CA Automotive Claiming 60 hp gains on pump gas with their Stage 2 M5/M6 V10 S85 tune?
Here we have graphs on a dyno dynamics of the Stage 2 tune from CA Automotive. This Dyno is obviously set to read high as they are not making 538 whp, impossible. The dyno is corrected but we have no idea just how high the correction factor is. The gains are claimed on 93 octane but we just don't find these numbers possible without huge correction factors to exaggerate the gains on what is a notoriously low reading dyno.
CA automotive says there are no tricks or exagerrated correction factors here, but clearly, that is exactly what they are doing:
Here is what a modified M5 really looks like on a dyno dynamics, this one with aftermarket exhaust:
The gains here are exaggerated and not an accurate representation.