Need Help People!

[Pugman1212]

I have a 86 mustang gt very modified. Engine has rebuilt bottom end, Canfield aluminum heads,custome grind blower cam, 1.70 howards roller rockers, 30lb injectors, 255lph fuel pump, edelbrock performer intake 70 mm throttle body, 75mm pro-m mass air calib. For 30's vortech -v1 supercharger with smallest pulley about 12lbs of boost crx racing intercooler w/3" piping. Ok the car ran awesome with stock blower pulley making about 5-6lbs no cooler, but I can't leave well enough alone. Went to 12lb pulley and intercooler. Bumped fuel pressure up to about 55 lbs to give a better shot of fuel. Car pulls hard till 5000 rpm then sputters and coughs immediately I let off don't want to hurt her. Any ideas it may need bigger injector but what size? Mind you this is a street car never sees track time. I don't want it undriveable. Idle fluctuates too didn't do this before. Please advise.... Thanks

 

[jAEded]

Get bigger fuel injectors and get your car dyno tuned. Also, the Performer intake dumps all power at 5500 RPM. With a centrifugal s/c you might want to go to the higher rpm band intake.

I would go with at least 60#s. Too big won't hurt you with a good tune, too small will.

 

[jAEded]

I had a V3 trim in a 2003 3.8 V6 vert and I needed 56# injectors with a dyno tune for it to run right. I think it was making 8 psi at redline.