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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

walbro 255 pump

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Old 05-14-2010, 10:22 AM
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Default walbro 255 pump
i have a walbro 255 already i checked my fuel pressure with stock pump the car running and its at 40 psi should i change the pump before i get a dyno tune or leave it alone?
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Old 05-14-2010, 05:55 PM
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If it were me, I would. If for no other reason than the fact that you have it. 40 psi at idle isn't bad.
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Old 05-15-2010, 01:08 PM
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What are your mods? Do you need the increased volume? Your current pressure is within design parameters, given that you do not apparently have an adjustable FPR.
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