I am running advance four, which seems to be great cruising, but I have tried six and it seems to really bring out the top end when you want to wined it.
I did have to change the starter to the four pole and it fixed my problem <<<---- earlier post. I have it on curve 5 had best luck with it so far, I havn't played with it much though although you lose a lot of top end with 6-8 if you dont have extremely high compression 14:1 or higher. No problems with it though definitly needed for rev limiter and higher compression engines. So far 10.85 @ 123 with street tire.