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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > Procede V4 AT Launch Logic



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      02-04-2010, 07:32 PM   #1
zke36
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Procede V4 AT Launch Logic

Im sure most of you with V4 or any tune have noticed this by now but 1st gear is pretty useless. Heck, i get plenty of slip in 2nd (stage 1). From what I understand we have 3 options here for maximize our off the line.

A) try and control first
B) rev launch @1500 rpm in 2nd off the line
C) utilize procede 1st and 2nd gear torque settings to optimize

Anybody have any luck with user adjustable torque? There has to be some optimal setting to knock some time of the 0-60 and 1/4 miles.
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      02-04-2010, 09:37 PM   #2
orionredwing
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Everything I heard was to launch in 2nd gear. 1st gear is so short.

When I went to the Infineon Wed Night Drags, I tried 1st gear. It was so short, I auto-shifted into 3rd twice, which killed my times. (it auto-shifts into 2nd right when I upshift, equals 3rd).

Just launch in 2nd gear Think of it another way, if you have enough tq to slip in 2nd gear, then that's enough torque to launch!
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      02-04-2010, 10:50 PM   #3
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Quote:
Originally Posted by orionredwing View Post
Everything I heard was to launch in 2nd gear. 1st gear is so short.

When I went to the Infineon Wed Night Drags, I tried 1st gear. It was so short, I auto-shifted into 3rd twice, which killed my times. (it auto-shifts into 2nd right when I upshift, equals 3rd).

Just launch in 2nd gear Think of it another way, if you have enough tq to slip in 2nd gear, then that's enough torque to launch!
And the 0-60 times are? BTW, I think it's time for some track wheels and tires for you.
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