What is the proper valve seat width in big flat cylinders?
I have read all my books and also done some search here...
And all I found was confligting information.
original width information found was 0.15625" 45deg angle(pretty wide)
and Palmer book tells to narrow to 0.0625" (suprisingly narrow)
basic aircooled OHV engine seats are around 0.09"..but this is flathead.
Any opinions why this much difference in information? Or is this only
result of 60 year development and people still can't agree?
My old seats seems to be on narrow side,,but needs resurfasing.