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the_engineers
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PostPosted: Thu Nov 22, 2012 2:22 pm 
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Most machine shops will do just the bottom cut of the valve job if you ask. That way you can port with less money (and risk of nicking a fresh seat) involved...

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robertob
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PostPosted: Thu Nov 22, 2012 4:51 pm 
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That's more or less what they did - just the 70 degree cut and a clean up with the 45 degree. I was going to bring it back after for the final 45 cut and a bit of 30 degree.
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PiD v4.0
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PostPosted: Sat Nov 24, 2012 4:17 am 
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Anybody tried "Extrude Honing" instead of grinding?

I'm thinking of seeing how well it goes to match the ports to a Clifford HyperPak manifold, plus fitting hardened seats and bigger valves of course.


PiD v4.0

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robertob
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PostPosted: Sat Nov 24, 2012 8:05 am 
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Anybody tried "Extrude Honing" instead of grinding?

I'm thinking of seeing how well it goes to match the ports to a Clifford HyperPak manifold, plus fitting hardened seats and bigger valves of course.


PiD v4.0
You need someone to have the proper tooling, I didn't think anyone still did. CNC porting has taken over most of the common applications.
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Dart270
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PostPosted: Sun Nov 25, 2012 3:32 am 
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Proper tooling is not engine specific for extrude honing. Greg Ondayko on this site had his HP intake extrude honed so you might talk to him.

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