Fuel pump -- mechanical or electric?

hotrod_06010 · Jan 9, 2004

Don't know if this is the right forum, but here we go. Buddy is having a 454 built. Bored .60 over 282 cam 2inch tube headers air gap maifold and holly 750. I think we should go with a electric pump but he was told that a mechanical racing pump would be better. Was just wondering what everyone else was running and what you guys think.

Thanks for any info,
Dan

Scott_68_SS · Jan 9, 2004

There are pros and cons to each.
A mechanical pump is easier to install. And cheaper. So that's probably why you see a lot of them. If the car has a 5/16 fuel line. A mechanical probably won't keep up. It didn't on my 408 with a slightly bigger cam. A 3/8 line should with that cam. If it is 5/16, an electric will solve the problem. If desired, you can buy a shut off switch like the EFI cars use to turn the pump off in an accident. Painless Wiring makes it I think. A oil pressure switch in the power circuit is cheaper, but not as safe in an accident.

I've always ran electric on my hot rods. I really enjoy the stories guys have on these boards on how to fill the float bowls up for cam breakin. I just get in, turn the key, wait 5 secs and start it up.

Also, you might want to try 1 7/8 headers for that cam IMOP. 2" is a little big for a 282.

hotrod_06010 · Jan 9, 2004

thanks Scott

mc71454 · Jan 10, 2004

Dan....

You Must Read This....

http://www.chevelles.com/cgi-bin/forum/ultimatebb.cgi?ubb=get_topic;f=4;t=018248

hotrod_06010 · Jan 10, 2004

Ok, Call me thick headed. What is the deal with the mechanical? Are they more reliable then the electric? I was thinking electric, that way I can run the fuel line out of the way.

Thanks again,
Dan

mc71454 · Jan 10, 2004

Originally posted by hotrod_06010:
Ok, Call me thick headed. What is the deal with the mechanical? Are they more reliable then the electric?

Yes, they are by a long shot...

Bob West · Jan 10, 2004

OR.....you could use both

I have a Carter mechanical and a Mallory Comp140

hotrod_06010 · Jan 10, 2004

thanks everyone. Still confused but more informed

mc71454 · Jan 10, 2004

Dan,

I am not sure what you are confused about, let's try and solve this

hotrod_06010 · Jan 11, 2004

ok Tom I'll try.

I always thought electric pumps were better because they keep the fuel pressure constant no matter what the rpm. Also they stop the fuel as soon as the key is off. I also think it is much easier to run the fuel line as opposed to where the stock line is run.

Ok bottom line is what is the differances between the two. I just want to make sure that when we get the motor together that we have a dependable gas delivery system. I really don't care wich is better just want to make sure I have the best.

Thanks all.

TwoLaneBlackTop · Jan 11, 2004

RapidRobert, are you running Nitrous? If not I dont understand why you would run two?

Fuel pump -- mechanical or electric?

hotrod_06010

Scott_68_SS

hotrod_06010

mc71454

hotrod_06010

mc71454

Bob West

hotrod_06010

mc71454

hotrod_06010

TwoLaneBlackTop

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