i just dropped a 98 LS1 motor into my 77 K20 p/u and need to feed it now.

to tell you the truth i dove into the deep end of the pool and need to learn how to swim.

i know that that motor runs at 58 psi and that it controls the pressure via the fuel pump.
ive never pulled out a camaro fuel pump out of the tank but is the pickup tube adjustible?
if not would an aftermarket camaro fuel pump be adjastible? (just thought of this will check but if you know... but i still would like to know how the whole thing works)
i don't want to run external one (one more thing to damage in the mud pits).
if i was to get an aftermarket fuel pump that puts out over 58 psi im guessing i would have to get a regulator for the set up. where would be the wise spot for it, im guessing the closer to the motor the better.
how does the return line work? as in delivered fuel that doesnt get sprayed into the pistons returns down this line but is it going through and orphice? or is it free flowing back? does the return line have to be smaller?
are 3/8" i.d. fuel lines planty for a stock ls1?

and any other parts (except fuel filter) that i have ommited, or suggestions on how to put it together or help would be greately appreciated.

before LS1 gods (not you, the ponies)

thanks

lukeys bro

 

There are two different ways to control pressure. The method used in the LT1 was to run all the fuel from the fuel pump to the passenger side fuel rail, and put the pressure regulator on the return line from the drivers side rail. In effect, all the fuel goes through the rails, and the part you don't need is returned to the tank on pressure control.

The second way is what was used on the LS1's... the pump flows to a pressure regulator which is near the fuel filter (I think), and it only sends the required fuel to the rails, and bypasses internal to the pressure regulator to a line back to the tank. In effect, only the fuel the engine requires goes to the rails, and is dead-ended there.

In niether case is the fuel pump adjustable... an external fuel pressure regulator is required. It can be adjustable if you want. The factory regulators are not.

If you want in intank pump, there are numerous aftermarket pumps available... the Walbro pumps seem to be popular. I would then run -AN braided lines for the fuel connections, although that will require an adapter or some welding at the rail end of the line. A -6AN will supply all the fuel you will need, up to 1,000HP, assuming your pump is healthy. -6AN should be used for the return line as well.

My preference is to keep the fuel pressure regulator as close to the rails as possible, to keep the pressure as stable as possible. So, since the LS1 rails are dead-ended, you would have to use a "bypass" type regulator up under the hood.

 

thank you much, this makes it much easyer, (first time i heard of the fuel pump being adjusted by a puter but possible i guess (i was told that))
in this case i got to get the reg and fuel filter off that camaro too and just use whatever pump works (assuming it pumps enough)

thank you much my man (<--assumnig), you made me a happy man .

lukeys bro