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| Rotary Tech - General Rotary Engine related tech section.. Tech section for general Rotary Engine... This includes, building 12As, 13Bs, 20Bs, Renesis, etc... |
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| Rotary Tech - General Rotary Engine related tech section.. Tech section for general Rotary Engine... This includes, building 12As, 13Bs, 20Bs, Renesis, etc... |
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01-08-2010, 05:40 PM
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#11 | |
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Rotary Masochist
Join Date: May 2008
Location: Floyds Knobs, IN
Posts: 494
Rep Power: 18  |
Quote:
Sure about that number? We had some plates ground a while back and took some measurements of re-ground used and brand new OE plates. We found a new set of OE plate to be about 12 Ra (micro-inches) on average. Our guy got the used plates to an average of 8 Ra. The rough correlation between the RMS and Ra is around 11%. So our measurements for the stock plate would roughly be 13 RMS. They look to good to be as bad as your measurement would suggest.
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