340 Head/Cam upgrade before vs after with results
New build: Same bottom end , un-opened except for cam change, oil pan did not come off, Comp solid 294S 248/248 @ .050" .525" 110, Properly worked heads ('576 or something) 2.05/1.6 11/32" valves -flow 248-251cfm @ .500" , 273 rockers, Comp pushrods, Holley 650 HP dbl, same LD4B cleaned up.
Assembled and put back on dyno. 410 hp @ 6500 388.9 tq @ 4900 rpm. Love solid flat tappets, and tests like these. J.Rob
New build: Same bottom end , un-opened except for cam change, oil pan did not come off, Comp solid 294S 248/248 @ .050" .525" 110, Properly worked heads ('576 or something) 2.05/1.6 11/32" valves -flow 248-251cfm @ .500" , 273 rockers, Comp pushrods, Holley 650 HP dbl, same LD4B cleaned up.
Assembled and put back on dyno. 410 hp @ 6500 388.9 tq @ 4900 rpm. Love solid flat tappets, and tests like these. J.Rob
