I probably won't be anytime soon. The 6265 works so well and the drive pressure so low I don't see much gain going to the 66 turbine. Over 70lbs/min and ex pressure to manifold pressure at 1.37:1 using cold boost as the reference is very good. I'm fiddling with my car right now prepping for Cecil trying to milk every bit of power I can out of it. If I make a full pass Friday morning it should be a good day. If I get any data it will only be intake pressure vs exhaust pressure and estimated mass flow based on fuel consumption and a/f.
BPE2013@hotmail.com