David Vizard, Uncle Tony's garage, Unity motorsport. Mission impossible Dodge 302 Head porting

92b said

You don't know any stock class racers who port crappy iron heads because rules dictate that is the head they must use? I did it for years racing in a class that required stock cast iron heads that could be and were ported. Are they ( myself included) in their right mind? Probably not.

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So you made me think a bit more about this. I’m watching (again) Servedio’s videos. In this particular one he is worried about his mid lift numbers and swirl.

As I’m looking at the video I’m thinking “screw the flow bench numbers and slide a 50 degree valve job on that beeotch”.

Servedio doesn’t have a seat and guide machine so he does his valve jobs with a stone and it’s a real biiiitch to do a 50 with stones and get all the other cuts correct and a 52 would be even harder. A 55 is near impossible and a 60 would be out of the question with a stone.

But that’s what I’d do. I‘d use a 50 degree seat, make the bowls 90-90.5% on the intake and 91% on the exhaust and then blend it all out and send it.