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Old 24th July 2021, 10:27   #5
kaiser
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75 Tourer 2.5 Auto, 1.8T, 75V8ZT

Join Date: Jun 2007
Location: Johannesburg ZA
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Quote:
Originally Posted by trikey View Post
Don’t forget different dyno’s can give different readings, I was speaking to a bmw owner who ran his car on two dynos a week apart, one showed 530bhp the other showed 590bhp!
They normally apply a correction factor to compensate for losses, in order to give you an estimated output on the crank. So if you use 0,15 or 0,2, it will make a lot of difference. Many owners will happily walk home with a curve that shows a number of ponies more!

As for testing in 5th gear, that is totally impossible in the automatic 75, unless you can hold 5th, somehow?

The tendency is to gear down immediately there is load, even a light load.
So in an auto it will give you the whole spiel, in all gears.

in a manual, you select and it stays there, until you change your mind!
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