Glad to hear someone is actually claiming over 300 HP.
It's nice to know some consider it, even if jokingly, possible. Don't time sheets include the competency of the driver, along with tire and suspension set ups, in the equations?

That said, I believe the original point was that compartive dynos of wheel HP will tell the new owner the percentage of HP gains after tune and mods. But with accuracy only if done on the same dyno under the same conditions. The actual numbers don't matter as much as the comparative ratios they calculate. Parasitic drag is rather irrelavant to the equations.

No more, no less is, needed to acheive that "statistic" and in the end, that is all one would have, a calculated statistic.

So how much HP did your '04 have on it's baseline run? Or when you failed to hook up?