valve stem height - need some help
If one were to have the valve seats in these heads cut on a guide and seat machine in a manor that helped with the flow....... the intake seats would end up being sunk a bit.
Then, if you’re paying attention to tip heights as part of the process, you could get the ex tips pretty close to the intake tips when you cut the exhaust seats....... since you’ll likely end up sinking those some as well.
It “could” be done with stones........ but that would a be a pretty looooong process.
Before I do a valve job here on
new heads......
Measure the valve seat face to tip lengths
Make sure seats are concentric
Measure tip lengths
Measure margins
Measure valve stem diameters
Make valve corrections as needed
Hone guides to proper clearance
Set cylinder head square in vertical mill
Measure valve spring seat depths
Measure valve depths
Make vertical mill corrections as needed
Using one each intake and exhaust valve, one retainer, one set of locks, measure existing installed heights.
Rough in all appropriate int or exh seat angles and depths the same, but still a few thousands proud
Make port and combustion chamber corrections
Finish seats
It gets all your installed heights and tip heights pretty close. During assembly there is still some spring, valve, shim, retainer and lock shuffling to even up the spring pressures.
The procedure varies some from the new to used cylinder heads.
