Originally Posted by AndyF
Run a data log when you take it to the track and see what your duty cycle is. As long as you are in the 80% range you'll be fine. If the injector duty cycle gets up over 90% then you'll know it is time to upgrade to the XFlow.


On my Holley Hp Hilborn mine was at 94% , 48lb injectors, I raised my fuel pressure from 43 to 55 psi

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5