Originally Posted by Dave07997S
To be off by almost 40rwhp is a ton, unless the dyno operator did something wrong.
Exactly, this is what worries me most. It is so far out of line that it cannot be explained by production variance. Also, 91 octane is the highest out here. I saw an article of how octane and altitude interact but can't find it now. To really make me cry, here are the unadjusted results
The dyno shop has done 50+ E9x M3 runs and showed me some of the other results under similar conditions. The other cars were around ~340whp.