[Ol' Ron]

I've run some flow test on cumbustion chamber design, and as airflow speeds increas so does the turbulence caused by chamber irregularities. overt 4500 RPN The turblance increase dreamily and the valve bowl is the worst. One reason the torque drops after 4500 rpm. John and I talked about it when he as buildinng his Bvill engine and he came uo with the new guides which helped this area. Photos in his book. I'll post some computer flow graphs, but can't be sure of their accuracy
Gramps