There ya go, there ya go! Look at the big increase in flows at the lower lifts. Even if 15% of the bigger valve sees a subtle increase in shrouding, it won't lessen the total flow in that area compared to the smaller valve, and if it did, other 85% of the larger valve more than makes up for it. And lets not hear that bologna about big valves lowering the port velocity and torque. The velocity will be controlled, in the greater part, by cubic inches and rpm vs the smallest sectional area of the port, not the valve size. You will see greater average torque with the bigger valve. Everytime we put in bigger valves we see power increases in 318's to 500's.
