Originally posted by strummin67:
How deep did you go with the groove?
Well it depends on what you have to work with. As with cylinder head porting; the first and most important thing to do is determine where the water jackets are. I like to groove aftermarket heads because the manufacturers add material to the deck, this allows grooving with out worry of weakening the head or hitting the water jacket.
If deck thickness allows I cut the initial groove 0.060” to 0.080” deep. When the deck is thin ( < 0.250”) I cut the initial groove to 0.040” deep. The bottom of the groove is then contoured into the combustion chamber cavity, getting deeper as it approaches the chamber.
This picture illustrates the depth at the cavity.
