You're right JHM. His initial dyno number is low. But that may be due to the dyno - different brands read vastly different numbers. I can never remember which brand reads high or low or whatever.

Probably the best way to compare the numbers to crank numbers is to assume that Franc's car was running at manufacturer's spec when he initially had it dyno'd. So it was producing 215 crank hp and dyno'd at 154 whp.

After his mods, he dyno'd at 193.5, which is a 39.5 whp increase, which is a 25.6% increase over his stock numbers. If we increase the stock crank hp (215) by 25.6% that gives 270 crank hp. That's still not 290, but what the heck.

Franc: were your dyno's both done on the same day? Did they dyno it stock, then put all of the mods on it and dyno it again? Or were they different dynos on different days?