adjustable ?

[Joe K]

Originally Posted by Bruce of MN

I don't know what functions the KRW tooling does, but regular valve grinding machines can be set at 90 deg to shorten the stem.

The tooling is unique in that you assemble the "jig" (which measures from the valve seat DOWN to the tappet - and then use that in a special grinder which allows you to grind ONLY THAT MUCH - and to include the 14 thou (or whatever is built into the system) "clearance." There is no measuring (or even adjusting for that matter) the clearance of the valve train.

You set it - and do it. That's it.

You have, of course ONE SHOT to grind it correctly. If not right you get another valve and start again (or hope that the one you ground short can be used in the other seven valve stations.)

It's a system which is designed around the stock Model A engine sans inserts, valve swap-outs, or any other modern variants which have sprung up since the age of KRW. If anything is changed, possibly even decking (I'll have to think about that) then you can't do KRW.

Joe K


Edit: Think. Decking or grinding/replacing valve seats has to be done BEFORE grinding/adjusting the valves in the KRW system.