Best method of launching?

Road race, Auto X, or the Drag Strip

Postby All Fours » Fri Jan 20, 2006 10:16 am

I might just add my 2c to this rather old topic

The launch technique I found best was simply a clutch dump from about 5,500rpm. Gives a bit of wheelspin - which you want, this is on the Meremere that was being complained about earlier :D

With a full faced kevlar clutch disk and heavy duty PP, using this technique I managed a 1.746 60ft, the 3rd on http://www.gtfour.ca/race.html despite only being the 15th fastest 1/4 mile (and only 0.043 from the best 60ft)
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Postby slick1851 » Thu Jan 26, 2006 4:16 am

InitialD93 wrote:i have dumped the clutch at revlimiter before with still no wheel spin... still bogs a bit but thats at the race track... never dumped it on the street



Your tranny will thank you later for that im sure, They way you launch a awd car is to rev it up a bit, depends on your setup and what rpm you think is best.

Dont dump it like most people say, you never get a clean launch like that, As you rev it to lets say 6,300 let out the clutch slow then very fast. Slip it just a little and they let it out fast. Its not to easy, and back in the day I had to learn how. Who ever is say just dump well go ahead, STI have reved it up and just DUMPd it. Geuss ill still out launch them...Rember Little slip and then let it out.
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Postby All Fours » Sat Jan 28, 2006 1:05 pm

slick1851 - what's your best 60ft using that technique? Clutch dumping has served me very well with a 1.7
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1989 ST185 - 13.1 @ 165kmh - FMIC, I/E, MHG, 16psi on t04e comp. ct26, RC front, + weight reductions - stock ECU and fuel systems
1989 AW11 - 3sgte powered, CT20B, RC W/A IC, 3" DP and exhaust, LSD
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Postby fsmtnbiker » Sat Jan 28, 2006 1:40 pm

slick1851 wrote:Your tranny will thank you later for that im sure.


Actually, our cars aren't DSMs and don't typically have any trouble with broken drivetrain parts... Regardless of abuse or power.
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Postby All Fours » Sun Jan 29, 2006 2:17 am

fsmtnbiker wrote:
slick1851 wrote:Your tranny will thank you later for that im sure.


Actually, our cars aren't DSMs and don't typically have any trouble with broken drivetrain parts... Regardless of abuse or power.


mustn't be thrashing your's hard enough :D
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1989 ST185 - 13.1 @ 165kmh - FMIC, I/E, MHG, 16psi on t04e comp. ct26, RC front, + weight reductions - stock ECU and fuel systems
1989 AW11 - 3sgte powered, CT20B, RC W/A IC, 3" DP and exhaust, LSD
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Postby fsmtnbiker » Sun Jan 29, 2006 7:27 am

It just doesn't have enough power or clutch to hurt itself... Yet. :)
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Postby slick1851 » Mon Feb 06, 2006 6:10 am

fsmtnbiker wrote:It just doesn't have enough power or clutch to hurt itself... Yet. :)





Yeah honeslty even Skylines drivetrain will break, I mean you guys are dumping? I bet your bogging also when you dump, dont let that confuse you with getting to much traction. Your shocking the drivetrain by doing that and then your bogging down and getting out of your power band and you pick back up.

AWD is AWD I dont care what car you in, EVOs,STIs, etc even WRXs use the slip clutch method. Just because somthing isnt broke you either arent making enough power or it just hasnt broken yet.
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Postby SuperWhite92 » Mon Feb 06, 2006 6:30 am

slick1851 wrote: I mean you guys are dumping? I bet your bogging also when you dump, dont let that confuse you with getting to much traction. Your shocking the drivetrain by doing that and then your bogging down and getting out of your power band and you pick back up.


I can't slip anymore (I used to) due to my choice of aftermarket clutch. Let me tell you though. In my near-stock outfit, I actually bounce the car off the limiter with wheelspin, and by the time I get traction I'm well into the powerband. It's not my first choice of launching, but in my stockish outfit, it was good for a 1.83 at NA2005. Slipping would have netted slightly better, but a 1.8 is nothing to sneeze at for a near-stock alltrac.
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Postby theUNYTEDone » Sun Feb 12, 2006 9:23 am

ahhhh im VERY scared to try and launch now...i know i'll need to eventually...but won't it totally kill your clutch? and i know clutch jobs for our cars arent exactly easy....OR cheap...
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Postby RafaCalde » Wed Feb 15, 2006 3:47 pm

i found slipping is the best method. it doesn't shock the tranny(badly if at all) and you are less likely to break something. a buddy of mine has a Spec stage3 and just dumps it. he's broken three axles that. i my slef am going to invest in a stage 2 right now, my clutch started slipping a few months ago so i'm gonna change it out during spring break. i figure that and higher boost i should run good time. i'm not the best driver yet so in time i'm hoping to do 13's in the 1/4. it's possible i've already talked to guys that have done the same setup, so i'll see what i can do.
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