This is an interesting topic I found over on Honda-tech and figured it something we can all discuss and learn from....
How does skirt coating affect piston to wall clearance?
"CP calls for .0035" clearance. Right now my pistons are 3.3060" with my Swaintech PC-9 coating and my bores are 3.3085" leaving me with only .0025" piston to wall clearance instead of the recommended .0035".
Will .0025" be enough to run on a high boost car? If not, I can open up the bores another thousandths but then what happends if/when the skirt coating wears off? Then my clearance will be too much. The coating is approx .001" thick on each side.
Someone also suggested with the gold coat thermal coating my pistons tops recieved, they may not heat up and expand as much. Meaning they will not need as much piston to wall clearance."
Please discuss.....
How does skirt coating affect piston to wall clearance?
"CP calls for .0035" clearance. Right now my pistons are 3.3060" with my Swaintech PC-9 coating and my bores are 3.3085" leaving me with only .0025" piston to wall clearance instead of the recommended .0035".
Will .0025" be enough to run on a high boost car? If not, I can open up the bores another thousandths but then what happends if/when the skirt coating wears off? Then my clearance will be too much. The coating is approx .001" thick on each side.
Someone also suggested with the gold coat thermal coating my pistons tops recieved, they may not heat up and expand as much. Meaning they will not need as much piston to wall clearance."
Please discuss.....