thanks guys just wondered if there was a low boost gain with my setup going with these turbos. the 6031 i have is a monster at 17psi 23/21 timing. already snapped a forward drum and twisted a slip yoke. so went with a full billit tranny. what times with a good 60 could i net with this 6031. at 23 psi? no roll bar but would like to get a 10.99 once. i usually tune while i drive to the track long, long straight back road trip