500 was the edge of grip rolling around in 2nd at like 30 and punching it on the 750s. 1st was a smokefest if you were not pointed absolutely straight. seemed like plenty at the time. enough that I would've gotten a lot faster just re-learning to drive.
I had it turned up to around 550 previously (but was not logging, no plots) for a bit and it was impossible to keep it off the rev limit in 1st. I needed a lot more practice. In 2nd hitting bumps in road could case the tires to spin at that power level. I don't think you need 600 to have any fun.

