Quote:
Originally Posted by zipphreak
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The stock HPFP on the F-series N55 is undersized, to the point of running out of volume with FBO on 100oct, map7. I can even exceed the HPFP's capacity with a few consecutive long pulls on 91oct and map2.
When HPFP capacity is exceeded, the result is stumbles and misfires at high RPM.
Until I can figure out a better solution, I'm running an upgraded LPFP and a low-volume TBI setup from Fuel-It, with integrated control from a custom firmware JB4 and FSB (fail-safe box). My next step up will likely be JB4 integrated PI, but I'm also trying to find out if the S55 HPFP setup (dual pumps) can be retrofitted to the N55.
You can find more details on my setup in the forum dedicated to the JB4, in the N55 section.