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Old 10-13-2012, 12:10 AM   #21
Shaolin CraneShaolin Crane is offline
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Not arguing, just stating my experiences. Probe extensively tests their pistons, something like 100k hours at red line. In some of the high winding motorcycle engine ive built I'd break a timing chain and the valve would leave its full impression on the piston. That bike is still going strong with the same owner who bought it from me 6 years ago. This was a 15:1 compression 36whp single cylinder thumper. Small impressions like that are nothing and have personally ran much worse for a similar amount of time. Gashed or grosh material removal anything where you can see that metal has been "moved" is the kind of stuff to look out for. Those are really no big deal. Its no difference then when a piston skirt has been shaved or valve reliefs have been cut or the dish has been opened up. I wouldnt worry about them even slightly. Hell the diesel guys take the 6.4 pistons and cut the dish open nearly 5cc then polish the edge and run 70-80psi on a hypereutectic.
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