Every dyno is calibrated differently. As well different dynamometer manufacturers use different specifications on their respective products. If there was a World Federation of Dyno Calibrators and each time a dyno was set up an official from the WFDC had to approve it's settings, then the number would be comparable. 200, 230, 500....it doesn't matter unless you go back to the same guy.

 

here is my dyno plot. stock my 5at put down around 220-225hp. then i dyno'd with intake, plenum, ecu, cats/exhaust, and only gained 25hp. i've noticed that the z will make the most hp/tq after the first/second run and then dips a couple hp and stays steady through more runs.

 

No the 233 was the from the pulls in 3rd. The ones from from 4th are whats posted from the dyno sheet.