Dickie-311

iTrader: (1)

I recently bought a LS6 INTAKE with rails and injectors but it didn't come with the regulator on it, guy took it off and used it ...can I swap the one off my LS1 fuel rail and use that ?

Dickie-311

iTrader: (1)

nobody knows ????

jrpimp00

iTrader: (17)

There is no regulator on the ls1 rail, its a damper.

HCI2000SS

iTrader: (2)

Exactly right! OP it's in the fuel tank along with the bucket and all that

Dickie-311

iTrader: (1)

oh ok..didn't know that .. then can I transfer the ls1 fuel rails to the ls6 intake ?

chasgiv3

iTrader: (1)

When I swapped over to my LS6 intake I re-used my old fuel rails and injectors without any issues.

Once I went Turbo I bought aftermarket fuel rails eliminated the in tank fuel pressure regulator and installed an external fuel pressure regulator that's boost referenced.

You'll have no issue re-using the parts. Hell I still have that old intake and fuel rail in my parts bin in the attic of my garage....LOL...

mbobek88

Hey. Sorry for jumping on but have similar question. I also thought the LS-1 rail contained a regulator. I see references to the LS-1 regulator "on the rail" on occassion. I'm installing an aftermarket tank into 64 Malibu. Can i assume the new tank/pump has a regulator (as you said) or is that only for a stock tank. Also, the pump has a return nozzle. The LS-1 rail does not have a fuel return. Can i simply plug the return nozzle at the tank? Thanks a lot.

chasgiv3

iTrader: (1)

What I think is causing the confusion is the round cylinder that is attached to the crossover tube. This is called the accumulator. What I believe it does is to dampen the backwash of the injectors opening and closing between the left and right bank of the fuel rail. When an injector is quickly opened and then closed you can get an internal wave of pressure to feedback to another injector which can potentially cause a pressure spike. At least that's the theory. My guess is that it helps with passing emissions since if you spike a little more pressure to an opening injector you'll add a slight bit of more fuel and therefore run a tiny bit rich. Probably only really helps during cruising at a constant speed. Here's a picture:

chasgiv3

iTrader: (1)

Most aftermarket tanks make use of a supply and a separate return. You need to make sure you're using a tank and pump that is intended to be used for a late model GM returnless fuel system. Or you can do what all us racers do and simply go old school and add an external regulator and set it to 58PSI. If you're going to use the stock fuel rail you'll need place the regulator before the fuel rail and plumb a return line.

I hope this makes sense.
Here's a link that might help you to understand what you need to do:
http://vetteworksonline.net/ls1_conversion_fuel.htm