Good to know but not always the right thing to do on a Dynapack Dyno. This would only work if the car was not making much power. The TQ multiplication through a first gear ratio would be pretty large. Assuming first gear was about a 3 and you are running through a 4.4 final drive your drive ratio would be 13.2. My dyno has a max TQ rating of 2,250ftlbs so a first gear pull would only work if the car was making about 170ftlbs of TQ or less at the motor.