As said before primary and secondary valve opening/durations mean NOTHING. They are there for emissions only and a possible 100 rpm longer power band in either direction. Seat duration doesnt mean ANYTHING in the production of power either. Its the amount of meat under the seat that counts. A better number would be the 0.050 durations.

Last edited by Travis; 04/19/04 03:44 PM.

Ex-cat cams dealer. Today we do motor mounts.. Tommorow. Intake manifolds