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Electric fuel pump options for carbed stock 350?

y5mgisi

y5mgisi

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If a person wanted to swap to a 87+ 350 block to get the one piece rear main and easy roller cam, that would mean they cant run a mechanical fuel pump. What pumps would be good choices for someone like myself who will have a mostly stock (350hp max) 350, want a quiet pump, cheap, and reliable.
 
Some roller cam blocks had one peice rear main, with the fuel pump pushrod drilled.

My 89 K2500 LD had one.
 
Ive heard of that. There just seems to be no rhyme or reason to what blocks are and arent drilled.
 
What I've been planning if I cant get my TBI running right is I'll go back to carb (I want more power than TBI will get me for a reasonable amount of cash)

I figure I'll run the TBI pump and fuel lines into a bypass regulator, mounted on the firewall, then into the carb. If the TBI pump doesnt flow enough, I'll step up to a better TPI pump.

I think the in tank setup would be best, and still fairly easy to pull off, but IIRC the holley pumps are pretty popular.
 
THats actually a pretty good idea. I could just use a external tbi style pump and do like you said. Its funny, cause i have done this before. Came up with this idea, then priced everything out, and found that for nearly the same money i could do a 5.3/6.0 swap...
 
The TBI pump is internal. I would be sticking with that style.

The Holley blue or red pumps which I cannot remember the difference now, are external. IMO with how available and cheap these parts are, theres no reason not to have the pump in the tank in these trucks.
 
1986 truck blocks are factory carb/mechanical fuel pump and one piece rear main. You would have to use a pre 87 retro roller cam though.
 
Get your 1pcs RMS block machined for a mechanical fuel pump or put an in tank setup in. External fuel pumps are stupid loud and Id put money that no matter how " Ahhh Im not bothered by the noise" you are you'll eventually get frustrated with it.
 
I've run a Holley blue pump on my old K10 (mouned on the frame under the bed) and that b!tch was LOUD. I have no idea of sound level but I believe a Walbro E2000 is a popular external pump.
 
My cousin has a 638 block that came roller and one piece, no problem with mech pumps. Says you shouldn't have a problem with that 87 either, unless it's some bastard block or something.

I would double/triple check the ability to use a mechanical pump, far more reliable and similar than an electric.
 
Also, most people would want a "return" style regulator, not a "bypass" style. The return type goes before the carb with a port to send overflow back to the tank. A bypass type also sends overflow to the tank but it goes after the carb and manages pressure via back pressure.

I don't mean to spit hairs, I just don't want anyone to buy the wrong regulator.
 
nvrenuf said:
Also, most people would want a "return" style regulator, not a "bypass" style. The return type goes before the carb with a port to send overflow back to the tank. A bypass type also sends overflow to the tank but it goes after the carb and manages pressure via back pressure.

I don't mean to spit hairs, I just don't want anyone to buy the wrong regulator.
Click to expand...

Thanks for clearing that up.
 
Fwiw, I run a Barry Grant bypass style on my truck and I'm very happy with it.

DSC00082_zpsd531f6c4.jpg
 
External electric pumps just straight up suck. Loud and unreliable.

For a stock engine, get a factory in tank pump and tank. You need to have that baffling in the tank. The regulator has to be a bypass or return, doesn't matter which though as long as it has proper pressure at the carb and relieves excess back to the tank.
 
Doesnt 454 pumps, and I think LT1 or TPI pumps pump more volume. Any aftermarket or stock electric pump will provide pressure no problem. A carb, especially on a motor like that, only needs 6psi or so. Its the volume you need to consider. I would bet a stock 454 TBI pump in a factory TBI tank will be adequate, and easy to do, and use commonly available parts.
 
For a stock engine or close to stock I think a TBI pump will be plenty.
 
Got a Holley HP125 internally regulated on my Beaumont(383sbc). Might be a bit overkill for a stock motor though. Im also running a deadheaded fuel system as well.

But I had universal Bosch inline pump that was also internally regulated on the car before the holley, Id bet it would do the job just fine.

Id shoot for a early tbi block drilled already, way less hassle IMO.
 
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