What will effect torque while dynoing a car??

[B747crew]

I'm wondering what things can cause a car producing high RWHP to read low on the dyno for torque?? Tire Slipping at high HP ? Down force on the dyno ( not enoght weight in the rear of the car during the Pull ) ?? Combination of the two??

 

[jason6488]

horsepower is a function of torque and rpm over time. Assuming rpm increase remains linear your horsepower should drop too, relative to what it should be, if you suffered a loss in torque during the pull. Do you have a graph of the dyno run? im sure someone with experience running a dyno can chime in but if you have the data we could probably narrow it down to a few good theories.

 

[orange_whiner]

rearend gears