Mechanical vs electric fuel pump

[car00]

I'm curious to know what is better the stock mechanical pump on the car or to get a low psi inline fuel pump? The car is a 86 Chrysler fifth Avenue with the stock 318.

[Deleted]

Usually just matters on clearance with the frame..not very familiar with mopar,but GM caddies with small block swap sit the fuel pump real close to the frame,and with and bendage,the pump will break off...so electric is good on those.just all in what works for u,and how u set it up

[Deleted]

Just don’t get yourself burnt up out there trying to figure out if there’s enough clearance between the 2

[DerbyKing88s]

We always run electric but that’s just us, if you do run an electric i’d get one with a metal body, we don’t like to worry about the mechanical hitting frame and our protectors I don’t think have enough clearance for one.

[n8]

I prefer mechanical. I have had trouble in the past with electrical pumps causing carb problems or regulators taking a crap.

[rhull1977]

I've posted it before about 70s Ford's with a sbc I cut a piece out of the crossmember and flip it weld it back in. I run mechanical pumps. I also run methanol. I have never broke a pump off but I have had regulators screw up.

[moshier44]

Mechanical, I've had 2 crap out on me this year alone. If possible that's the way to go. Stupid way to go out is a failing electric pump.

[STROMI 121]

Was your electric pump mounted solid to the car?

[smashford]

Dual electric, buy good ones automotive or holley. I busted a mechanical off this year other wise I would have been 2nd place instead of no pay at all

[dean88]

I prefer mechanical if clearance isnt an issue. If clearance is an issue (SBC in a Caddy), then I run an electric ($40 Edelbrock), but I run 2 of them in parallel with a shutoff valve going to and leaving the pump with it's own switch. If I think a pump failed I close the valves to it, open the then other valves and turn on its redundant switches.

[STROMI 121]

Mounting an electric pump solid to the car is the same exact effect as dropping it on the shop floor. The inertia forces are about the same. Think about that.

[noser23x]

Electric fuel pump needs to be mounted correctly to work properly. Needs to be below the mass of the fuel in the tank and as close to the tank as possible. I prefer a gravity fed tank so you dont have to pull fuel through the tank but thats my personal preference. Electric pumps dont like to pull fuel they like to push fuel. I see so many a year mounted to a dash bar up high and then they scratch there head when they burn up. The last pump I mounted was probably 6" from outlet on tank. You can kind of see it in this picture. Note the pink pool noodles because the hardware store is closed and its the only thing in your garage to cover up metal corners.



And STROMI 121 I have been welding a thin gauge plate to back bar and leaving enough room to flex in the plate, and then running a rubber piece between pump and plate. Seems to work out well.

And in terms of pumps, I had a few issues with the clickity clack Mr Gasket pumps. Ran a few Holleys (red and blue with a regulator) with zero issues and have recently ran the little edelbrock pumps that are at most part stores and havent had an issue with those either.

[boom61]

I know I'm off topic but that pic just reminded me of something I've been pondering for awhile. ...I see a lot of guys run trans lines all sorts of ways going up and down, loopedy loops some old school coolers were just coils of tubing. Does that create pressure issues??

[noser23x]

Oct 11, 2018 23:39:46 GMT -5 boom61 said:

I know I'm off topic but that pic just reminded me of something I've been pondering for awhile. ...I see a lot of guys run trans lines all sorts of ways going up and down, loopedy loops some old school coolers were just coils of tubing. Does that create pressure issues??

I havent really found any although I prefer to run them horizontal if just takes up more room.