AFR Blue Hornet Mopar cylinder head, Charles Servedio

I very much agree with this. I would really like to dyno test the same head ported 2 different ways. One would be focusing on mid lift flow with a moderate crash or stall at 0.600 lift. Next would be the same port with the short turn worked a little more to eliminate the crash or stall. Port 2 would have the prettier curve and a higher peak. Port 1 would have more 0.350-0.550 lift. My money would be on port 1 for the very reason you suggested. If we do a good job getting air in early the depression is not 28 inches at max lift. So in the running engine does the flow really crash?

I know you like the 50 degree seats and I’m not arguing that. I’d like to test that as well. On the flow bench the 45 degree seats naturally create a good port number 1. 50 degree seats naturally make a port number 2. The mix and match game would be fun.


The biggest thing I’ve seen on steeper than 45 degree seats is the candles and the widths of them.

I’m picking up my heads on Monday and I’ll double check the cutter numbers so I know for sure what I was using.

I know it’s difficult to get the angles and the widths right with stones. And I had three sets of cutters (six if you count the 55’s) for inline wedge, canted valve wedge and hemi dong beater stuff.

They all take different valve jobs.

If you were closer I’d say do the heads up and we could test them on my pump and see what happens.