Quote:



I did a couple engines with step head pistons , the first set of heads I machined the chambers by hand on a bridgeport , the second I used a bridgeport with a prototrak and wrote a program to do the half moon cutouts.



When machining the chamber with a CNC mill, what would be the preferred radius on the insert for the round part of the half moon?

1969 Super Bee Six Pack
1969 Charger R/T SE
1968 Crown Coupe