How to properly Dyno a N54 335is with DCT - BMW 3-Series (E90 E92) Forum

George@V · 06-21-2012, 10:16 AM

Looking to get some baseline dyno runs on a Mustang dyno in a few weeks and wanted to get some tips on how to properly dyno my 2012 335is (N54 engine) with the 7-speed DCT gearbox.

Any fuses to pull? Which gear is closest to 1:1? Thanks in advance.

Concentric190 · 06-21-2012, 10:32 AM

hold DTC until its all deactivated. Dyno in 4th.

George@V · 06-21-2012, 10:42 AM

Quote:

Originally Posted by Concentric190

hold DTC until its all deactivated. Dyno in 4th.

Thanks. Why do you recommend dynoing in 4th? I found the following gear ratio's online. Hopefully they are accurate.

DCT Gear ratios (overall):
I 4.78 (12.25)

II 3.056 (7.83)

III 2.153 (5.52)

IV 1.678 (4.3)

V 1.39 (3.56)

VI 1.203 (3.08)

VII 1 (2.56)

R 4.454

George@V · 06-21-2012, 10:45 AM

Another note. The Mustang dyno requires that you enter the weight of the vehicle. I'll be using 3600 pounds as the weight for my dyno runs (will remain a static number).

FYI, I've seen differences in the results from of this particular dyno if you change just the weight of the vehicle.

George@V · 07-30-2012, 08:57 PM

Update: Thread with Dyno Results of my car!

http://www.e90post.com/forums/showth...1#post12417321

06-21-2012, 10:16 AM	#1
George@V Private First Class Drives: 2012 335is Join Date: Dec 2011 Location: Boston, MA Posts: 195 iTrader: (0)	How to properly Dyno a N54 335is with DCT Looking to get some baseline dyno runs on a Mustang dyno in a few weeks and wanted to get some tips on how to properly dyno my 2012 335is (N54 engine) with the 7-speed DCT gearbox. Any fuses to pull? Which gear is closest to 1:1? Thanks in advance.
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06-21-2012, 10:32 AM	#2
Concentric190 Second Lieutenant Drives: M3 turbo Join Date: Mar 2011 Location: Willowbrook, IL Posts: 251 iTrader: (0) Garage List 1997 BMW M3 [0.00] 2009 BMW 335d [0.00] 1995 BMW M3 [0.00]	hold DTC until its all deactivated. Dyno in 4th. __________________ ///Andres 09 335d evolve tuned - 327whp / 490wtq -- 13.0@105 95 M3 Turbo - Built 3.0l s52, PTE74GTQ, AEM EMS & CDI

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06-21-2012, 10:45 AM	#4
George@V Private First Class Drives: 2012 335is Join Date: Dec 2011 Location: Boston, MA Posts: 195 iTrader: (0)	Another note. The Mustang dyno requires that you enter the weight of the vehicle. I'll be using 3600 pounds as the weight for my dyno runs (will remain a static number). FYI, I've seen differences in the results from of this particular dyno if you change just the weight of the vehicle.

07-30-2012, 08:57 PM	#5
George@V Private First Class Drives: 2012 335is Join Date: Dec 2011 Location: Boston, MA Posts: 195 iTrader: (0)	Update: Thread with Dyno Results of my car! http://www.e90post.com/forums/showth...1#post12417321