Thread: Fuel...

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Hi my name is Dennis Im new here. I dont own any hot rods but hot boat...
I have 555ci Chevy built by Dave Ebbert in Costa Mesa CA. 802hp about 40hrs on it.

I have two 750 Holleys on it. Optimal fuel pressure is @ 7psi. It gets flooded really easy at start up. Usaully will get up to 8 or 9psi while cranking it when flooded, but goes down a few seconds after idle. Im looking at from the mechanical gauge.

So usually I will let it sit till I see the gauge drop down to 2 or 3 psi then crank it. Im new to big engines.. my question is.. Is is bad to fire up the motor with the fuel pressure higher than normal. Should i let the pressure go down or just fire it up?? Will this cause it to backfire?

Engine specs..
- 555 cubic inch, naturally aspirated
- Runs on 91 octane pump gas
- 802hp @ 6500rpms
- 648ft/lbs of torque @ 6500rpms
- Edelbrock tunnel ram
- Twin Holley 750cfm double-pumpers
- Brodix aluminum heads - over $1000 in porting
- Brodix stud girdle
- CP forged pistons
- Fuller solid roller system (lifters and rockers)
- DNE propietary Cam spec and build
- Eagle 4340 crank
- Eagle 4340 connecting rods
- Dart Big M block
- System 1 remote oil filter
- Injegtor butterfly scoop
- Barry Grant fuel pressure regulator
- Edelbrock mechanical fuel pump
- MSD 7AL Ignition
- MSD crank trigger
- MSD distributor
- oil cooler
- Miloden 10qt racing oil pan with windage tray