Starting to Learn on 95 G30 5.7 for Towing

[Fast355]

I am also only comparing to your comparitive numbers in your table form.

The TBI head and cam engine with rockers and headers made over 200 rwhp from 3,600-4,600 rpm. Kitch also saw very similar results. You both have standard 12cc dished pistons, mine were the 18cc dished but full disclosure here I had a 454 throttle body and 1" open center spacer under it with an edelbrock 3704 intake manifold that had been bored to 2".

The Express van hit 200 rwhp at 3,450 rpm and even with failing valve springs did not drop below 200 rwhp until over 5,200 rpm and even then it only did that because of horrendous valve float. I had never seen an engine fall off that badly before I experienced that. I have never seen such a mild cammed engine gain torque at peak, have the peak torque rpm drop 200 rpm and gain 27 hp with a 500 rpm higher peak from changing valve springs either.