Valve differences

[blown49]

Originally Posted by Ol' Ron

Thanks, I printed this info for future use. FYI the amt of material removed fron seat grinding will have little or know affect on spring pressure. Stainsles steal valves are bad for cast guides unless chrome plated. Most aftermarket guides are too oose for the valve. Knurling and fitting the valves to .0005-.001" stem clearance prevents oil contamination of the combustion chamber.
A thin coating of RTV on the guide is all that's necessary cor intake guide seal. Harden seats on the intake valves is un-necessary.
This is most of the valve info I have.

Ron, I probably didn't explain things very well, so I'll try again.

If I grind the seat 0.020" (verticaly) then the valve sits lower in the block. Since the horseshoe clip rests against the bottom of the deck guide bore, the guide is in the same position as it was before the seat was ground. As the valve sits lower by 0.020" the spring is lengthed by 0.020" also and thereby lowers valve seat pressure requiring shims.

Jim