Don Terrill’s Speed-Talk

The valve runs past the point where the top of the ring is at TDC.

Thank you for the suggestion though.

Thank you both, Very helpful.

Brian.

I have an issue with intake valves hitting the bore wall. I would like to make the last race meeting of the year (no time to do a new head). I was wondering whether I could turn down the valve diameter which would obviously narrow down the inlet seat. I figure that if I reduce the intake seat to .03...

My guess would be by changing lash.

Or improve the part that broke and repeat............

Great news - Well done Mike.