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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 09-16-2007, 02:02 AM   #1
supra123
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How To Launch Properly? (6 SPEED MANUAL)

I was wondering what is the proper way to launch a 6 speed manual e46 m3?
Including rpm's, Shifting techniques, Clutch release, etc. Also was wondering if the launch control feature can be used with the 6 speed manual gearbox?

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Old 09-16-2007, 04:07 AM   #2
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Also was wondering if the launch control feature can be used with the 6 speed manual gearbox?
There are no computer controlled features on a manual device.... Just keep the traction control off.

Here's what i do and im not a professional.

keeps the revs at 3500-4000 and let out the clutch smoothly but not slow enough to slip it all day. If your tires are spinning you didnt let it out smooth and slow enough. If the car slowly leaves the line and your slipping your clutch too much, you are releasing the clutch pedal too slow. If your tires are begging for mercy but still holding a lot of grip on the road (80% or more), your doing good. The instant the clutch is fully engaged and the tires are not spinning, hold the pedal full down.

To get a real good launch, you will have to USE that clutch disc. Your starting off the line with the engine at full torque, and trying not to spin the tires, so the clutch has to do all the work in transmitting the energy.

For shifting, it just takes practise. From clutch in, off gas, shift gear, clutch out, on gas, it shouldn't take more than 0.5 of a second (thats a pure guess, i dont have a millisecond stop watch. but it should be one fast half second motion).
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Old 09-16-2007, 10:20 AM   #3
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Old 09-16-2007, 10:45 AM   #4
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if you practice...you'll know when you have a good launch...you wont sit there and spin tires but they will spin a tad.
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Old 09-16-2007, 01:48 PM   #5
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Thanks guys. Any more advice? Any 1 got any videos? Thanks
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Old 02-26-2013, 07:04 PM   #6
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At what gear to you guys launch from? 2nd?
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Old 02-26-2013, 07:11 PM   #7
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1st 1st 1st
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Old 02-26-2013, 07:14 PM   #8
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At what gear to you guys launch from? 2nd?
7th
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Old 02-26-2013, 07:17 PM   #9
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There are no computer controlled features on a manual device.... Just keep the traction control off.
False. Launch control on a manual e46 m3 has been done.

There's some software coding trick that can be done. I read it in a post by Evolve tuning last night, ill have to find that thread again
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Old 02-27-2013, 11:02 AM   #10
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Launch control can't really work on a manual transmission, because clutch engagement isn't controlled by the car's computer. It's controlled by the master control unit in the driver's head. You will get very good acceleration times by launching at 3,500 rpm (which is 1,200 rpm shy of peak torque), but you will be replacing clutch plates with relatively high frequency. Remember that at a 3,500 rpm launch, if your tires aren't burning, your clutch plates are slipping.

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Old 02-27-2013, 11:26 AM   #11
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Launch control can't really work on a manual transmission, because clutch engagement isn't controlled by the car's computer. It's controlled by the master control unit in the driver's head. You will get very good acceleration times by launching at 3,500 rpm (which is 1,200 rpm shy of peak torque), but you will be replacing clutch plates with relatively high frequency. Remember that at a 3,500 rpm launch, if your tires aren't burning, your clutch plates are slipping.
By launch control I mean that you can code the computer to limit the rpms while the clutch is down (like how you can't rev past 6k in neutral). Set it to 3500 rpms so when the pedal is to the floor the motor is at 3500 rpms, release the clutch and you have launch control
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Old 02-27-2013, 11:40 AM   #12
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By launch control I mean that you can code the computer to limit the rpms while the clutch is down (like how you can't rev past 6k in neutral). Set it to 3500 rpms so when the pedal is to the floor the motor is at 3500 rpms, release the clutch and you have launch control
I believe that is called 2-step.


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Old 02-27-2013, 11:54 AM   #13
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Old 02-27-2013, 11:08 PM   #14
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By launch control I mean that you can code the computer to limit the rpms while the clutch is down (like how you can't rev past 6k in neutral). Set it to 3500 rpms so when the pedal is to the floor the motor is at 3500 rpms, release the clutch and you have launch control
That sounds like it will introduce problems. Presumably you could not rev match on a downshift if RPMs are maxed to 3500 when in neutral (clutch depressed or mid-shift through neutral to lower gear)? That sounds like a recipe to lose the rear if downshifting in a corner... might you even slow yourself when up-shifting from 8000 to next gear? I think 3500 in third, for instance, is slower than second near red-line.

Call it "launch control", but it sounds like tard-proofing.
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Old 02-28-2013, 09:47 AM   #15
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That sounds like it will introduce problems. Presumably you could not rev match on a downshift if RPMs are maxed to 3500 when in neutral (clutch depressed or mid-shift through neutral to lower gear)? That sounds like a recipe to lose the rear if downshifting in a corner... might you even slow yourself when up-shifting from 8000 to next gear? I think 3500 in third, for instance, is slower than second near red-line.

Call it "launch control", but it sounds like tard-proofing.
Call it whatever you want but this is something Evolve said themselves
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