Topic: Piston skirt coating

[maksuttt]

Tried to find a topic about skirt coating, but didn't get any special information.
Searched Goggle: found http://www.swaintech.com/ , http://www.pistoncoating.com/ , etc.
Nothing about materials (a secret, uh?), application by yourself, etc.

Is it possible to find those fancy materials (dry film lubricants) and make it in garage?

I used to use Russian stuff with disulfide molybdenum - worked extremely fine on small two-strokers.

I know, MRieck had experience with that (and promised to start topic ), maybe anybody else?

[bwaller]

I had a set done (skirt coating & thermal dome coating) done at Swaintech after discussing with MRieck.  I'm not interested in a do-it-yourself attempt so can't help with materials.

[MRieck]

I did promise to start a thread...damn memory loss. Anyway The Swain Tech PC-9 is great. I was looking at some Mazada racing pistons about a month ago that had the PC-9 coating applied to tighten up the skirt to wall clearance. This engine ran 5 or 6 12 hour endurance races and the skirts looked perfect...they maybe lost .0005. It was enough to convince me that it is a great product and different from other moly or teflon coatings. I had my piston skirts done to compensate for wear...it can be applied up to .004 thick which is great if you have rare pistons or pistons that are otherwise in good shape.

[Gabus]

Don't remember what brand, but it's commonly done on Honda VTEC car engines that are turboed. I've seen race engines (18-40 PSI) with many runs on them and the pistons still look almost new. There's a coating for the domes that reflects heat also.

[nickjtc]

These engines have the capability of being very 'long lived', so I wonder what kind of a difference coating the pistons would make to a non-stressed 'regular useage' engine?