I did t one point disconnect the maf and pulled the boost hoses right there at the charge pipes and they both were pushing air out when I reved the motor. the ps blew a little harder then the ds but not by much so I wrote that off. I just got back from doing some pulls across the bridge and back and she pulled hard goin thru the gears and I actually gou it up to 19psi, lol I do know that 10 psi with these 60mm compressor wheels feels like 16psi when they were stock. im starting to entertain the idea that going from stock turbos with tubular manifolds that spool the shit out of those little turbos to t28's with stock manifolds that are proven to be quite restrictive is a hell of a change. I ordered another set of megan manifolds and im gonna mach them up a bit. I think the only reason my last pair cracked( the ps cracked) was because I slammed into a wall back in feb and had to reshell my car so I thnk the stress of that played a big part. my ps motor mount was ripped clean in half and they were new mounts. nyway on with my quest....