Dishing the 2229 Piston - Questions ?

[maxparrish]

Maybe someone can help me. I've seen recommendations for increasing the 2229 piston dish volume to obtain the reduce the desired compression ratio. However does this not mean the calculated quench height wrong on our calculator? (Original comment) - I finally found an answer, you measure quench from the flat part of the piston head (on a D head).

But I notice that Leigh Machining cuts grooves in the piston head. Does this irregular surface cause problems with gas dispersion? Seems like a series of ridges is not a good thing...

[oletshot]

I looked at Leigh's web site and didn't notice the ridges your talking about. Unless you mean the machine marks in the dished area, which isn't where the quench area is.

On a side note, I liked how he tries to make hand machining sound better and more customizable (not sure that's a word) than CNC machining. BULL!!! CNC can adjust tool heights by .0001", let's see a knee mill do that.