Naw, no belt slip. I have a tensioner though, I know several guys slipping that don't have one.
I am happy with where its at. The power limiting factor in my setup is really the gargantuan cam, and the AFR 180 heads choking it up top. 614 RWHP is only about 20 RWHP off from where I wanted to be ideally anyway. I am happy with what it has made, and I doubt I will change anything up power wise to change it
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95 Z28 M6, 383, D1SC, FMIC, ect., ect., 614 RWHP with the stock PCM and pump gas!
98 Formula WS6 M6