What fuel pressure w/ 42lb injectors??

Verlin

Founding Member
Nov 8, 2002
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0
Big Spring, Tx.
Ok, I finally got my distributor back in and the timing set to 14*(after 3hrs!) After the TF intake, 42lb injectors, 65mm throttle body, and a 85mm mass air install, what should my fuel pressure be at? I just need to be safe driving it until I get the NOVI 1000, and 255 fuel pump on. I had the fuel pressure at 40 but it wouldnt even run. Now it is at 31. The car seem pretty sluggish right now too?? Is this about right or which way do I need to adjust the FP? Im going to try the NOVI install next weekend!! Just need drivability. Thanks!!
 
Your car should run fine with the 42's as long as everything else is running ok. Is your mass air calibrated for 42's (supercharged)?. I wouldn't run anything under 35 psi or your fuel will not spray right.
 
Yeah, I was thinking the same thing. It should still run well with stock fuel pressure until you can get it dyno tuned. Anywhere from 38-40lbs should be right. Turning it too low will cause the fuel to "squirt" in rather than spray in an make it run like crap.
 
My car acts like it wants to die when i start turning the fuel pressure up. At 40 the smell of gas was extremely strong? Should be ok though? Ill raise the fuel pressure and se how that goes? And yes the mass air is calibrated to the 42s. Dont know if it is for a supercharger though?