knappbunch

I have 402 see sig! We have checked the 255 mph walbro. Pump and hoses are fine have 42# Bosch green tops and after about 5000 rpm the pressure at the rail drops from 58 down to about 30 and stays there it is not a gradual drop it falls right off! What could be some things we are not looking at?

Lonnies Performance

iTrader: (16)

With a 500+RWHP engine you are likely out of pump.

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