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      06-27-2012, 02:12 PM   #23
SpeedDemon7
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Drives: 335i E90
Join Date: Mar 2012
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Quote:
Originally Posted by z4z4z4 View Post
I have no DCT dragstrip experience, but I'd like to hear from you after trying the DCT launch control program per the owner's manual:
Launch Control is available when the engine is
at operating temperature, i.e., after driving continuously
for at least 6 miles/10 km.
1. With the engine running, depress the brake
pedal with your left foot.
2. Activate the SPORT+ program of the Dynamic
Driving Control, refer to page 78.
3. With the vehicle stationary, activate manual
mode and select first gear.
4. Press the accelerator all the way down. The
engine speed when driving off is controlled.
A flag symbol appears in the instrument
cluster.
5. The vehicle accelerates when you release
the brake pedal. Keep the accelerator
pressed all the way down.
6. The transmission shifts up automatically as
long as the accelerator is pressed all the way
down.
Launch Control only becomes available again
after a certain distance has been driven.

ALSO, I'd like to know if you're logging your JB4 at the track?
You may be pulling timing from not turning off DSC with a long push of the button, which conflicts with the use of launch control which requires Sport+. Traction control activity is interpretted as engine KNOCK by JB4 and the tuner pulls timing to protect the engine.
Unfortunately I was not logging. I wish I was so I can further diagnose. But I was thinking of pulling the DSC fuse and seeing if I can still use Sports+ mode along with the factory launch control. That might be the reason why DSC kicked while launching in Sports+ mode...

The checkered flag did come up but at times the dsc would interfere with the launch for some reason, thats why I was trying to figure out a technique to launch with all traction assist turned off.
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11' Z4 35i Procede REV 3 SOLD
2007 e90 335i 6MT:Procede REV 3: Raceland 2.5": VRSF 7":VRSF CHARGE pipe: Walbaro 255 inline: ACT 6 Puck: 100% e85

Last edited by SpeedDemon7; 06-28-2012 at 01:21 PM.