One of our customer's MKIV Supra Non-Turbo that we just finished work and tuning on made 215 RWHP on a Mustang Dyno, which is the known record.  The previous record we are aware of was 222 RWHP on a DynoJet, and DynoJets obviously show a good bit more wheel horsepower than any other load bearing dyno such as Mustang, Dyno Dynamics, DynaPack, Land & Sea, etc.    But, as we always say, a dyno is just a tuning tool.  Luckily this Supra is a road race car that is already known for out running some twin turbo Supras on the road course.  So, we'll see if it's track prowess can back up it's dyno glory!