6)

On my 98 ls1 the return line ties into the fuel feed line before the fuel filter at the back of the car. I'm at work now but can get you a picture of how it ties in later if you want.

odysseyguy13

LS1DER a picture would be great if you don't mind. bluecajun5.3, how does the '02 fuel rail work w/o a return line? does the stock pump turn on and off as fuel is needed or what? Thanks for the info.

STALL UP

iTrader: (2)

the stock return is built into the stock pump housing, just get some aftermarket fuel rails and run it from there.

bluecajun5.3

iTrader: (31)

i have no idea, lol...
i just know this info b/c i'm swapping an ls6 intake on my truck soon.

odysseyguy13

does anyone know a good place to buy aftermarket fuel rails if thats what I end up having to do?

odysseyguy13

i've been doing a little research and it seems like if I use the fuel rails from a '97-'98 Corvette it will have the pressure regulator and return line built into the rails. does that seem like it would work? sounds good, just wondering if anyone has ever done or seen that swap.

alky

The return on f-body is the y-block just after the filter. From what I found out. You can do this a few different ways.
I bought a set of billet fuel rails and made a complete return style system with a external pump and an Aeromotive regulator.
Or, you can do the 97-98 corvette stock fuel rails that has a return fitting on it.
Or, you can keep the factory rails and mount a return style fuel pressure regulator in line at the rear of the car. (near the tank) Setup is, fuel pump out to one side of reg and fuel to rails out the other side. Bottom return of reg back to tank. There is a long post on pro-touring.com in the fuel injection area just about this subject.

Hope this helps

odysseyguy13

thanks alky

MiaSSmaro98

iTrader: (9)

alky can u post a pic of adding a regulator to the stock return while keeping stock fbody rails

LS1DER

iTrader: (6)

Sorry I forgot to get it last night. In the first pic you can see the t block after the filter. The hard line coming off of the t block is the return line going back to the tank. The second picture is where the hard return line is coupled to the return hose which goes back to the pump unit in tank. The fuel pump runs continuously. The fuel pressure regulator supplies the correct amount of fuel to the fuel rails and the rest comes back through the return line. Somebody correct me if I'm wrong.

alky

Sorry, no pics now. The setup I'm describing is used in a lot of conversions. From the fuel pump out goto one side of adjusable fp reg like the aeromotive A1000. Next outlet of the other side of fp reg to fuel rails. (Stock or billet) Then the returnline comes of the bottom of the reg back to the tank.

odysseyguy13

I think I got it now, I have to order a regulator and try and hook it all up. What kind of connectors did you use to connect the hoses to the regulator?

alky

AN parts are best. (Earls, Russell, Aeroquip, ect.) If you're on a bugget ues push lock type hoses, good to 250lbs. Summit and Jegs are your friends
Use the Russell adapter fitting for the rail to 6-an. Part #rus-640850 in other thread.

V6 Bird

iTrader: (15)

I bought some Mustang fuel rails off a local Mustang dude. Used the SPeed inc blocks and welded them on with a tig and re-anodized them red when i was done. Looks trick and like htey are supposed to be there. BTW, 302 rails have the same injector spacing as LS1's

Nasty N8

iTrader: (33)

We have aftermarket fuel rails if needed or you can also use the Corvette fuel filter it has the regulator built in and you return the fuel back from there. Just used one on an RX7 swap turned out great. I can help you setup your complete fuel system.

Nate

kp

iTrader: (34)

Cant get any less complicated then the 97-98 vette fuel rails and a couple russell quick disconnect to AN adapters and two lines. Plus you wont even need a fuel pressure gauge since the regulator is pre-set for stock LS1 pressure

FUroundeye

iTrader: (6)

The hard part is finding a 97/98 vette fuel rail that costs less than new aftermarket rails

kp

iTrader: (34)

Thats true, I have thrown a couple out though, never thought they would be good for engine swaps

Probably would br cheaper overall to do the regulator in the back and aftermarket rails, Nothing wrong with the regulator in the rear if its not a high HP car.