Edward01

I'm considering a TPI to carb swap and am wondering if the stock roller cam has a cam lobe to operate a mechanical fuel pump?

Thanks,

Ed

89RsPower!

why not just get a 3 port return style regulator and save yourself the headache of pulling the pump out of the tank?

Pat Hall

iTrader: (31)

I'm not 100% certain, but probably 99% sure it does have the fuel pump lobe. I don't think they did away with the mech. pump lobe until the LT1 motors.

Edward01

89RsPower! & Pat Hall,

Thanks for the response. 89jRsPower!, I pulled this motor out of my '91 Z28 to make room for something else. The Z's motor is going into my '55 Chevy and I didn't want to have to buy a fuel injection tank and pump. I may have to rethink this escapade.

Thanks,

Ed

five7kid

iTrader: (14)

I know the '87 TPI cam I had did have the pump lobe.

When the engine's out, pull the pump cover and stick a pump rod up there, turn the engine over a couple of revolutions. If the rod stays in the same place, you don't have a lobe and you're putting an electric pump in your '55 anyway.

89RsPower!

the solutions pretty simple really, do what 57 described above, it'll cost you all of 5 minutes.. most likely it does have a pump lobe, if not you could always run an inline electric pump.

Dokken10

iTrader: (18)

I sold a 91 Z28 350 TPI longblock to a guy who installed it a mid-70s El Camino, he called later and asked me the same question. He called later and said it did not have the lobe and had to run a electric fuel pump. Thats what he said anyways.

Damon

My 92 RS motor (305 TBI) definitely did NOT have a pump eccentric lobe. Every 87 motor I've taken apart (TPI or TBI) DID have one, however.

I think sometime around 1990 GM started removing the pump eccentric lobe from production line passenger car cams. No prooof, but that seems to be about where things start to get a little funky.