Reply to "Dyno run gone bad"

George PAdmin.

All engines are connected to the tires via a gear reduction, even in a 1:1 transmission situation, due to the ring & pinion. Tires never turn the same speed as the engine. In a performance car the "final" ratio is usually between 3:1 to 4:1, even in overdrive.

A chassis dyno is far more honest than an engine dyno in terms of determining a vehicle's ultimate performance because it relates to you what the car is capable of putting to the ground, via the drive train and tires (track testing at the hands of a skilled driver is even better). But, thanks to the aftermarket, the motoring world is dyno crazy.

Which do you think is better, a 400 horsepower engine connected to the road via Pirelli P Zero tires, or a 600 horsepower engine connected to the road via BF Goodrich TA radials?

10/26/1510:17 PM

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