Lol...I don't even mess around with HT anymore. I'll be using this bin as a base for tuning...http://forum.pgmfi.org/viewtopic.php?t=6711&highlight=...and having it tweaked around to suit my setup at a local shop with a dyno. I think max I'll run is 6psi though, maybe 8 if I feel daring, and shoot for a nice 10.5-11:1 afr just to be on the safe and conservative side.