Currently running a single Walbro 450 on the FPCM with pwm control (returnless) and am out of pump on E85. The pump also does not seem to like running at lower duty cycle, so I plan on going full return using dual 450’s, with the 2nd pump on its own circuit and switched via boost.
I want to keep the fuel pressure sensor for logging, and the sensor circuit goes to the FPCM. The pump wiring through the FPCM is 3mm, which is approx 9 gauge. Does anyone see an issue with programming the FSCM to go full duty cycle, all the time on the primary pump, with the secondary pump on its own separate circuit? Using the FPCM would also provide a pump prime feature on initial key-on, shutting off after x seconds. This means lower battery draw with key on engine off, not that I would ever reflash without pulling fuses each time, lol. I already have the FSCM licensed. I am just not sure that the FSCM tables can be written to keep the primary pump at 100% all the time without some unforeseen quirks.