I think the fuel pumps aren't getting enough power cause the pressure is dropping off at the end with 20psi. I have a bosch supra pump with a Vortec T-Rex inline. This should be good for 600hp but I'm only getting 425 until it starts to drop. I was wondering how much life it would take off the pumps running a relay strait from battery to pump

 

What's your fuel pressure at the end of the run? that's what matters....

running 14 volts under low load will not offer any help to your car at higher rpms.

Brian

 

I know it won't help if I'm actually getting 14v at high load but I don't think I am. Basically what I want to do is bypass the resistors and run strait 14v all the time

Fuel pressures are dropping right at 6500rpms running 20psi. So it'll stay at 60psi but then start to drop up at redline and make the car lean out. It only drops 4-5psi but it's enough to make you want to get off throttle so it doesn't drop further. 4-5psi drop can mean a blown motor, especially with a rotary