Technical How to index a SBC fuel pump

I have a Carter M-2468 fuel pump going on the SBC that I’m putting in my 40.
It supposedly is indexable to change the positions of the inlet and outlet.


Anybody done this?

Looks simple enough, but I want to eliminate any possibility of having to buy another one after I screw it up.

Looks like you simply remove the screws, clock the base to the desired position and put the screws back in.

Anybody have an exploded diagram of the internal pieces, just in case?

Thanks!

 

I believe you will find the other hole aren't tapped, I take em apart and run a 10 32? tap in the other holes a bolt em back together.

 

That's how I did it on my '41.

 

Yep. I’ve done it before. Very simple and no problems. There is nothing to fall apart.

 

Thanks!
@lumpy 63 Every other hole is tapped on this one.
Tapping the holes would make it more accurate to what is needed.

 

It may be a Carter??? but that laser etching on the pump is of concern. Every pump I tried that is identical to that one (55 thru 57) replacement from 4 differant manufacture names all failed.

 

@Johnny Gee
Thanks for the tip. I hadn’t noticed that until you mentioned it.
It is a Pioneer brand cross over, and in a Pioneer box from my local parts store.

Think I should return it and get a gennie CARTER?
Is this some re-box of a CARTER part with that number or a counterfeit?

 

I ended up installing a Carter M6900 and no longer have had fuel delivery issue’s or flat out failure either of which was stopped working, pivot pin came out or just let loose and blew out fuel from lower cover.

 

I tried three carters like yours. Clocked as we have always done. None of the worked after clocking.
I bought the cheap Carter replumbed
the pump

 

Thanks, but I need to use that specific pump to clear the front crossmember and save the surgery on it.

 

You could gut it then send fuel thru it via and electric fuel pump.

 

One thing you must do before tightening the screws is to push the arm in, this pulls the diaphragm up an stops it from tearing and failing. JW

 

Ingenious today the least!

 

I did the same thing on a customer's cadillac. The thing sits on top of the engine and it is in plain view. That way, it still looks stock with the electric pump.

 

This is what helps prevent premature failure.
Usually clocking is only needed to be able to line up with pre formed steel lines or to clear an
obstruction.