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historical reason/current reason (archive)

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Posted by Jon97 on February 02, 2001 at 14:11:47:

In Reply to: Re: Heel-toe is a road racing technique........ posted by Umnitza M3/4 on February 02, 2001 at 13:50:04:

In early cars, you always had to double clutch -- because trannies didn't have the synchro gears that today make downshifting so smooth. You had to go into nuetral, blip the accelerator to increase revs, and then leave nuetral to downshift. In fact, this technique still works for today's cars that have failing synchros.

Today, you only need to heal/toe/double-clutch in traditional manual cars in certain track conditions: Heal-toe fosters maximum traction and no loss of speed during downshifts. Obviously, F1 cars and the like don't need this technique because of their sequential manual shifting. The blip is integrated into the technology.

Well, I think I've explained everything right but I'm sure someone can add more and explain the nuances better.

sorry for my ignorance but...
why, historically, did double clutching need to be done? And how did it work?

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