Im going to the Street Machine Nationals at Firebird Raceway in Boise, ID this weekend. It will be the Evo's first time at the track. My question is about boost, with race gas. Im a little nervous about my tune. Ive got a Jestr email tune, and it knocked a little when I first got it (91 oct). I backed the timing off a bit in the areas of knock. Ive got my boost set to peak at roughly 21 psi, and tapering to about 18 at redline. If I feel like I need a tenth or two to be competitive, would you guys reccomend bumping the boost a couple psi, with the race gas? I dont have a wideband, and no way to log while Im racing. I wish I could get a hold of some gas before I go, but even if I did that, it will be about -3,000' elevation difference, and about 10-15 deg hotter at the track than where Im at right now. Im pretty sure Im not allowed to put the laptop in the passenger's seat on the track.

Thanks in advance for any advice.
CB