Help with custom pistons for a different stroker

[inline6]

I'm filling out the custom piston form for CP/Carrillo pistons and I'm not sure what info they are looking for in a couple of the boxes on the form. I'd like to complete the form and get it to them for rough estimate on pricing - I will have my machinist/engine builder look through all the info to confirm everything is correct before they start machining... But, I'd like to know what these are now:

 

"Flat/Angle Mill How Much?"

 

These will be flat top pistons with valve reliefs. I am guessing that "Flat" is what I put here. However, they will not be flat with the deck surface. With a 1mm thick head gasket, I want the pistons to be .015" above the deck... this gives .024" piston to head clearance, which from reading the forums here is pretty much the minimum that will work. By the way, I don't see where to put info regarding location of the valve reliefs nor depth of them...

 

"Deck Clear"

 

Elsewhere on the form, they ask for "Comp Dist" which I believe is compression height. Could "Deck Clear" be the amount the piston goes above deck (the .015" mentioned above)?

 

 

"Lift/Lift at Overlap" followed by "Int" and "Exh" in close proximity on the form. I have various cam specs that came printed out on a sheet of paper with the cam I bought, but no "cam card"...

 

Next is "Lobe Separation" which is 104º from the info I have on the cam. And next to that field is "Installed @". What is that?

 

Then comes "Free Drop"... again followed in close proximity with "Int" and "Exh" I have no idea what that is.

 

The rest I think I have figured out.

Edited December 27, 2010 by inline6

[mario_82_ZXT]

My friend just ordered from Ross for custom pistons.

 

One of the guys there has a 3.2l stroker so they (seem) to know their stuff. They walked my friend through it all and actually faxed US the order form filled out.