0949er

Anybody know the voltage range of the stock fuel pump?

WhiteFoxGT

Well the pump is a variable voltage design... so the FPDM gets B+ and sends voltage to the pump as necessary. What exactly are you trying to figure out?

0949er

well, does that mean its running at 10 V at idle and 12 V at full throttle? (just guessing numbers, but is that what you are saying?) and if so, what is the actual range between idle and full throttle in volts?

I am trying to figure out if this company fudged its LPH #'s on its flow chart (by over-increasing the test voltage that a stock GT will not run)

WhiteFoxGT

I dont have the exact voltage numbers handy, but it wont run more voltage then the car is putting out... so its safe to say that the pump doesnt see higher than battery voltage while running, so its going to be 13.5-14.5 volts

tbirdscwd

Like whitefox stated, the pump is controlled by the PCM via the FPDM. You won't ever get over the max voltage output from the alternator, but most likely will get less than that even at full throttle. The initial voltage when priming is up in the high 10 to mid 11 volt range. I would have to assume that max voltage would be somewhere in that neighborhood, but I can look it up in the morning for sure.

Hangwire

Kenne Bell BAPs can increase fuel pump voltage to 17+ volts under boost.