double-clutching?
04-17-02, 08:31 PM
#26
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Steve McQueen does some awesome double clutching in the chase scene from the movie "Bullit" (I think)... if that's not double clutching then somebody please tell me what he IS doing there because it's so consistent.
04-17-02, 08:41 PM
#27
Old [Sch|F]ool
YES.... the scenes where we're behind his Mustang through the mountain roads... That was SWEET. Yes that's double-clutching... and IIRC he did all of his own driving too 
04-18-02, 08:21 AM
#30
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Double clutching is USELESS in drag racing. Think about it. If your taking a .25 of a second longer to shift, your going to be a full second slower if you finish the 1/4 in 4th gear. Too much F&F BS going around.
04-18-02, 08:23 AM
#31
it takes a bit of practice. make sure you are learning at low speeds and with plenty of error room. it will take a bit as to do it right you have to do it very fast. practice, practice, practice. and you will know when you get it right because its smooth, like a good heel-toe.
04-18-02, 08:25 AM
#32
Originally posted by Josepi
Double clutching is USELESS in drag racing. Think about it. If your taking a .25 of a second longer to shift, your going to be a full second slower if you finish the 1/4 in 4th gear. Too much F&F BS going around.
Double clutching is USELESS in drag racing. Think about it. If your taking a .25 of a second longer to shift, your going to be a full second slower if you finish the 1/4 in 4th gear. Too much F&F BS going around.
04-18-02, 04:16 PM
#33
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Originally posted by jeremy
it takes a bit of practice. make sure you are learning at low speeds and with plenty of error room. it will take a bit as to do it right you have to do it very fast. practice, practice, practice. and you will know when you get it right because its smooth, like a good heel-toe.
it takes a bit of practice. make sure you are learning at low speeds and with plenty of error room. it will take a bit as to do it right you have to do it very fast. practice, practice, practice. and you will know when you get it right because its smooth, like a good heel-toe.
With a bit of practice it can be done very fast.
04-18-02, 05:11 PM
#35
Old [Sch|F]ool
Nothing to do with the clutch. Read all the goodies above (especially the link I provided). Double-clutching is necessary on cars without syncromesh.
Heel-toe, essentially, is braking and blipping the throttle at the same time, whether it's for a single-clutch or double-clutch downshift.
Heel-toe, essentially, is braking and blipping the throttle at the same time, whether it's for a single-clutch or double-clutch downshift.
04-18-02, 07:57 PM
#37
Old [Sch|F]ool
It's more like the ball of your foot is on the brake pedal, and you push on the gas pedal with the side of your foot by rolling your ankle or something similar.
It's called heel and toe because cars used to have the pedals arranged so you actually used the heel and toe. IIRC Ferrari experimented with arranging the pedals clutch - throttle - brake instead of clutch - brake - throttle.
It's called heel and toe because cars used to have the pedals arranged so you actually used the heel and toe. IIRC Ferrari experimented with arranging the pedals clutch - throttle - brake instead of clutch - brake - throttle.
04-19-02, 05:40 PM
#40
Old [Sch|F]ool
You can do that if you have a synchromesh tranny and the syncros aren't stuffed.
If you don't have synchros (either by design or by wear) then you have to blip the throttle with the clutch out and trans in Neutral. (AKA double clutching)
If you don't have synchros (either by design or by wear) then you have to blip the throttle with the clutch out and trans in Neutral. (AKA double clutching)
04-19-02, 05:45 PM
#41
Banned. I got OWNED!!!
Yeah but... Holding the clutch in disconnects the engine from the wheels pretty much, right? So wouldn't it essentially be the same thing?
I'm not understanding what putting it in Nuetral achieves.
Whenever I downshift, I just hold the clutch in, take the turn, and then let off it and hit the gas. Usually from 3rd to 2nd, and if I'm going too fast in third and I put it in second I hear this whirring high-pitched kinda noise until I slow down enough, is that my synchros?
I'm not understanding what putting it in Nuetral achieves.
Whenever I downshift, I just hold the clutch in, take the turn, and then let off it and hit the gas. Usually from 3rd to 2nd, and if I'm going too fast in third and I put it in second I hear this whirring high-pitched kinda noise until I slow down enough, is that my synchros?
04-19-02, 05:51 PM
#42
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Originally posted by Wattz
Do you GOTTA put it in N?
Couldn't you just hold down the clutch, shift and blip the throttle at the same time, and then let off the clutch?
Do you GOTTA put it in N?
Couldn't you just hold down the clutch, shift and blip the throttle at the same time, and then let off the clutch?
The concept behind double-clutching is to get the engine and trans input-shaft spinning at the same speed. That's why you have to put it in neutral, let the clutch out and blip the throttle. You do this to enable down-shifts on tranny's with worn synchros or simply to reduce wear on your existing gear-box.
What you described is simply heal-toe braking which is done so as not to unsettle a car's balance and prevent compression lock-up when down-shifting and braking hard for a corner.
Heal-toe braking and double-clutching can also be combined.
Last edited by REVHED; 04-19-02 at 06:34 PM.
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