Trans_AM_88

1: can i just slap a mechanical fuel pump on an L98? someone told me that the hole for it is blocked off.

2: whats mechanical fuel pump should i get? does a napa one suffice of should i get a holley or edelbrock?

3: do i need to get the pushrod also? or does the fuel pump come with one? cuz the L98 doesn't have one right?


thanks

ShiftyCapone

iTrader: (7)

A mechanical pump will never supply the PSI you need for your L98. However, unless you go carb.

Trans_AM_88

sorry forgot to mention it's carbed already

Damon

What you need:

1. Fuel Pump. I like the Carter 6 PSI street pump @ 110 GPH, but there are many good aftermarket ones to choose from.

2. Fuel Pump Pushrod. Not supplied with the pump.

3. Fuel pump plate from a carbureted engine. Your stock one is a solid plate with no place for the pump lever arm to stick through inside the engine to contact the pushrod. A carbureted engine plate has an oval-shaped hole in it for the lever arm to stick through but is otherwise identical.

4. two gaskets- one that seals the plate to the block and the other that seals the pump to the plate. The pump-to-plate gasket is typically supplied with the pump. The plate-to-block gasket you can buy separately or just use a thin smear of RTV to seal it up.

Yes, your L-98 roller cam has a fuel pump eccentric to drive the pump and yes, the fuel pump pushrod hole is present in the block. It's basically a bolt-on.

ljnowell

Go buy a stock replacement fuel pump. It will supply more than enough fuel for your engine up to 400hp.

8Mike9

I can do a quick look on my block, but I don't think the L98 has the hole casted in it to add a mech fuel pump.

Trans_AM_88

yeah let me know

Stekman

What does the car run on now? Or doesn't it run yet?

ljnowell

Man, I would think that it would. My brother had a '96 350 block, and it still had the mechanical pump hole there, just blocked off.

8Mike9

Well, color me wrong, there is a blockoff plate down there.

Trans_AM_88

so that means no mechanical fuel pump right? damn. i have a blue holley electric pump but the damn thing is so loud i can hear it running inside the car

8Mike9

This means you can install a mechanical pump...do as Damon posted above.

Is the only reason you want to switch is because of the noise?

Trans_AM_88

yeah pretty much. i think it's because there is no return line. a AFPR with return line is like $100