I am installing my 9lb intercooled procharger on my 93 cobra and want to add 42lb injectors but not sure what size MAF to use, I was thinking at least an 85mm. What do you think would be the best setup??? And do you think a boost a pump is needed or worth the $$$$???

 

I'm no expert but I think an 85mm MAF should work fine. The blow-through designs are better for forced induction cars because the the signal doesn't get messed up by changes in airflow and turbulence from elbows and stuff. What fuel pump are you running? You most likely will need a 255lph hi-pressure pump especially with 42s. With that pump, I don't think you'll need the boost-a-pump, not for 9lbs of boost anyway.

 

Its the one that comes with the Procharger kit I got which is rated for 240LPH at 42 psi. This pump is used in conjuction with the stock in tank fuel pump. So I guess I would have well over 255lph. Don't know what a stock 93 cobra fuel pump is rated at though, do you?

 

I believe what came with your blower kit is not a fuel pump but an FMU (Fuel Management Unit), its mounted in the engine bay on the strut tower right? The FMU increases fuel pressure and is made so you CAN run a stock fuel system with the blower but its really only a "band-aid" type thing in my opinion. I think a stock 93 cobra pump is an 88lph just like a stock 5.0 GT.

Here is a very recent thread with good information that pertains to your situation: http://forums.bradbarnett.net/showthread.php?t=472970