Anyone use Nippon FRM pistons?
02-13-2019, 07:19 AM
#71
Based on the technical papers available, the coating is actually quite lasting; in others words, it is a permanent solution and not a sacrificial coating. There are too many unanswered questions and that's why I wanna try to document as much as I can from practical experience. The engine is going in this Saturday, so I will have an update then.
02-13-2019, 03:23 PM
#73
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You misunderstood my words. I do know what happens when ring ends meet each other but filing rings is a common task and has been done successfully for years. I am a bit skeptical about coatings though and their durability for street engines although I would love to try them
02-14-2019, 07:10 AM
#74
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You misunderstood my words. I do know what happens when ring ends meet each other but filing rings is a common task and has been done successfully for years. I am a bit skeptical about coatings though and their durability for street engines although I would love to try them
02-14-2019, 02:32 PM
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ah, I agree. I put swaintech coatings on the skirts of my CP pistons, supposedly they are .0015" thick... my PTW is set at .0035. If those coatings wear off ill surely know it with a .005" ptw, it would slap like hell. Motor doesnt even have 1k miles on it yet though. Time will tell
02-14-2019, 09:24 PM
#76
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So you opted for 0.0035" clearance also measuring coating thickness? I am not into coatings a lot but I thought that coatings actually work the other way around: i.e take a CP piston for example, set clearance at 0.0035" and then coat the piston, subtracting the 0.0015" coating thickness. So finally, you have a 0.0020" piston-2-wall or more precisely coating-to-wall clearance.
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