Reply to "Dyno run gone bad"

Trying to do a speed run on a dyno is a really bad idea (obviously) and in my opinion utterly pointless. A round roller cannot begin to simulate driving on a road and often the cars will be strapped so that there is more downward force for traction. This in itself increases the loading on the tire. The round roller causes more tire deflection which causes more heat. Our dyno actually had a safety that would only allow 120 mph. If that was exceeded the dyno would apply the brake and you would have to come to a complete stop before it would allow another run. Even at those Speeds I have personally witnessed a tire failure. This was on an extreme HP drag bike with softer tire compound. There was still rubber embedded in the ceiling tiles when we tore out the cell. Moral of the story is only run a gear high enough to maintain traction and keep the run length to a reasonable amount of time as well as allowing cooling time between runs.