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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > How does this dyno chart look?



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      11-28-2012, 03:47 AM   #1
kelvin2010
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How does this dyno chart look?

2008 AT 335i

JB4
BMS DCI
BMW performance Exhaust
AR catless downpipe
ETS 5" intercooler
100% 92 Octane pump gas

Run#1 and #2 were map0
Run#3 and #4 were map2
Run#5 and #6 were map5
4th gear runs


****Don't know why every time it just shift automatically to 5th gear from M4 **** Any thought?


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      11-28-2012, 10:51 AM   #2
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Nice numbers. It's hard to read those charts because of how they scaled them, but those are very healthy torque numbers for the mods you have and the fuel you are running. Maybe a little too healthy. What correction factor was the dyno operator running? Anyway congrats on your numbers and taking the time to dyno.


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Originally Posted by kelvin2010 View Post

****Don't know why every time it just shift automatically to 5th gear from M4 **** Any thought?

When you dyno an AT, you put it in manual mode and hold it in 4th to red line. Even in manual mode, once it bounces off the rev limiter, it changes gears automatically. That does weird things to the dyno plot and fuel/air metering, so you have to either lower the test window RPM cutoff on the dyno or just disregard the very top of your curves.
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      11-28-2012, 10:58 AM   #3
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Put car in sport mode, when you floor it keep from hitting the kick down button, it wont shift up till 7k or you hit the shifter to make it.
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      11-28-2012, 11:30 AM   #4
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You guys dyno in 4th gear, not 3rd?
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      11-28-2012, 01:13 PM   #5
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      11-28-2012, 02:06 PM   #6
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Yep 4th
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      11-28-2012, 09:57 PM   #7
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Quote:
Originally Posted by eric@helix View Post
Nice numbers. It's hard to read those charts because of how they scaled them, but those are very healthy torque numbers for the mods you have and the fuel you are running. Maybe a little too healthy. What correction factor was the dyno operator running? Anyway congrats on your numbers and taking the time to dyno.


What do you mean a little too healthy? You think not very normal or the dyno is not correct?
I don't know about the correction factor...The guy who ran it didn't tell me anything and this is my first time put my car on a dyno, so I don't know too much...
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      11-28-2012, 09:58 PM   #8
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Quote:
Originally Posted by Goofyguy View Post
Put car in sport mode, when you floor it keep from hitting the kick down button, it wont shift up till 7k or you hit the shifter to make it.
Thats what that guy did..... I was using M4 not even DS....
but just shift automatically....very weird....
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      11-28-2012, 11:52 PM   #9
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380hp sounds great!
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      11-29-2012, 08:22 AM   #10
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if your in M4 but not in Sport mode the auto will still shift. If you pull the shifter into sport mode it will not shift until you either redline or press the pedal pass the downshift detent
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      11-29-2012, 09:59 AM   #11
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Quote:
Originally Posted by kelvin2010 View Post
What do you mean a little too healthy? You think not very normal or the dyno is not correct?
I don't know about the correction factor...The guy who ran it didn't tell me anything and this is my first time put my car on a dyno, so I don't know too much...
What I mean is that with the mods you have, those torque numbers are very good: on the high end. When a dyno operator tests a car, they go through calibration routine as well as tell the dyno software what the weather conditions are. This is vital, because the dyno's results are changed based upon the calibration and weather parameters. That's why comparing numbers between different dynos can be inaccurate. If you really want to see what power you have gained with mods, you should get a baseline of the stock car, and then compare those results under similar test conditions (ideally, same day, same dyno calibration).
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      11-29-2012, 02:10 PM   #12
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Quote:
Originally Posted by kelvin2010 View Post
Thats what that guy did..... I was using M4 not even DS....
but just shift automatically....very weird....
Even though you're still in manual you are still prone to kickdown and will still shift automatically. It's an auto. Manual mode it will only shift at redline.
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