5,700 498.9 541 0.431 38.3 156 163 65.6 5.9 84
5,800 489.6 541 0.431 38.3 156 163 65.4 5.9 85
5,900 478.7 538 0.431 38.1 156 163 65.3 5.9 85
6,000 462.4 528 0.431 37.9 156 163 65.1 5.8 84
6,100 445.2 517 0.439 38 156 163 64.8 5.8 84
6,200 430.6 508 0.456 38.7 156 163 64.4 5.8 84
6,300 416.8 500 0.468 39 156 163 64.1 5.8 84
6,400 406 494.7 0.479 39.3 156 163 63.9 5.8 84
6,500 395.6 489.6 0.489 39.7 156 164 63.6 5.8 84
Average Data
5,250 510 503 0.408 33.66 154.7 162.7 64.7 5.87 84.1
Inertia Factor 1.32     Time 6.9 Secs

These are the results of our best pull with the ported 452 casting steel heads. Note that peak power came at a leisurely 5,600 rpm, then dropped off dramatically after 6,000 rpm. This combination should like a fairly low shift point, which will substantially increase the life of the engine.