fuel pumps
08-01-2008, 07:43 PM
#1
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Car: 91 rs
Engine: tbi 350
Transmission: 700r/manual
Axle/Gears: 3.23
fuel pumps
Will a stock intank tbi pump put up enough pressure for a carb or must I use an aftermarket one?
08-01-2008, 07:49 PM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: fuel pumps
The stock in-tank pump will put out far too much pressure for a carb.
08-01-2008, 07:57 PM
#3
Re: fuel pumps
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.
08-04-2008, 02:29 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
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.
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.
08-05-2008, 01:29 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Very popular. Haven't used one myself, so can't say from personal experience.
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