bobthegeezer

i am building a lq4 based engine for my 95 gmc 1/2 ton.i intend to run it carbeurated so do i need upgraded fuel system as i would to use fuel injection?

G Atsma

If anything you will have to put a pressure regulator in to reduce pressure for the carburetor, as I know the truck came fuel-injscted

Che70velle

iTrader: (6)

The 95’ trucks came with tbi injection, which operate at 12-15 lbs of fuel pressure, iirc. I’ve seen guys put carbs on those engines without changing anything, and not overpressure the carb. On the other hand, most carbs want 8lbs of pressure, so you make the call. I’ve seen it done, but personally I’d regulate it down. I have an scsb 88’ with a carb, but I completely re-did the entire fuel system, with a fuel cell, external pump, filter, and regulator.

pdxmotorhead

I wouldn't run a carb without a regulator any more,, Needle and seat sets just don't hold up like the old ones did.. On a higher HP carb motor its volume not pressure...

I run a regulator, and I use the Chysler Jeep fuel filter, they are cheap and flow a lot..
I own a jeep wrangler and grabbed one one time for a quickie repair, they are big enough to flow well and small enough to hide fairly well.. If I recall its a 3/8 line.. If that helps..

Doug G

Q-jet/Edelbrock carbs....5-6psi

Holley/Demon.....7psi