Quote:
Originally Posted by Stealth ///M
Isn't the 1:1 gearing reached in 4th gear...?
Hence why we dyno the car is 4th..
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The torque multiplication will not be reflected in any gear on the dyno. Otherwise, you would get something like maybe 1000 lbs torque in 2nd gear and 250 lbs torque in 5th gear. The dyno chart will reflect engine torque, not transmission and differential multiplied torque, but the dyno chart will show that engine torque reduced by the drivetrain drag losses.
You can dyno in any gear you want. I have dynoed in 3rd, 4th and 5th, without seeing any dramatic differences. The 1:1 gear is often chosen because it should be the most efficient gear since there is no step up or step down that consumes a little power.