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Old 03-06-2014, 11:16 AM   #12 (permalink)
Motion Lab
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Join Date: Jul 2012
Location: Charlotte, NC
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Drives: Nissan 370Z
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Quote:
Originally Posted by elperuano View Post
5th gear?
Correct, 5th gear pulls. When running a car with inertia it is important to pick a gear close to 1:1 to prevent inflating the numbers. The gear ratio essentially can act as a multiplier depending on how the car is being tested. On a 370z 6speed I have found the following ratios:

1st - 3.794
2nd - 2.324
3rd - 1.624
4th - 1.271
5th - 1.000
6th - 0.794

So thats why we opted for 5th gear pulls versus 4th gear! If we were using the PAU to apply load we would have most likely tested in 4th gear.

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
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