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Originally Posted by 59bhp
From what i've read on the subject it is more of a "belt and braces" situation than a magic wand so to speak (like most hardening processes).
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Belts and braces is exactly what we're looking for. We're doing Pro-AM and going out to one event costs more than it would to treat the entire motorset. So, if something like this does help in keeping the motor in good shape, why not at least experiment with it?
An update for the Zilvian information highway. Blocks, cranks, everything can be treated, but in some cases it is not recommended. Aluminum blocks with steel sleeves can end up in severe cracking because of the different temperature expansion of two different metals. So, if you were to take on this process you would need to bore out the sleeves, treat it, then press in new sleeves. From my understanding, almost all metals benefit from the cryo-treating process, but the benefit may never be realized. This process benefits any metal that rubs or wear, or is subjected to extreme temperatures. Pistons, rings, valves, and bearings are all good places to start.
When I build my next motor I'll have this done and post up details.