Head flow and power differences question / discussion

We've made just under 580HP with them, using a hyd. roller cam! But they need work, they were not ootb heads at all. Compression was 10.7:1.


But it’s not work the average guy can do. From what I’m seeing their cnc program or setup needs tweeked. That one port was so bad I couldn’t even use it to flow test a customer’s intake manifold on it. And the second port affected the outcome of the second flow test. If I remember it took about 8-10 minutes to fix that port to get it where it SHOULD be. But you would almost have to test every port to find the issue. Or you could turn your back and ship it as is like they did.