Dont take it to the track. The timers will be wrong that day. It will show you much quicker than you actually ran. Fwiw the last KB supercharged Mustang i saw on the dyno made within 1 whp of what KB claimed it would.How about I post after going to the track and you find another thread to hate on til then. You and your buddy's opinions mean jack chit to me. The dyno sheet is there, there were several witnesses to the run. I'm well aware of dyno's reading differently and will count on the track. It's not lime I was bragging these numbers up, just reporting what happened at MY tuning session. Talked to another guy here this AM who had his 2010 kenne belle procharged mistake on the SAME dyno the day before I was there, at 18 psi he made 670rwhp. Sounds about correct to me. So for now why don't you GO AWAY.