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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > First run with the N55 at the drag strip



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      04-29-2011, 10:46 PM   #1
DrMike
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First run with the N55 at the drag strip

2011 335i xDrive, Auto
Care is bone stock with RFTs.

My run is in the right lane. Left lane is a N54 E92 6MT with JB3 and DCI

Best Technique used: M1, brake torque to 2400 rpm, 1-2 @ redline, 2-3@6500rpm, 3-4@6K rpm

1/4 tank of 93.

There was also an N55 1er. The M5 ran a 13.2

Are trap speeds for the xdrive this low? My worst run of the night was a 14.0@96mph.
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      04-29-2011, 11:20 PM   #2
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Get that 60' time to 2.0's and you will be in the 12's no prob....were you spinning at all?
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      04-30-2011, 07:45 AM   #3
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Quote:
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Get that 60' time to 2.0's and you will be in the 12's no prob....were you spinning at all?
Looks like his 60' time WAS less than 2.0.
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      04-30-2011, 10:04 AM   #4
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Originally Posted by The HACK View Post
Looks like his 60' time WAS less than 2.0.
My best 60' of the night was a 1.959, but the trap speed is what sucked. Isn't it supposed to be 103-104?
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      04-30-2011, 02:29 PM   #5
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Quote:
Originally Posted by DrMike View Post
My best 60' of the night was a 1.959, but the trap speed is what sucked. Isn't it supposed to be 103-104?
xdrive is slowing you down up top. But those are good numbers stock.
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      04-30-2011, 03:54 PM   #6
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Originally Posted by shockin330i View Post
xdrive is slowing you down up top. But those are good numbers stock.
My goal was to break into the 12's with just a tune, but now I don't know if that will be possible... we shall see.
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      04-30-2011, 05:13 PM   #7
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My goal was to break into the 12's with just a tune, but now I don't know if that will be possible... we shall see.
Its possible. High 12 maybe.
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      05-02-2011, 04:09 PM   #8
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Humidity, D/A, elevation.. All significantly affect E.T's and trap speeds.
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      05-02-2011, 09:50 PM   #9
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Humidity, D/A, elevation.. All significantly affect E.T's and trap speeds.
Relative humidity was 58, how does this affect times/trap?

This was at Raceway Park in Englishtown NJ, which is pretty much at sea level.
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      05-03-2011, 06:23 PM   #10
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Quote:
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Relative humidity was 58, how does this affect times/trap?

This was at Raceway Park in Englishtown NJ, which is pretty much at sea level.
relative humidity is the amount of water vapor in the air divided by the amount of water vapor the air can hold at the said temp.
The warmer the air, the more vapor it can hold.

Basically, a relative humidity of 58 means the air is holding more than 1/2 the amount of water that it could theoretically hold. Any amount of water in the air will slow you down. This is why I think cars out in California trap so high.
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      05-05-2011, 12:22 AM   #11
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All I have is a tune and this is what I ran in my 2008 335xi coupe auto.
I raced at ATCO in south jersey
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      05-06-2011, 01:52 PM   #12
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Quote:
Originally Posted by Saviorx View Post
All I have is a tune and this is what I ran in my 2008 335xi coupe auto.
I raced at ATCO in south jersey
Now with that Tune, Xi really can put some decent power down.
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