Sorry, Guys, was driving home from an all day session with Fezzler...
I use a local guy, Andy Vaughan of Thermal Tech Coatings, in Hopewell, VA. He charges $15/piston/coat.
What you see is:
- a Thermal Reflective coat on the domes (helps reflect the combustion heat back up towards the head and away from the underside of the piston. Some arguments too about it helping with a more complete burn of the fuel and reduction of carbon build-up.
- skirts are treated with Dry Film Lubricant for dry starts, reduced friction (less heat) and prolongs the life of the slug
- underside of piston is treated with Oil Shed coating. This I had applied to help prevent crankcase oil from clinging to the piston and absorbing heat from combustion, thereby in theory keeping oil temp lower. How much? No clue. worth it? $60 against the price of a build and cooler oil on an air-cooled motor; I think so.
If you would like some assistance on logistics, you are welcome to send them to me, and I will ferry them back and forth to Andy. But Brian, that motor deserves these coatings. And Matt, at least the upper 2 for yours since you're running an oil cooler on your track bike.