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Driving Style and Technique Got a favorite way to enter a corner? Discuss all things related to piloting a race car here. |
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04-17-2005, 10:51 AM | #16 | |
AF Enthusiast
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Re: Double-Clutching VS Granny Shifting
Torretoooooo!!!!!!!
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04-17-2005, 09:25 PM | #17 | ||
AF Newbie
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Re: Re: Re: Double-Clutching VS Granny Shifting
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04-19-2005, 11:57 PM | #18 | ||
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Join Date: Apr 2005
Location: Colorado springs, Colorado
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Re: Re: Double-Clutching VS Granny Shifting
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I would find it rather difficult to fit $100,000 under the hood of any one car that doesnt have the words 'V12' in its engine description.. or that isnt meant to last for a 20 or so runs down the strip, even then; sketchy. Have fun with that. |
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04-20-2005, 04:16 PM | #19 | ||
AF Enthusiast
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Re: Re: Re: Double-Clutching VS Granny Shifting
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04-21-2005, 05:10 AM | #20 | ||
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Join Date: Apr 2005
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Re: Re: Double-Clutching VS Granny Shifting
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The purpose of double-clutching is to match the engine revs to the driveline speed in a downshift. The process is: engage clutch - shift into neutral - disengage clutch - blip the throttle - engage clutch - engage lower gear - disengage clutch. When you get proficient at the process it can be done is a split second and will result in very smooth downshifts. This is important for several reasons in aggressive/race driving: first is transmission longevity; it removes a lot of unnecessary wear from the synchros. Additionally, by not forcing the engine to rev up when the clutch is re-engaged after a downshift (without double-clutching), it helps the driver maintain better control over the deceleration. While racing, most drivers use a downshifting technique called heal-toe by where you blip the throttle when downshifting when the clutch is engaged, then let the clutch back out. The idea is to make a smooth downshift to maintain control and minimize driveline wear. The advantage of double-clutching over simply heal-toe downshifting is in the internal working of the transmission. Basically all modern automobile transmissions are of the constant-mesh design, which means all the mainshaft gears are constantly meshed with the cluster gear, thus, when the input shaft is turning, so are all the mainshaft gears. By double clutching, you're engaging the transmission in neutral, then hitting the throttle causing the transmission to come up to engine speed. In heal-toe shifting, the engine and transmission are disengaged from each other so only the engine rpms speed up. The only time I really use this over heal-toe is when I am decelerating very hard, say coming up to a sharp corner where I will skip a gear in downshifting. It helps to safely match revs and better maintain control. Hope this helps clear things up. |
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04-24-2005, 12:26 AM | #21 | |
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Re: Double-Clutching VS Granny Shifting
how come this thread is not closed yet?
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"i told you it was third, I lengthen the injector pulse another millisec and tuned the NOS timer, and you'll run nines" --2OF9-- (DSM team specialist) ;D #808/1000 |
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04-25-2005, 10:23 AM | #22 | |
AF Enthusiast
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Re: Double-Clutching VS Granny Shifting
You know we have a thread stickied in the eclipse forum just to keep this from happening. NO double clutching. rev matching is diffrent, and it has nothing to do with WEARING out your transmission its to save your clutch a little wear and tear and keep the balance of the car.just close the thread and cut and paste the post at the top of the eclipse forum. lol save the world some trouble, and all you retards that have no idea when ppl are being sarcastic about the FnF movie. figure it out.
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240sx, soon to be S13.5, future mods are wheels and hopefully paint and the rest of my conversion. (96 eclipse RS 5-speed, magnaflow exhaust,chrome headers,cold air intake,denso iridium sparkplugs,new kumho tires )******EDIT totalled car now******* |
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04-29-2005, 11:37 PM | #23 | |
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Re: Double-Clutching VS Granny Shifting
hahahahaha...its just funny to see how much people really believe FnF. "you blew the welds on the intake?!!!!" hahahah...this should be closed..now!
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"i told you it was third, I lengthen the injector pulse another millisec and tuned the NOS timer, and you'll run nines" --2OF9-- (DSM team specialist) ;D #808/1000 |
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05-03-2005, 03:46 PM | #24 | ||
AF Regular
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Re: Re: Re: Double-Clutching VS Granny Shifting
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GRANNY SHIFTIN NOT DOUBLE CLUTCHIN LIKE YOUR SUPPOSED TO! Now me and the mad scientist gotta rip the block apart and replace those piston rings ya fried (Burnnnnned)
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Once PearlGT, now RaidenKing. Sr20det - Greddy V-SPL front mount intercooler, MR DP, Walbro 255 Fuel pump, Type RFL BOV, Koyo Radiator, MR straight pipe/muffler. Greddy Profec II, D2 Coilovers. In the garage - MR Headers, outlet, z32 maf, z32 brakes, home made tails. Near Future - 5 lug conversion w/ z32 brakes installed and decent lsd. |
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05-09-2005, 11:41 PM | #25 | ||
AF Enthusiast
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Re: Double-Clutching VS Granny Shifting
I actually blew the weld on my intake yesterday by racing vin diesil "DUDE I ALMOST HAD HIM!!!!" But I do have one quarrel with the movie "It doesnt matter if you win by an inch or a mile" If you win by a mile in a 1/4 race, was your opponent going in reverse????
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Http://www.cardomain.com/id/89whitesi Quote:
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05-14-2005, 01:10 AM | #26 | |
AF Enthusiast
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Re: Double-Clutching VS Granny Shifting
not only was he going in reverse, he was doing it 3 times faster than you, so really, he has the faster car.
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Dr. Disque - Current cars: 2008 BMW 135i M-Sport 2011 Mazda2 Touring Past cars: 2007 Mazda 6S 5-door MT 1999 Ford Taurus SE Duratec |
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05-14-2005, 01:14 AM | #27 | |||
AF Enthusiast
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Re: Re: Double-Clutching VS Granny Shifting
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Well he had a green eclipse with a cool air intake, 2 of the big NOS bottles and a stand alone fuel management system, wasnt a bad way to spend $10,000 if u ask me
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