I'm only getting 6300 with a Biela 22x10 on the G62. I'm wondering if I need more spark advance. It seems to have liked more when I over rotated the butterfly. What do you all think? Should I advance the timing a little more and see what it does? All I have to do is shorten the linkage a little. I can start it really easy now, so I don't think a little more timing at idle is going to hurt it.