Fuel pump recommendation

[Steve Shauger]

I installed the rebuilt original engine in my Z28. Immediately the fuel pump had fuel pouring out of the vent hole. I installed a brand new from Napa and had flooding issues. Installed a fuel pressure gauge and 12.5psi.

I am looking for a replacement now and any recommendations would be appreciated.

Anyone have experience using a Carter M4685

Anyone have a Delco replacement

Anyone have an original 40669 rebuildable core.

Thanks in advance!

[cheveslakr]

Just bought this one for my 327, haven't checked the fuel pressure so can't verify that. It seemed to solve the issue of hot starts due to overpowering the needle/seat though. It's the cheapest usable pump out there I think, but I did have to reclock it, and tap the holes, since every other hole has threads. I believe it was an 8mm/24 tap???

[Danzo]

Bringing this back to life. I have the same ?'s as Steve did. Anyone have any new light to share?
Ty. Doc

[Lynn]

I posted on a thread a few years ago about this issue. All of the modern fuel pumps have way too much pressure. I don't know if they all use the same spring from the same manufacturer or what. I went through several trying to find one for the El Camino back in 2017. All were between 10 and 12.5 psi. Ended up getting a low pressure electric.

The only sure fire fix is to use one of the older rebuildable type pumps and purchase a rebuild kit.

[enio45]

Who is recommended for rebuilding/restoring original pumps?