Hello everyone , looking for advice. I have a 1992 5.0 gt. I had a comp cam with .512 lift put in,flo-tek aluminum head 180cc/58cc and a gt-40 intake. My question is, what size throttlebody, MAF,and injectors should I use? Thanks.
I'm not sure what size the TB opening is on the GT40 intake but I would say for an n/a street car.
70MM Maf
65MM TB
24lb. injectors
Obviously if your planning on boosting it injectors etc. would change.
Also upgrade fuel pump if you haven't already.
GT40 "series" of intakes have 69mm-70mm TB throat.
So, TB 65mm or 70mm , MAM 70mm to 76mm... I doubt larger would hurt but the 70/76 will fit the stock air box.
I agree with 65 MM throttle body, 24 lb injectors, and I recommend a 75mm Pro M MAF. A 70 MM TB would work, but the bigger you go the more your throttle responds tends to suffer slightly.
if it were my car I'd find a 70MM MAF from a 94-95 GT and a 65MM TB from an Explorer and call it a day. You will need to do a little fab work to get them to work on the fox body but for under $100 you are set, I would leave the 19# injectos as you are not setting the world on fire with that combo