I didn't really look at the small engine testing, although it seemed a single groove was best.
In the bigger car engines, it seems to make a "wild" motor (high compression, larger cam) behave better, this would let me pull more performance out of an engine and stay somewhat efficient.
I think I'm going to e-mail the guy named "automotivebreath". He has done it to a few chevy v8's including an LS1. I'll ask him how the motors have held up.
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