so i've got my LO3 to MAP TPI swap all done and now i have to look at fuel delivery. in the tech articles it says that a MPFI V6 fuel pump will work with a tpi setup, is this true?? i was wondering if it will pump out enough pph. any input greatly appreciated.
KrisW
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Jul 17, 2025
The V6 pump is okay for TBI; I wouldn't use it for TPI...
When you go to the parts store, look up the pump for the 89 turbo trans am. It is the same pump that the first vortec trucks used and is just awesome for the TPI setup. It is designed for a 60 psi vortec system pressure and with your stock regulator you will get your minimum 41 psi for sure. There are no downsides to running this pump.
It only costs about 5 bucks more than any other 3rd gen...
When you go to the parts store, look up the pump for the 89 turbo trans am. It is the same pump that the first vortec trucks used and is just awesome for the TPI setup. It is designed for a 60 psi vortec system pressure and with your stock regulator you will get your minimum 41 psi for sure. There are no downsides to running this pump.
It only costs about 5 bucks more than any other 3rd gen...
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Oct 26, 2020
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You will need a high pressure pump for Tpi. Tbi is around 15psi while tpi operates at 45 or so, but mpfi i think has the high press the tpi needs. Just order a 255 lph pump from holley are some one i think the holley is like $120 or so from jegs and you'll have a good fule system
http://store.summitracing.com/egnsea...=KeywordSearch
http://store.summitracing.com/egnsea...=KeywordSearch
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I installed the TTA pump this past weekend and it's much better that the stock one. Holds 50 PSI WOT through 6K. (the stock pump would drop to about 42 PSI at full throttle/4500+) I also suggest adding a relay to get full voltage to the pump if doing a lot of performance upgrades. Made a noticable differance in fuel pressure when I did in car tests. 2-5 PSI!Originally Posted by KrisW
When you go to the parts store, look up the pump for the 89 turbo trans am. It is the same pump that the first vortec trucks used and is just awesome for the TPI setup. It is designed for a 60 psi vortec system pressure and with your stock regulator you will get your minimum 41 psi for sure. what is the part number for the TTA pump???? i went to lordco and they just looked at me all dumb founded
i put in the v6 pump today just to get it running. i think the v6 pump will pump out enough psi and gph, since its the exact same pump as the tpi cars (same P/N.) id much rather have the TTA pump though.
i put in the v6 pump today just to get it running. i think the v6 pump will pump out enough psi and gph, since its the exact same pump as the tpi cars (same P/N.) id much rather have the TTA pump though. KrisW
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Jul 17, 2025
You can also look up a fuel pump for a 97 GMC Suburban 1500 with a 350 Vortec engine.
Part numbers are:
E3270 Master
P74074 Carter
Good luck!
Both are around 75-85 bucks.
Part numbers are:
E3270 Master
P74074 Carter
Good luck!
Both are around 75-85 bucks.
will this pump work with my sending unit? 91 LO3. or does it mount differently in the tank? thanks!
julian
julian
KrisW
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Jul 17, 2025
It's an exact replacement. No mods necessary.