I see alot of generic and complicated threads of launch teqniques. I dont think you can justify a perfect lauch by simply stating a rev number and a swift release of the clutch. The effectiveness of the launch is based on your surface,your tires/pressures, ambient temperature turbo size and suspension setup. Spinning your tires and making a bunch of racket may seem faster but if timed is not. The optimal way to achive the best launch is to practice in varying conditions. Most of you guys have modified many areas of your cars so its tough to say which method works best specifically for your individual specification.

 

/thread

 

i think the effectivnes on the launch, comes much more simple explanation, correct clutch and throttle operation. Basically we use the e-break to find a proper grip on the surface and pre load the drive train for less stress. But the launch it self is nothing but clutch and throttle handling.
And as you mentioned the rpm and clutch grabbing can and it is vary because of other circumstances, for more vivid example snow vs dry tarmac and so on.
That is why the e-brake is a great help to find the right launch set up each launch you do.

 

The operation of the ebrake does not effectivly tell you as much as you would like about your grip. The grip generated by your tires is based on the weight transfer on to the tires. The rear of the evo will always indicate significantly lower girp that what is possible to attain if you were to properly tranfer a significant amout of weight to the driving wheels during a launch. I agree with you on the preload of the drivetrain, it is an important factor when considering a good lauch aswell as increasing the available boot offline. However you optimal performance wont come from judging your girp levels by locking your unloaded rear tires. Perfect practice makes perfect.

 

well... this is how many of thousands rally drivers do it all around the world a last at least 50 + years and still with the best launch control on the WRC cars the hand brake is in use at launch , including WRC world champions etc. that is why we call it a hand brake launch, without you will keep nicely and steady rolling forward or back depends on the slope or the power you put on the wheels.
You dont judge the grip with the hand brake, you keep the car still with it, if that is more understandable. Since, as soon as you got a right grip the car would move forward slightly, which you cant do, no rolling start, so you stop the car with the hand brake, not with a brake pedal, and keep it steady untill you green

Also the evo is not RWD car so you dont really need to pay attention on the rear wheels get loose. You need to pay attention on the front wheel not to get loose, that is the best way to find a right grip, but we start to going to more like an advanced course here

 

3000-4000 your car wont really launch it will bog, roll, then go. 5000 rpm is your best bet, dont let your foot of the clutch completely, just sorta slip your foot off. between 6000 and 7000, you will hit your launch control also known as two step thats when the fun begins, but yea you alwasy burn a little clutch launching

 

Like everyone else says, rev'ing too high just straight up doesn't work. Even with a street clutch, "slipping" into a launch works best. I always did it around 4,500rpm.

 

Since, as soon as you got a right grip the car would move forward slightly, which you cant do, no rolling start, so you stop the car with the hand brake, not with a brake pedal, and keep it steady untill you green


Can you lay out the sequence of events using e-brake.
@ what point is the e-brake released?

thanks

 

When the car starts inching foward you pull up the e-brake and release the clutch a bit so it isn't dragging. Then you get on the 2-step and you release the e-brake while you're releasing the clutch.

 

Thanks, looks like it will take some practice to execute smoothly.

 

Riding out is best way every car is fairly different so do what works for you.

 

do you get any kind of advantage on launching or shifting with a bushwacker trans from buschar racing? i just bought my evo IX a few months ago and it came with that trans.

 

If it has an LSD or a 4.11 final drive then yes, there is some advantages to be had. Your car comes stock with a longer 1st gear than VIII's so your already better off. Other than that, peace of mind is the biggest advantage. You have a well built transmission that will take your gear banging (if your on a Ricky Bobby level).

It is amazing reading peoples write ups from back in '03 all the way to a few months ago on the "proper launch". I am not even going to attempt at explaining it. If anyone is unfortunate enough to find themselves on this thread..Watch my clutch foot in these runs: http://www.streettunedmotorsports.co.../jesse_tsi.htm This was from when I had my 2G, I don't have any incar GoPro footage in my Evo yet but my skills hath improved These were 1.7 60fts w/welded center diff

 

why doesnt anyone use the 5500 rpm launch control were your car bulids boost also at about 5-7 psi

 

?? Pretty sure we all do.