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SVO: Getting extra valve stem height out of a stock head
> Date: Tue, 16 Dec 1997 04:30:08 -0500 (EST)
> From: "Scott Shidel..." <email@example.com>
> Maybe the way he runs the cam on a stock head is by sinking the valves in
> the head a bit to get the extra clearance..How do you do that without
> removing the head you ask? Simple...
> Once the springs are removed, get some of your favorite lapping compound,
> and squirt it into the ports onto the backside of the valve..Jiggle the
> valve up and down a bit to get the lapping compound all over the face.
> Get your favorite high speed 1/4" drill, lock the chuck to the valve stem,
> and whirr away.
No no no....you have it all wrong again Scott ;) If you want to pound in
those valves real good for that extra .1 inch of valve stem height all you
need to do is fill the car up with good gas, back the base timing off to
ohhh 20 ATDC with SPOUT out, and run the car wide open at full boost for a
couple hours...that'll pound them in good (read: that's partly why my
Engle went flat incidentally...seats were pounded in and stem height was
too high) :)