Things that come to mind are what rocker ratio, the lash amount and intensity of rhe cam, thickness of the rings, and the effect of the intake/adapter combo, and how much room for improvement there might be in those areas?
My first 440-1 build after porting the heads made over 840 hp with a similar cam but injected methanol. So i bet the things i mentioned may be holding it back from 850 hp.

Last edited by gregsdart; 04/06/24 09:47 AM.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky