Double De-Clutch
04-27-2005, 02:22 AM
#21
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Originally Posted by Nick Graves,Apr 27 2005, 10:44 AM
That comment about H&T the IAM is probably true in an idealised, happy world of 1950s motoring
H&T allows you to rev match whilst braking, and of course that is your choice to do this.
Most IAM observers can drive very quickly and still use the IAM system, you would just find that they do it in a different way to you and rely less on outright acceleration and speed to do this but just keeping a higher average speed.
IAM just propose that over lapping braking and gear change is not needed for day to day driving. I manage to drive every day and make progress and drive quickly (but legally and safely) without H&T. If I use H&T then I am pushing that bit harder, but this is rare. But then that is my choice.
04-27-2005, 02:37 AM
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It's all about observation and planning so making your driving smoother. Oh and because you brake less frequently you save on fuel. Thats one reason why they teach it for fleet drivers.
04-27-2005, 02:52 AM
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Originally Posted by Nick Graves,Apr 27 2005, 09:44 AM
San,
Think of a DDC as H&T without using the brake pedal as a pivot. I think the Septics call it rev-matching.
That comment about H&T the IAM is probably true in an idealised, happy world of 1950s motoring, which is why I've always shied away (or overtaken!) the IAM.
Think of a DDC as H&T without using the brake pedal as a pivot. I think the Septics call it rev-matching.
That comment about H&T the IAM is probably true in an idealised, happy world of 1950s motoring, which is why I've always shied away (or overtaken!) the IAM.
But I was just clarifying that double DECLUTCHING and double CLUTCHING were one and the same thing as on the 'howthingswork' site, they refer to double clutching only.
04-27-2005, 12:43 PM
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AFAIK Heel and toe is used when pushing hard on track/road where it is important to keep the balance of the car just before a corner but be in the right gear for the exit.
The idea being that if you do not heel and toe then as the new gear is engaged the weight of the car can move to the front of the car making the back end lighter as in lift off oversteer. If you are on the brakes at this point (as you would be before a corner) then the rear brakes can lock up....not good.
seem to remember Goodwin in Autocar touched on this a few months ago.
Cheers
Rob
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