AutoX launch technique on v710s
07-12-2006 | 05:52 AM
#11
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Joined: Aug 2002
Posts: 1,602
Likes: 3
From: St. Louis
I had brand new A3S05's on for last weekends autocross (never run race compounds before). It had a drag start...that was slightly uphill. First run, I bumped at about 7k, no problems, good launch. The other 5 runs, once the tires had warmed, I had so much traction that I would still bog down dumping at 9k 
I don't suppose there is anything I can do about that, huh (besides not attending autocrosses with sloped starts 
) ?
I don't suppose there is anything I can do about that, huh (besides not attending autocrosses with sloped starts ) ?
07-12-2006 | 06:23 AM
#12
Joined: Nov 2003
Posts: 2,246
Likes: 1
From: Atlanta
Formula Redline, I would respectfully suggest that you too are not letting the clutch out fast enough. With my experience I find it impossible to believe that you couldn't break the traction with a clutch dump at 9k.
Did you use your hand brake to hold you on the hill or were you using the brake pedal? If you were using the pedal, it's concievable to me that you weren't able to get on the gas quickly enough to bring up the revs and dump the clutch before you started rolling backwards down the hill. Even a slight backwards roll is going to give your clutch fits when you dump it. That's just too force for the stock clutch to overcome.
Now if you were using your hand brake to hold the hill and you dumped the clutch and had the revs up I'm sure you could create wheelspin.
Did you use your hand brake to hold you on the hill or were you using the brake pedal? If you were using the pedal, it's concievable to me that you weren't able to get on the gas quickly enough to bring up the revs and dump the clutch before you started rolling backwards down the hill. Even a slight backwards roll is going to give your clutch fits when you dump it. That's just too force for the stock clutch to overcome.
Now if you were using your hand brake to hold the hill and you dumped the clutch and had the revs up I'm sure you could create wheelspin.
07-12-2006 | 07:04 AM
#13
Joined: Jul 2003
Posts: 13,468
Likes: 33
From: Upstate NY
Originally Posted by glagola1,Jul 12 2006, 10:23 AM
Formula Redline, I would respectfully suggest that you too are not letting the clutch out fast enough. With my experience I find it impossible to believe that you couldn't break the traction with a clutch dump at 9k.
Did you use your hand brake to hold you on the hill or were you using the brake pedal? If you were using the pedal, it's concievable to me that you weren't able to get on the gas quickly enough to bring up the revs and dump the clutch before you started rolling backwards down the hill. Even a slight backwards roll is going to give your clutch fits when you dump it. That's just too force for the stock clutch to overcome.
Now if you were using your hand brake to hold the hill and you dumped the clutch and had the revs up I'm sure you could create wheelspin.
Did you use your hand brake to hold you on the hill or were you using the brake pedal? If you were using the pedal, it's concievable to me that you weren't able to get on the gas quickly enough to bring up the revs and dump the clutch before you started rolling backwards down the hill. Even a slight backwards roll is going to give your clutch fits when you dump it. That's just too force for the stock clutch to overcome.
Now if you were using your hand brake to hold the hill and you dumped the clutch and had the revs up I'm sure you could create wheelspin.
That's how I dealt with a fast uphill start at NEDIVs last year. Handbrake on, clutch in, Bring up the revs, dump the clutch and drop the handbrake together.
07-12-2006 | 09:53 AM
#14
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Joined: Aug 2002
Posts: 730
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From: Honda HQ
try doing the uphill handbrake start at a pro-solo where you're working against a drag tree and the time starts the .001 second the light turns green 
Then do it 11 more times. It's REALLY intense! I miss Pro-Solos...
Then do it 11 more times. It's REALLY intense! I miss Pro-Solos...
07-13-2006 | 11:37 AM
#16
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Joined: Aug 2002
Posts: 1,602
Likes: 3
From: St. Louis
Originally Posted by glagola1,Jul 12 2006, 06:23 AM
Formula Redline, I would respectfully suggest that you too are not letting the clutch out fast enough. With my experience I find it impossible to believe that you couldn't break the traction with a clutch dump at 9k.
Did you use your hand brake to hold you on the hill or were you using the brake pedal? If you were using the pedal, it's concievable to me that you weren't able to get on the gas quickly enough to bring up the revs and dump the clutch before you started rolling backwards down the hill. Even a slight backwards roll is going to give your clutch fits when you dump it. That's just too force for the stock clutch to overcome.
Now if you were using your hand brake to hold the hill and you dumped the clutch and had the revs up I'm sure you could create wheelspin.
Did you use your hand brake to hold you on the hill or were you using the brake pedal? If you were using the pedal, it's concievable to me that you weren't able to get on the gas quickly enough to bring up the revs and dump the clutch before you started rolling backwards down the hill. Even a slight backwards roll is going to give your clutch fits when you dump it. That's just too force for the stock clutch to overcome.
Now if you were using your hand brake to hold the hill and you dumped the clutch and had the revs up I'm sure you could create wheelspin.
I was side stepping the clutch while dropping the handbrake. I actually got comments at the event on how quick I was taking off.But then the rubber would catch and the engine would bog (immediatly drop revs, I could detect no slipping of the clutch). It just must have been to much uphill.
07-13-2006 | 11:47 AM
#18
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Joined: Aug 2002
Posts: 1,602
Likes: 3
From: St. Louis
Originally Posted by glagola1,Jul 13 2006, 11:43 AM
Holy smokes. I believe you but that's insane! You know, come to think of it, when I broke my axle, I was on an up hill start... Maybe there is something to that.
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