Taijutsu

Forum: Looks like my SB fuel pump has died. It is very old.
Is there something better than stock I can use?
Possibly something aftermarket is possible?
Not ready for an elect just yet.

TIA

R

71VetteLover

They may be available from Chevrolet Performance Parts but all of the Corvette-only vendors should stock them.

HeadsU.P.

For one thing, a new pump has to be a three port. Not the easiest to find, but do-able.
Hard to beat a good ol' GM though.

ignatz

I wasn't aware there was a three port pump? Doesn't the 432 fuel filter (if I remember the part # correctly) simplify the OP's search by providing a return path with a conventional pump.

Taijutsu

Mine has 2 ports. A rubber line coming in and a short hard line to the carb.

HeadsU.P.

I believe its:
Inlet
Outlet
By-Pass or return

If you only have two, then you can use about any aftermarket unit.

Taijutsu

There is a third port that is blocked at the factory.

ignatz

got one of these? The only need, so far as I know is to mitigate vapor lock

Taijutsu

Mine is straight up/down w/ports on the bottom facing front and I think side?

Big2Bird

My 81 has one. I don't recall what year that started. Maybe 78?

Big2Bird

Rock Auto stocks Delco.

ignatz

OP has a 74

Taijutsu

Now I have to find a way to take out the third bolt up higher on the FP!

HeadsU.P.

You mean on the mounting plate? F.P. only has two bolts, plate has four. There is no need to remove the plate unless its leaking oil.
I have a one foot long - 3/8" drive extension that makes quick work of reaching the F.P. bolts. Some people take off the right front tire to access. Don't forget the pushrod bolt to help you on the front of the block.

Brcmpbl

Easy job, just a little messy.

No reason to use anything other than a stock replacement pump.

Taijutsu

I was taking off the plate. Eek
The two bolts holding it on are too close to body to get a wrench or socket on it properly.
Not to mention the bolts seem stuck.

I'm taking a break, I will try again later.

Thanks

Taijutsu

In shopping and comparing mech FP. The cheap ones are rated at 5-6 gph and the good pumps are rated higher.
Looks like you get what you pay for.

HeadsU.P.

Go slow. You Do Not Want To Break a Bolt Down There! PB Blaster would normally work but that is a blind hole. Can't use heat next to a fuel line.

Taijutsu

If I can't get the bolt to move. I'm tempted to try and break the FP into pieces? lol

R

TimAT

If you install a pump that has MORE than 5-6 psi, you'll more than likely get a host of other problems- like the float, needle and seat won't be able to control the fuel coming in and flooding the engine.

There are 2 bolts, 9/16 head that hold the pump to the block, and 2 7/16 head bolts that hold the plate to the block. With a/c, about the only way in there is thru the wheel/inner fender or from under the car.

FWIW: that little factory fuel pump supported the 3x2 carbs on the 427/435hp, and the L-88's as delivered from the factory.