Double clutching and heel-toe?

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Originally Posted by lithium

i maintain double clutching is UNNECESSARY in a modern gearbox with functioning synchros.

why anyone still double clutches on a gearbox with synchros is beyond me. i only ever use it to get into first while moving as mentioned above by Aaron. i suppose you also don't use your brakes because you'll wear out the brake pads? ;)

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did you miss the bit where I said it saves your synchros?

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Originally Posted by trism

aaronng edit: Removed swearing

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i did a lol

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Originally Posted by Mr_will

did you miss the bit where I said it saves your synchros?

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i missed the bit where anything in my post was 'Not true'. please tell me what i said that was incorrect.

everyone knows that double clutching saves your synchros. my point is that it is an unnecessary technique on a modern gearbox :)

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Originally Posted by trism

aaronng edit: Removed swearing

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And the 2009 E-hero of the year award goes tooooo...............

trism

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Originally Posted by lithium

i missed the bit where anything in my post was 'Not true'. please tell me what i said that was incorrect.

everyone knows that double clutching saves your synchros. my point is that it is an unnecessary technique on a modern gearbox :)

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it is necessary if you want your synchros to last, I don't know if I can break it down for you any further

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Originally Posted by Mr_will

it is necessary if you want your synchros to last, I don't know if I can break it down for you any further

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i believe a gearbox treated sympathetically and maintained correctly will last upwards of 250000km before it starts to crunch, with no use of double clutching whatsoever.

250000km out of one gearbox is good enough for me. that's ten or twenty years of driving. i guess if you want more you might think it's 'necessary' to double clutch.

look it's not worth trying to argue the semantics of necessary and unnecessary, or what 'wanting to last' means. i agree to disagree with you on this point :)

The benefit of double clutching to save your synchros is quite small compared to looking after it. Your far better off not banging through gears as quick as you can, and shifting in a double movement when driving round normally (with the shifter no the clutch) - Eg. - 1-N, wait half a sec, N-2 which isnt too dissimilar to how you cruise around with a dog box.

Banging through gears is a terrific way to give you a need to change a gearbox or 2, no amount of double clutching or whatever other truck driving technique will ever balance that out.

my understanding is that double clutching was commonplace where driving older vehicles where there was no syncromesh to help the gears engage. Nowadays boxes have synchromesh or synchros that synchronise the gears so as to ensure a smooth transition...

i dont double clutch, but i always rev match... rev matching is probably helping maximise your clutch life more than anything, as well as keeping the gearing down process smooth particularly during spirited driving where you need to keep the car's attitude stable... rather than trying to fight the movement of inertia that comes with gearing down coming into a corner, particularly at high speed and high revs...

what's the difference between double clutching and revmatching? I just revmatch without the double.

Someone also said that you shouldn't exceed 3000rpm with the clutch down (fully) and the gearbox engaged in a gear...

I haven't heard of exceeding 3000rpm being bad, what if for example ur at 3000rpm in 4th and u downshift to 2nd, you would need to revmatch it to around 5000rpm~

oh yeh lol sorry wasn't thinking right... blipping is the idea behind heel-toe .___.

Your both right above. I'm sure you both know that. :thumbsup:

Of course double clutching saves your synchros, your matching speeds on both gears engaging, so your syncros arn't doing any work.

But in turn, thats what synchros designed for. They match speeds of the gears. And I'm sure if your not always smashing through each gear they will last a long long time. No point having synchros if your gonna double clutch all the time.