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Launching a twin disk

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Old Jan 29, 2008 | 12:39 PM
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Launching a twin disk

how would i go about launching a twin disk? i recently passed break in period and soon will be taking it to the track and autocross.

when i had my stock clutch, i basically popped the clutch but i have no idea what to do with the twin disk.

searched but couldn't find much information.
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Old Jan 29, 2008 | 12:43 PM
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From: lindenwold NJ
This Is What I Do
Get To The Line Just B4 The Second Staging Light Pops On I Rev The Car Up & Let The Clutch Out Till The Car Starts To Creep Forward Then Slighty Press The Pedal Down So The Car Does Not Creep Anymore Hit The 2 Step When The Other Car Is Staged When The Light Goes Green Slowly Let The Clutch Out For A Good Launch This Part Takes Some Practice & Some Getting Used To
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Old Jan 29, 2008 | 12:49 PM
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i have never poped a clutch when launching an awd car. Might just be me. Any way i like to use my e-brake when launching!
1. pull up on the e-brake
2. push clutch in, put car in 1st gear.
3. push gas all they way down for my 2 step ( set up for 6800 rpm launches)
4. ease out clutch till i feel a slight grab ( car loads up and u feel jerk foward a lil bit
5. once the light is green, i ease out the clutch while letting the e-brake drop quickly and start banging gears.
I have used this method for a while now and pull consistent 1.6-1.7 60' with crappy cooper all season tires. this years i will invest in some drag radials.
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Old Jan 29, 2008 | 01:37 PM
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are u guys on twin disks though?
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Old Jan 29, 2008 | 01:40 PM
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Yes Sir Its In My Sig
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Old Jan 29, 2008 | 01:41 PM
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Damn dude you already broke in the clutch?
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Old Jan 29, 2008 | 01:44 PM
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load the clutch, floor it, slip it at a steady pace so you dotn bog or spin....


start at 5500 then work your way higher until your spinning to much..

You want to have a little tire spin, if youre just hooking hard sure youll have a slightly better launch but its more strain on ur drivetrain.. especially when youre first learning


NEVER, EVER, EVER DROP THE CLUTCH... THE CLUTCH WILL NOT SLIP LIKE THE STOCKER, ITS GOING TO GRAB AND BREAK YOUR TC, AXLES, TRANNY, REAR DIFF.
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Old Jan 29, 2008 | 03:03 PM
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Found that out the hard way! Buschur Stage 1 tranny and Exedy Twin disc, Let it out a little to fast and Awful noises started! Ground all the teeth off the 03 diff! Now I have a Shep Stage 2 TC, so next is Rear end or axles! Learn to let off it fairly slow!
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Old Jan 30, 2008 | 08:38 AM
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yes i have a twin disk (exedy), thats why i posted on this thread!
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Old Jan 30, 2008 | 03:23 PM
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Originally Posted by evocanival
i have never poped a clutch when launching an awd car. Might just be me. Any way i like to use my e-brake when launching!
1. pull up on the e-brake
2. push clutch in, put car in 1st gear.
3. push gas all they way down for my 2 step ( set up for 6800 rpm launches)
4. ease out clutch till i feel a slight grab ( car loads up and u feel jerk foward a lil bit
5. once the light is green, i ease out the clutch while letting the e-brake drop quickly and start banging gears.
I have used this method for a while now and pull consistent 1.6-1.7 60' with crappy cooper all season tires. this years i will invest in some drag radials.
the Crappy tires are all the rave here in San Diego.. the only way to get any grip off the line in my opinion
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Old Jan 30, 2008 | 03:25 PM
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make sure you adjust your engagement point on your clutch... You'll never get a good launch without that being right.. My old exedy twin seemed to launch itself. so no suggestions on that.
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Old Feb 2, 2008 | 12:47 AM
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Originally Posted by big block ix
make sure you adjust your engagement point on your clutch... You'll never get a good launch without that being right.. My old exedy twin seemed to launch itself. so no suggestions on that.
how is your engagemnet point?

mine seems to be kind of high like it was when it was stock
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Old Feb 2, 2008 | 12:59 AM
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From: Florida
I haven't install my twin hd yet..but what you said is I always do in my stock clutch. Ive been doing 1.6's on this way.( 24 psi on all 4 tires)


Originally Posted by 4WS@TopLevelAuto
load the clutch, floor it, slip it at a steady pace so you dotn bog or spin....


start at 5500 then work your way higher until your spinning to much..

You want to have a little tire spin, if youre just hooking hard sure youll have a slightly better launch but its more strain on ur drivetrain.. especially when youre first learning


NEVER, EVER, EVER DROP THE CLUTCH... THE CLUTCH WILL NOT SLIP LIKE THE STOCKER, ITS GOING TO GRAB AND BREAK YOUR TC, AXLES, TRANNY, REAR DIFF.
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Old Feb 2, 2008 | 01:24 AM
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From: Ft. Lauderdale, Fl
Originally Posted by evovin
I haven't install my twin hd yet..but what you said is I always do in my stock clutch. Ive been doing 1.6's on this way.( 24 psi on all 4 tires)

Way to go Champ! Making us look good!


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Old Feb 2, 2008 | 04:40 AM
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hold 6500rpm at stage....
hold the clutch and release fast when launching...
DO not pop the clutch though..

just release fast and get on the gas.

I totally ****ed up my last car...high a$$ rpm launches etc..
never had a gearbox or t-case problem..

and that was only cause I slipped the clutch when launching.
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