3 angle valve job - blend in bottom cut?

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Old December 12th, 2022 | 03:40 PM
  #1  
RocketV8's Avatar
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From: Mora, Sweden
3 angle valve job - blend in bottom cut?

I just got my #2 heads back from the cylinder head shop. The valves are 2.07/1.71 with a valve/throat ratio of 88.5%. This made the bottom 60 degree cut wide with a sharp edge at the short turn.
Should I blend the bottom cut into the throat? Or just break the edge?
Should I do it all the way around or just the part marked in yellow?
Or just leave it?


Old December 12th, 2022 | 04:00 PM
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Break the edge at least. These are going on a 330?
Old December 13th, 2022 | 02:19 AM
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Originally Posted by cutlassefi
Break the edge at least. These are going on a 330?
Yes, but 340 cid (4" bore). It will have your cam in it.

/ Karl-Anders
Mora, Sweden
Old December 13th, 2022 | 05:05 AM
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Originally Posted by RocketV8
Yes, but 340 cid (4" bore). It will have your cam in it.

/ Karl-Anders
Mora, Sweden
Gotcha. Not sure I would’ve put such a large exhaust valve in it though.
Best of luck in your project moving forward.
Old December 13th, 2022 | 06:30 AM
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Originally Posted by cutlassefi
Gotcha. Not sure I would’ve put such a large exhaust valve in it though.
Best of luck in your project moving forward.
Yeah, I know it is an unnecessarily big exhaust valve. I bought them as a package deal years ago, so it is what it is...
Thanks!
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