While Indy does not reference it I know some guys have done it....how much have you rolled your Indys....wondering if any one has gone .250"....looking for as much compression as I can get and am using a reverse dome piston....it's a 468 so the inches help but want to be above 13:1

I angle mill them 1/2 a degree then correct intake face...spot facing head bolt holes is simple...here's the thing...I don't use Indy's cnc program for the chamber or ex. port.

I hand port them only. So my chambers end up around 48cc.
Brian

So that's about .060"

I had mine 245 cnc'd about 2 years ago... They are the new style castings with the INDY logo under the spark plugs recessed in not raised. Wishing I would not have had the exhaust ports done and hoping they don't turn into sprinklers. I asked if the leaks were still a problem and was told try were not.....I guess we will see...going to be doing some hand work on the intakes today...

My 360-1's were angle milled .100" and if I remember they came in at 53 cc chambers getting ready to dissemble the engine after 12 years I'll check them again

Thanks