Originally Posted by ltd351
The shop I took my heads too just for a service were trying to tell me that a 3 angle valve job means 3 angles on the seats but only one angle on the valve, I was always under the impression that the valve would have 3 angles as well. Are they lazy or am I wrong?????
On a good note it seems the heads are very very nicely ported.
Howzit - I think your machine shop is correct.
A three angle valve job refers to cutting the valve seat & area either side of the seat face at different angles to reduce turbulence and smooth out the flow.
The valve touches the seat on one angled face only.
Sorry if the last part sounds like gobbledegook!