[andy669]

I have 24 hour access to a DynoJet at my friends shop. I have Dynoed several cars down there. When I was at WFC this year I was having some troubles with my car so I decided to use the mobile chassis dyno that was there. While I was waiting in line I was listening to the car before me, and it sounded strange. After listening to the next 2 pulls I figured out that they were letting the motor backwind for a few seconds before hitting the brakes on the dyno. I asked them why they would do such a silly thing and their response was, "to save the brake pads on the dyno".

I explained to them that letting a motor backwind is extremely hard on the motor, and that I would not be doing the same. As soon as I let off the gas I push the clutch in, pop the trans in neutral, and let the dyno brakes slow the tires down.

Needless to say, this crew was fairly new and did not quite know what they were doing. They said they had been doing this for a few months, but it seemed more like a few weeks.

Thats about all I can add. Everyone else had good suggestions.

Andy