Quote:
Originally Posted by MoreGAS
I'm not sure where you are located but we sourced a local heat treating Co. to do Rockwell C scale testing for us when we want to know how tired various parts are we are considering reusing or putting in to service or that we have welded on (heads) , when race engines are torn down. These were mostly aluminum components- Pistons. I'd call one of them and learn exactly what you are putting in there. Wouldn't be surprised if nice old used parts are a better choice.
Sad that we are at this point even with "Genuine" parts today, the repro parts situation is even more dodgey.
Kevin
GAS Motorsport
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Thanks for the comment, Kevin...I appreciate it!
I sourced a materials testing lab in San Diego that I might take the sprockets to for HRC testing. They charge $150 for up to six parts.
Before doing that, I ordered two sprockets made by Rauch & Spiegel that claim that they "are the good ones, made in Germany for us from the proper material with the proper heat treatment." However, I was skeptical of this claim.
Rauch & Spiegel on the left, new genuine Porsche on the right...
I didn't get a "real" scratch on the Rauch & Spiegel sprocket until I used the HRC65 file. The original part came in at less than HRC40. I think this confirms their claim that they are properly heat treated.
This settles it for me. I'm going to use the Rauch & Spiegel sprockets.