I'm running 12.5:1 comp ratio (not much room to go higher and still be streetable on pump gas), ported head w/+1mm valves, suzuki gsxr 1000 itbs (probably on the small side for this engine), Crane stg3 cams (not too big might go bigger), and big headers. I put a Supertrapp on the end of my pipe because I was at Laguna and I was also going deaf
I actually brought up the Dynapack 20% difference with the shop yesterday and this was their response
Quote:
With regards to different dyno's, there's a common misconception that Dynapack's read higher. This came about because of one SoCal dyno which was calibrated to measure flywheel hp/tq. I've personally used this particular dyno and compared it with mine using the same test vehicle. That one reads 18-20% higher. Since then ~2005, Dynapack has changed their software as well as their calibration on all their dynos to read actual hp/tq measured at the hub. The SoCal shop chose not to change their calibration. That said, in testing with other local bay area Dynojets, Mustang, Dyno Dynamics dynos, our dyno's variance is +0/-5% in comparison.