Ive got a 600cfm edelbrock on sbc. Its gravity feeding with original fuel pump. Should i runan electric fuel pump ? Looking for model A ford truck bed or at least bedsides
The only time I ever ran an electric fuel pump on a carbureted engine was due to frame interference like a SBC in a 35 up Ford frame. I have cut a clearance box in the Ford frame to eliminate the need for an electric pump. I've had good luck with mechanical pumps and I can see no other reason to run an electrical pump. No need for a pressure regulator either. I'm not anti electric pumps but I prefer mechanical pumps if possible.
It depends on what kind of power you're running. But with a 600 Eddy carb I'll assume it's not all that much therefore you'll be fine with what you have.
If the mechanical fuel pump is working properly you shouldn't need an electric one. Those Eddy's only require 5 lbs of pressure.
Edelbrocks don't like pressures over 6.5 lbs so if you put an electric pump you should also put a regulator in.
If the car is not used every day, a small electric pump near the rear on a switch works good to prime the system for fast starts.
And don't even think for one minute that a "stock" or mechanical pump does not produce over 5 psi readings as high as 8 psi are not uncommon,if you run an Edelbrock or Carter AFB,run a pressure regulator and do not use the dial type they are junk.
Pressure regulators don't work well with a mechanical pump because of the surging with each pump stroke. Bolt a Carter Muscle Car mechanical pump on it and forget it. Here's a couple of SBC pumps.... http://www.summitracing.com/parts/CRT-M4685/ http://www.summitracing.com/parts/CRT-M6626/ Here's a SBF pump.... http://www.summitracing.com/parts/CRT-M6588/ Here's a small block Chrysler pump.... http://www.summitracing.com/parts/CRT-M6866/ Here's a BBC pump.... http://www.summitracing.com/parts/CRT-M4530/ Here's a 351C/400 Ford pump.... http://www.summitracing.com/parts/CRT-M6882/ Here's a Y-Block/FE Ford pump.... http://www.summitracing.com/parts/CRT-M4008/ Here's a B/RB Chrysler pump.... http://www.summitracing.com/parts/CRT-M3672/ And so on and so on...... I normally recommend teeing off at the carb inlet and running a small copper line back to the firewall, up past the hood lip and to the cowl of the car. On the cowl, temporarily mount a mechanical, liquid-filled 0-15 psi fuel pressure gauge so that you can read it through the windshield as you drive. You can mount it temporarily with duct tape and tie wraps. This is the only bulletproof way I know of to get your fuel pressure under control and be absolutely certain about it. Personally, I think it's a good idea to mount the gauge permanently, with an internal light and some sort of rain protection for it. I can visualize a plastic bowl from the kitchen, cut in such a way as to make a hood for it. For those of you who have been brought up on EFI, where more pressure can make more horsepower, it doesn't work that way with carburetors. Too much fuel pressure will unload the needle and seat in the bowl and blow raw fuel into the intake manifold. This will result in tuning nightmares that you may never find unless you know this info about carburetors.
Exactly. Cut out anything that's in the way of making something work right. Same deal on a good set of equal-length, tuned headers, cut out whatever is in the way of making them fit and build it back later. With a MIG, 4" hand grinder, Sawzall and a cutting torch, I can make anything fit anything.
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