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      06-18-2019, 07:18 PM   #1
bimmer813
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Drives: 2023 M4, 2024 X5 M60
Join Date: Mar 2016
Location: Tampa, FL

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Z4 M40i Dyno! Thoughts?

https://g29.bimmerpost.com/forums/sh....php?t=1621271



Obviously people will argue regarding drivetrain loss forever, so let's just do the numbers based on the average numbers of the three runs:

Horsepower (HP):
10%: 405
12%: 412
15%: 423
18%: 434
20%: 441

Torque (Lb-Ft)
10%: 455
12%: 463
15%: 475
18%: 488
20%: 496

Personally, I think these modern automatic transmissions are incredibly efficient. I think 15% is the maximum loss to consider.

Irregardless, WHEN WILL ONE OF THE BIG MAGAZINES DO ACCELERATION TESTS?!?
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Last edited by bimmer813; 06-19-2019 at 04:32 PM..
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