Slant 6 power?

Bill Dedman said

The 302 cubic inch 1968 Chevy Z-28 has virtually the same per-cylinder displacement as a 225 /6. (225/6 = 37.5; 302/8 = 37.75.)

Chevrolet saw fit to put 1.6" exhaust valves in those motors, and we all know how those engines run.... Bigger valves USUALLY make more power.

Click to expand...

agreed but on you have to think of how much bigger of a port they were dealing with (and a 2.02 intake??)... also there is no reason to have that big because of compression, more in, less out...

stage V found by reducing the exhaust valve by i think .004" on there hemi heads they picked up like 5-7cfm through out the mid range and lost nothing on the top end...

so what i am getting at is yes bigger valves make more power but as a "rule" the exhasut should be 80% of the intake size... so 1.80/1.44 would be perfect... in theory...

and thanks bill! fun to go back and forth like this! learn this in the process!