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10-25-2010, 11:21 PM | #1 |
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Launch Control - Proper Launch?
I need to learn to how launch this car as best as I can off the line with street tires. I understand this is not a drag car
In drive mode (D5) when I go to mash the pedal right off the line, the car does it's version of a launch control. The rev's shoot up instantaneously near the redline, and then the car begins take-off, spining like crazy. No good there, don't like that. Then I tried rolling into the gas pedal in D5. This of course did not produce what happened above, but the car just bogs bad launching this way. It's nice in the sense it's a clean launch with no spin from the tires, but it's just really sluggish taking off. Doesn't have any gusto. Both of those methods are with DSC turned off. Then I turned to launch control. Flag comes up, I pull the lever on the left side of my steering wheel (beneath the blinker lever) so I can launch at a lower rpm rather than the default of 5,500 rpm's or so. When I pull the lever in (towards me) nothing happens, atleast I didn't notice anything. I tried it earlier tonight and the car launched but tons and tons of spin. Am I doing something wrong in trying to adjust the rpm's for launch control? What do you guys find is the best method to take off from a stand still? |
10-25-2010, 11:50 PM | #3 |
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Did you pull the right lever to drop the RPMs? I've never done it but I've read the manual and that's how it's "supposed" to work. It sounds like you're getting the launch control to work properly, just not the RPM adjustment.
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10-26-2010, 12:38 AM | #4 | |
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Felt good though, just spinning a little too much. Thanks |
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10-26-2010, 07:13 AM | #5 |
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10-26-2010, 07:15 AM | #6 |
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I couldn't get the rpm down as far as I would like when I used the lever. But then, launch control is for wheenies anyway. Learn to apply the throttle in first so that you get the launch you want.
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10-26-2010, 07:31 AM | #7 | |
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If you hammer it from a stand still, the revs will shoot up to 4000, then the clutch will let out. There will be some spin/hop, but better than with DSC off. If you're quick, you can cut back the throttle some just before the clutch lets out lets out the get it closer to perfect. This kind of simulates having a manal tranny and good feet. This has been referred to elsewhere as the "poor man's launch" |
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10-26-2010, 11:01 AM | #9 |
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I have been expermenting with this for the past 11000 miles. me too wanted a clean but super quick get away from a stand still. here is what I finally found to be the best.
MDM provides more libral power to rear tires than DSC so you don't get the chacking start but it also prevents excessive spinning. the key is, when you apply the throttle you have to commit to it. if your foot hesistated the car will bog, so just start and keep pushing through the initial bogging. it'll take you several attempts to get it good but again: D5+MDM+sport plus+commit to throttle pushing through any bogging= quick, no spin, no prerevving launch. this is not the fastest you can get out of your M3 but it is the best you can do from a traffic light.
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10-26-2010, 11:24 AM | #10 |
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i didnt even know this could be done wit DCT
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10-26-2010, 01:00 PM | #11 | |
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Last night I was trying D5+MDM+sport plus. I was definitely getting a bog off the line. I think the commit to throttle pushing is the key to where I need to improve my off the line launch. I tried 2 methods in these settings, one was just mashing the pedal off the line like I mentioned in an earlier post but that just loads the rpm's rather high and creates a wild launch control launch with not much accuracy or traction in the launch. And the 2nd method I was easing into the throttle as I accelearted off. When you launch, are you committing 50% throttle right from the beginning(stand still) and then easing into the remaining 50% as the car accelerates? I was trying that but i was getting a bog. This weekend I'm going to be at California Speedway. The first 60ft. is what I need to refine. If I can get a 1.9X 60ft. in this car come this Sat, I think I'll have some nice 12 sec E.T's. |
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10-26-2010, 01:04 PM | #12 |
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also known as 'launch control for dummies'
in all reality you really should only launch it the way the manual says. turn off DSC - hold the right paddle in until you see the flag... floor it (while still holding the right paddle) then release the right paddle and let the car do the work. you should not be shifting on your own. you may also want to refrain from doing this too frequently as even the manual states it can wear out the hardware much quicker and leave you with a face like this:
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10-26-2010, 01:18 PM | #13 | |||
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10-26-2010, 01:28 PM | #14 |
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Good comments and info from everyone.
I just want everyone to know I created this post not to imply I'm going to launch like this from stop light to stop light seven days a week. Rather those 1 or 2 occassions where I need that excellent launch, it's there for me. I think the LC would work really well if this car can launch at 3,000 - 4,500 rpm's. Anything behind that IMO on street tires, the car's simply going to spin. The spinning is what's going to kill my 60ft. times. I don't think track prep will be bad this Saturday, it's usually prepped okay. The fact that I'm running street tires though is going to require using some skills off the line. I'm going to try out the methods given to me in this post and I'll definitely share with everyone what I feel works best. |
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10-26-2010, 01:45 PM | #15 | |
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10-26-2010, 02:18 PM | #16 | |
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you are correct - s6 mode - apologize for the oversight steps direct from the manual: 1. press brake while engine is running 2. deactivate dsc 3. select drivelogic 6 4. w/ vehicle stationary press selector lever forward and hold. flag symbol appears. 5. press accelerator down all the way - engine speed is controlled (thus my statement of not shifting on your own) a. use the same lever to change drive-off speed by 100 rpm increments up to 500rpms 6. this whole time you will have still been holding selector lever forward and now will depress accelerator all the way down. 7. release lever and car accelerates under launch control. i didnt realize i was putting paddles in the mix - apologies on this as paddle versus lever could make things a bit difficult to accomplish launch control properly for the online manual visit the link already previously provided here: http://www.bmwusa.com/Standard/Content/Owner/dgh.aspx select year and make and search for 'launch control' for step by steps with a couple diagrams to help out. thanks for catching the mistakes for me mkoesel - not really an area you want to goof up or it could lead to problems for the car.
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10-26-2010, 02:44 PM | #17 | |
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10-26-2010, 02:51 PM | #18 |
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I don't use LC. But like mkoesel said, what I do is stomp the gas, feather the throttle until you get traction and then apply the gas again. Don't forget to shift, it's embarrassing to hit the limiter
LC will always give wheelspin unless you have warmed up tires and the asphalt is hot. Manually launching with DCT takes some practice just like with 6MT but once you get the hang of it you'll be setup faster than going through the LC steps. |
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10-26-2010, 03:03 PM | #19 | |
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10-26-2010, 03:35 PM | #20 | |||
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10-26-2010, 06:01 PM | #21 | |
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as far as launching in LC - i have only done it 2x. I have owned the car less than 4 weeks so still getting used to its little ins and outs. so far its a fantastic car!
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10-26-2010, 06:30 PM | #22 |
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Guys....you are making this way too hard. I drive my DCT all the time ready for lauch control. Not that I do it very much....but it give the overall best 'throttle-blip' downshifts in the most agressive settings. When I want all I do is tap the brake and hold the DCT shift lever forward. That gives the 'FLAG' and I'm ready to launch for maximum performace. My car works best at 4500 rpm with the PS2s. It has been over two months from my last Launch....but ready anytime I want.
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