We race a Big Wheel Supermini. I think we've got the gearing where we want it (14-52) but still looking for more low end out of the turns. Motor is 85 bored to 100, HotRods stroker crank, ported and polished and 85 head milled to fit bore & stroke, FMF exhaust. After reading some comments on here I was thinking about the PC Power Valve and the Phathead head. Should I do both, one or the other? The thing I most confused on is the Phathead stuff. If I'm looking at it right think I want to use the 2 or 3 dome (I use and 50/50 mix of 93 and 110 fuel) and do I go with the o-ring or head gasket? Maybe we just need to work on skills but he always complains of the bike not coming out of turns like he wants. For example there are 2 sections of a track we ran last weekend that if he takes the middle or outside line he was good but trying to take the inside he stuggled to clear the next jump. We haven't tried a 13-52 setup but that seems like it will take too much off the top end.