groberts101 wrote:twl wrote:We have used Swain Tech skirt coatings which do this. They may not be identical to the OP product, but do basically the same thing from another supplier. Been using it for several years.
We have found good results from this sort of coating in some of our applications.
yeah.. have seen them too, plus they're cheaper. I have to wonder what the composition of that coating is though? Plastic frits like line2line's or ceramic based? They did say their PT-9 or PC-9, not sure which, coatings are not meant to be built up as thick due to potential for coating failures when reaching excessive thicknesses. just under .001 was standard application and max around .002 was the next option up for a few bucks more.
Could you share any firsthand experiences with teardown/parts inspection? While I can imagine they get high spotted away just like any other skirt coating would.. any slight issues with coating delamination or the tiniest bit of oil system debri?
Have wondered for quite some time if these guys>> https://www.oerlikon.com/metco/en/produ ... sumebore/.. have a hand in the various coatings technology being formulated/applied these days. They have the material database to make nearly anything and work with major aeronautics, OEM's and race teams. Yamaha.. Rotax.. Borg Warner and probably many others.
forgot to add that they do that sumebore on loose liners too. Not stoked to ask about the pricing though. Looks like REALLY expensive equipment. lol
Worldwide based company.. might be able to help some of you guys over on the giant island too.
We have used it mostly on pistons that were a bit loose in the bore, to bring proper clearance. We have used up to .003" coating thickness on the skirt.
It doesn't last forever. In our aircooled motorcycle application with forged piston, it has needed reapplication after about 10k miles. However, ours is a fairly hard use application with very wide swings in thermal expansions of the parts in question, and in excess of what would be seen on water cooled auto engines.
I don't have pics, but it does solve some issues without causing new piston purchase, at least for a reasonable amount of mileage, and it is not very expensive.