camshaftxe

Will a stock intank tbi pump put up enough pressure for a carb or must I use an aftermarket one?

Apeiron

The stock in-tank pump will put out far too much pressure for a carb.

F-Body Demon

You can use the stock TBI fuel pump but you need to run a regulator to bring the pressure down. I think TBI is like 15 psi (I think im probably wrong but close) and you need to bring it down to 7 psi or whatever your carb is setup to run. If it were me I would set it up to run a fuel pump for the application and not mess with the setup. After replacing a EFI in tank fuel pump trust me, you dont want that mess. You can get a Carb pickup out of a junk yard and then get an new pump. You'll be in it for shy of $200 bucks if your patient and do it right. Not to mention it will be done right which in my experience ALWAYS pays off in the long run.

five7kid

It could be argued that the "fuel pump for the application" is an in-tank electric. Vapor lock is a real problem with our cars, and a return-style regulated in-tank electric pump system is very good for eliminating that problem.

An aftermarket high-performance in-tank electric would be a better choice than a factory EFI replacement, as it will supply the fuel volume needed (which is the real issue with the TBI pump, not pressure), and would last longer.

camshaftxe

Recomendations? Walbro 255?

five7kid

Very popular. Haven't used one myself, so can't say from personal experience.