Then you are making 'normal' whp without tune like the rest on this so called low dyno. But you are gaining too little gains with stg1/2 (shud be 290 to 300whp) more so with is38.
I have no doubt that he is down on power from what he should be, but measuring wheel HP with different types of dyno's can make a huge difference.
My 2006 BMW 330 was dynoed using a Mustang dyno. Yes, it's only naturally aspirated 3.0 liter in-line six, so the quoted HP from BMW is 255hp. I have a Dinan CAI, throttle body and exhaust along with an AA tune. I made only 206 RWHP at VAC in Philly. But when I'm on the track, I am keeping up with non-tuned 335s without a problem in the straight line.
Also, a friend of mine has a supercharged e90 M3. At VAC he made 150 HP LESS than he did on another dyno. http://www.1addicts.com/forums/showthread.php?t=214597
There is something wrong with that dyno maybe its really out of calibration. Find a dyno jet and set the correction at SAE and make a few runs. You should be putting out at least 330-340whp
