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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > Powershifting?



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      10-20-2010, 08:22 AM   #1
D_o_S
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Powershifting?

Hi guys,

is it possible to shift in our cars like this:

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      10-20-2010, 09:12 AM   #2
Harbringer86
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Yeah just put it in DS and floor it.
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      10-20-2010, 03:31 PM   #3
mike-y
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you are probably going to have to remove the clutch delay valve if you want to even think about shifting that fast.
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      10-20-2010, 03:36 PM   #4
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Why would you want to shift like that?
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      10-21-2010, 09:37 AM   #5
D_o_S
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Quote:
Originally Posted by Harbringer86 View Post
Yeah just put it in DS and floor it.
Quote:
Originally Posted by Geby-E90 View Post
Why would you want to shift like that?
Manual, why not? Seems like the fastest way of shifting to me?
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      10-21-2010, 10:36 AM   #6
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Quote:
Originally Posted by D_o_S View Post
Manual, why not? Seems like the fastest way of shifting to me?
FWIW the Transwiki says this:

Quote:
Power shifting

This is an advanced technique that gives a speed boost to the car when upshifting. This should only be used in racing applications (and probably only in very short races), as it is very hard on drivetrain components, especially if done improperly. Even done properly, it generally puts undue stress on the drivetrain, and shortens the lifespan of the driveline components.

To perform a power shift, keep the gas pedal on the floor (instead of lifting) while pushing in the clutch. At the same time, quickly shift to the next gear. Quickly re-engage ("pop") the clutch as soon as the new gear is selected. If done properly, the car will receive a "bump" in acceleration (due to the jerk of the decelerating engine) as the clutch is re-engaged. If done improperly, it can result in engine or transmission damage, sometimes catastrophic.
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      10-21-2010, 05:14 PM   #7
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high risk, low reward
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      12-08-2010, 09:10 PM   #8
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power shifting

Unless you have a lot of money to fix broken trannies do not power shift. It is abusive on any transmission at any price level. I learned from my Mustang days but it took 3 busted second gears to get it right. It does have rewards for someone racing heads up to a closely matched competitor at the track. Other than that stick to a quick shift.
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      12-14-2010, 11:59 AM   #9
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This was absolutely mind blowing for me, until I found out it was KPH
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