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Thread: fuel pump upgrade

  1. #1
    Lifetime Member ZL1Killa's Avatar
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    May 2005
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    Default fuel pump upgrade

    I'm going to be doing the STS kit and running motron 60# injectors ....my stock pump drops about ~2-3psi at WOT. would upgrading the fuel pump keep that steady instead of varying?...stock pump is seeing 58psi peak

    should I run the stock fuel pump and the 60#ers or upgrade the pump also?
    01 T/A WS6 #4984 STOCK 342HP and 352TQ [/b]MODS:Too many to list, PM...funny rear mount.. father/son build.
    [Quote :ur car is sneezing!!!!]
    I KNOW KUNG FU.
    My STS build: http://www.ls1tech.com/forums/showthread.php?t=631954
    453HP 475TQ @6psi
    .....CAM'd, IC'd, and 7psi'd #'s coming.....

  2. #2
    New Member
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    May 2006
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    you have a couple of options for the fuel pump when you order your sts kit you can order with it a boost a pump which raises the voltage to the pump and forces it to pump more fuel when you are running in a boosted condition or you can get either the Walbro or Holly in tank replacement pump. the replacement pump should run you about $175 and the boost a pump will be about $100 more.

    hope this helps.

  3. #3
    Lifetime Member ZL1Killa's Avatar
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    so just buy the in tank pump and then i will be good to go?
    01 T/A WS6 #4984 STOCK 342HP and 352TQ [/b]MODS:Too many to list, PM...funny rear mount.. father/son build.
    [Quote :ur car is sneezing!!!!]
    I KNOW KUNG FU.
    My STS build: http://www.ls1tech.com/forums/showthread.php?t=631954
    453HP 475TQ @6psi
    .....CAM'd, IC'd, and 7psi'd #'s coming.....

  4. #4
    New Member
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    May 2006
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    2

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    yes just buy the pump it is more reliable and cheaper

  5. #5

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    I agree. We used the BAP as a last resort to just bump the fuel capacity up a notch more when the Walbro is reaching it's limit. The in tank pump will be a cleaner install.

    www.redline-motorsports.net

    1-954-703-5560

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  6. #6
    Senior Member VortechC5's Avatar
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    I run a Racetronics pump in my car. It works fine except that the fuel pressure drops after the car has run awhile. When cold I see about 63 psi and after an hour or so of driving the fuel pressure is down to 58 psi. It makes it difficult to know what psi to set the fuel injectors up for. Maybe this is a function of the lovely C5 returnless fuel system.
    02 C5 Coupe - LS7, TSP 265 LS7 heads, ARH, Z06 cat-back, HREs, 3.73 gears, Wilwood brakes, DeWitts radiator

    15 C7 Z5 1 Coupe - stock for now

    12 Avalanche - tune, Corsa Touring

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