1Revvin7

rotary inspired,



The stuff I do for my own engines I don't show off...



Yes I sell the coatings to anyone, PM if you are interested in some parts.

rotaryinspired

Thank you,

it might be awhile, but yours looks nicer than the one I have used before from another company, not in the states. Plus your customer service cannot be as bad as theirs.

Brad

zoomazda

I don't think ceramics add up anything to the car's performance anyway... and they're pricey!



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kuhnke

i know when you put it on the rotors you keep the heat from transfering to the rotor, so you get more bang for your buck, and you can have themput the coating on extra thick on N/A motors to raise comprission ratio.

on the rx8 you pretty much have to put a thermal coating on the exhust if you want a performance motor, to keep from pre detonating.

and if you put oil retaning coating on bearings you will see longer bearing life, but be carful of this coating, we had some issuses with it from HPC, but since they switched owners the problem has not shown up again.

BDC

I'm referring to you, Elliot. I want some long-term numbers with lots of data before I ever get on that band-wagon. The only one time I've seen it done was on a customer's Semi-PP motor and needless to say the motor failed in very short order. Admittedly, that's the only time I've ever been personally involved with any internal ceramic coating.



The metallurgical relationship between the plating of the rotor housing and the makeup of the apex seal from what I've gathered is a decently sensitive one. While I'm certainly not of the ilk of proclaiming that something will flat-out not work w/o ever giving it a try, I am apprehensive about the internal use of something like this in the sense of it being sold en masse to people as a bonafiably good addition to the motor, be it for power, long-term reliability, or whatever, when the #1 thing that's the only thing that really matters is long-term quality control and testing. Without that, in my opinion, it's dubious at best to market it; unethical at worst to pawn it off as something that's good for the motor.



Other companies have pulled this kind of crap in the past. I will frankly remain thoroughly unconvinced and will purposefully steer people away until I see some good, solid, empirical data that supports its use.



Don't fix it if it ain't broke.



B

Heath

Well spoken.

nik

Just to add something to this, Mazda does reveal what they used on the lemans 26b engine. It's a chromium carbide based coating applied via detonation gun spray. Cr3C2 20% Ni-Cr



I am not an expert on this, but I did a little research and this seems like a fairly commonly used anti-wear coating in industry. I don't see why the companies that do this don't reveal the same information. Especially the ones that claim they are using the same coating as found in the 26b(JHB). I think the magic lies in making the process work, not in a secretive material.



I have direct experience with an FD road race engine that had cermet coated everything (by JHB) as well as ceramic apex seals. The engine performed flawlessly all season, and would likely have been reused had an oil line not blown and seized it after the season was over.

knonfs

The question is, how much better did it performed when compared to other rotary cars on the same category?

nik

It performed 100%(or 0%?) better as it was the only rotary car in that category



There is no question that there exists some kind of anti-wear coatings that do work. There is on-car data that show specifically that cermet coatings applied to a rotary engine (irons and housings) work, with ceramic apex seals.



The questions are:



1. Do these coatings work with steel apex seals?

2. What coatings are these companies using?