SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: bkplesh on July 07, 2007, 02:20:49 PM

Title: fuel pressure for daul carbs
Post by: bkplesh on July 07, 2007, 02:20:49 PM

what should the fuel pressure be for daul carbs? A starting point. it a 454 with two 850's i think

Title: Re: fuel pressure for daul carbs
Post by: crewchief22 on July 07, 2007, 02:32:42 PM

Holley carburetors run good with between 5-7psi pressure.  Over 8psi can push fuel past the needle and seat.  A lot of pumps (mechanical or electric) will run a little high on pressure requiring a pressure regulator.

Title: Re: fuel pressure for daul carbs
Post by: bkplesh on July 07, 2007, 02:55:38 PM

thanx, that's what what i thought. just want to be right

Title: Re: fuel pressure for daul carbs
Post by: beerjet on July 07, 2007, 06:12:10 PM

Mines at 7psi .

-beerjet-

Title: Re: fuel pressure for daul carbs
Post by: bkplesh on July 07, 2007, 07:31:19 PM

i set it for 6

Title: Re: fuel pressure for daul carbs
Post by: Marcsrollin on July 09, 2007, 11:34:26 AM

I am runnin dual 750's and mine is set at 7 psi.

Title: Re: fuel pressure for daul carbs
Post by: hotrod56cars on July 09, 2007, 11:41:25 AM

I'm running a single Holley DP 650 fed by a $39.95 Kragen electric fuel pump with an operating pressure of 4 - 7 psi, no fuel pressure gauge.

I just changed my avitar and felt like I needed to jack a thread.

Thanks.

Title: Re: fuel pressure for daul carbs
Post by: FORKEDUP on July 09, 2007, 01:15:30 PM

running 7-8psi on mine, dual holleys