Originally Posted by TopgunZ

I was reading on the variances between Dyno Dynamics and DynoJets and it seems that DD's always read lower than the DJ's. I think we use DJ's here as the standard. That is what I last used for my car in Denver when I hit 490whp. Here on the DD I hit 527 but it seems all research says to add 10% to 15% to convert to DJ numbers. If that's the case and we use the median of 12.5% then my car made 593whp! Which actually feels more accurate on the street. The car seems much faster than the 37whp difference in numbers from DJ to DD. It feels closer to that 75-100 mark. I did make 4psi more.

Using the supra calculator for dyno differences I made 627whp but I don't think it is that high. Toyota Supra MKIV : MKIV Specifications

If you google "Dyno Dynamics to Dynojet calculator" you get tons of the same research that they read at least 10% lower.

Anyone have real world experiences with the differences on the Dynos?