Originally Posted by Nyteryder
SARD 550cc side feeds. according to the power FC i maxed them well before 25psi was reached so i'm just happy i didn't pop the motor. the powerFC may be reading funny though, because marshall's car made 396whp on 50lb topfeeds (~550cc) and never seemed to max them out. i'm not sure what base pressure he was running though with the JWT ecu that was in the car.
yeah i thought they are reaching the end of there road at around 350ish whp
if I recall correctly enjuku was one of the first to reach the 400whp mark on 550/50lb injectors with the red hatch s13. As Erin stated I had a JWT ECU and also had a MAFS controller. This allowed us to adjust the voltage to the MAFS giving a finer tuning line for the a/f curve. I still have the graphs- although I think the 396 is on a floppy still- but some show the a/f curve and it was dead on the money. I think we could have hit 425rwhp with those injectors but would have been maxed out at that point. I used a stock 300ZTT fuel pump, 300ZTT fuel filter, JWT fuel reg, and stock fuel lines with a JWT fuel rail.
06 Mazda 3
If I were to take a wild guess as it was years ago, but I think my base fuel pressure was @42 with no vac.
wild guess but sounds about right.....
06 Mazda 3
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