well it was popping real bad on friday nite with the boost set @ 21-22 psi. I keep thinkin it was something in the tune . since it would run good @ 14 psi. So i got sat morning and started checking it out and it turned out the plugs (denso iridium's ur5's) that i put in feb were killed. I also noticed that it was leaking some oil on the trailer too that was not there when i loaded the car up friday nite. i thought it looked to be coming from the drivers side valve cover and just checked the bolts and snuged them up.
well i made 5 clean passes sun and every thing was good till the 6 pass and around 4k in second gear it blew the drivers side HG from what i can tell. The center cylinder when running and unplugging the spark plug wire makes no changes. It didn't show any spark knock on any of the passes that day till the 6th pass and it went crazy. the spark knock started @ 23 psi of boost. so i don't know if the knock occured and caused the HG to blow or the knock was ocurring due tot he HG bleing blown in the lifter valley of a busted piston etc. i put in 6 gallons of 114 octane gas and the car had maybe 3 gallons of 93 in it. thats all i can tell ya at this time.
I have about another 1.5 hrs worths of work to get the motor out and tear it down to see what actually broke. if it's a piston i'm just gonna have to let it sit until i can do a good build up on it.
BTW I have some good datalogs if anybody cares to look at them