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Originally Posted by dlavery
That is correct. This is a clear violation of <R31>.
Retiming of the motors is clearly a no-no (modifications of the electrical system are specifically prohibited). Turning down the case is clearly against the rules (the exact intent of the rule is even spelled out - and it is made clear that this practice is against the rule). Drilling holes in the case and adding fans to alter the airflow is a not a legal performance enhancement to the motors (it is not one of the permitted modifications to the motors).
-dave
[edit: yeah, Cory just saw the same rule]
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Dave,
During inspector training at either Sacramento, or SVR, we were specifically told that teams were being allowed to modify the casing of the motors by drilling/cutting holes in it(this was a rule that was very recently updated, as I recall). I think there may even have been a picture in the printed out slideshow showing a casing that had been drilled out. I was shocked that this was the case, and questioned whether having gaping holes in a motor casing would constitute a safety hazard. We never ran into such a situation, fortunately.