Double clutching & other ways to shift

mustangLX92 · 07-31-2001, 08:27 AM

Should I learn how to double clutch? Will my car benifit from it? What other methods of shifting should I learn?

joey50gt · 07-31-2001, 11:02 AM

What is double clutching? I have never herd of that.
Have you ever tried power shifting?

jimberg · 07-31-2001, 11:50 AM

Double clutching is something you would do in a road race, not drag racing (except on The Fast and the Furious).

Double clutching is good if you have bad synchros or something.

------------------
351W 89 Mustang GT Convertible

07-31-2001, 01:22 PM

It's just a way in road racing to make sure your RPM's stay up high.

------------------
'90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach drag-launch spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; Cervini's 3" turbo hood; A/C-less; cat-less; 2 chamber Flos; Corbeau racing seats; FMS 30# injectors; JMS chip; Holley 190lb fp; TFS track heat Intake (12.299 @ 113 - 1.78 60')

exgmguy · 07-31-2001, 02:22 PM

"You're not even double clutching!!!!!!"----Vin Diesel.

Sooooo gay.

1BAD89 · 07-31-2001, 03:21 PM

My thoughts exactly.

Frank VandenBerg · 07-31-2001, 08:09 PM

I double clutch my Freightliner simply because it's not synchronized. Double cluching your car isn't really needed.

RAGE_5.0 · 07-31-2001, 08:14 PM

another person from ruthven! i'm from leamington...........i thought u didn't have to use the clutch in a truck

JAMES

------------------
Black 1990 gt cobra bonestock
not for long

QuantumMotorsports · 07-31-2001, 09:36 PM

Double clutching is when you press the clutch once to bring the tranny out of gear. And then release the clutch with the tranny in neutral and rev the engine to bring the tranny main shaft up to a speed that is "synchronized" with the output shaft of the tranny(which depends on what gear you are shifting into and how fast the vehicle is going) You then press the clutch pedal again and put the tranny in the next highest gear. There is absolutely no reason to do this unless your tranny grinds gears with the clutch in. That is what a synchronizer is for. It slows the main shaft of the tranny using friction to the same speed as the next gear when upshifting (because your engine RPMs will drop after entering the next gear) And speeds up the main shaft when downshifting. You can hear this on most older T5s with worn synchros when downshifting say at about 35 or so into second gear. You will hear a whinning noise that changes pitch as pressure is applied to the shift lever to engage the tranny into a lower gear. Anyway, that's probably way more discussion than you guys wanted, but hope that helps.

------------------
Michael Black
Quantum Motorsports
Norman, Oklahoma

1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" offroad H pipe w/ 2 chamber flowmasters, T5 tranny
New E/T!!!
14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

Super_Stang · 07-31-2001, 11:22 PM

ahh the ol double clutch! Well i have to use it now cause my synchros are out. But in my 67 mustang i "speed shift". My dad said in the 60's and 50's if you speed shift you could shift faster than an automatic tranny. but that doesn't work today. I still speed shift when i street race. WARNING! this can be very bad for ur car unless ur good, but to get good u gotta practice! here is how ya do it - when ur racing and ur going to shift from gear to gear ( u gotta be fast *** though ) keep the pedal to the metal (floored) and push in the clutch just enough to shift and then pop it out. But if ur not quick enough you will float the valves or maybe even throw a rod or something. if ur good then it is just has good as an automatic. at 16 i have been known as the fastest shift in the south!

------------------
1967 mustang gt with a 390 bored and stroked, dual quads, 12.5 :1 compression, 3.50 9" posi gears, comp cam, edlebrock heads, 4 speed toploader, coupe and dark moss green!
1989 Mustang GT Hatch just purchased for 1600 and needs mods! 156K on the engine but it was well taken care of.

[This message has been edited by Super_Stang (edited 08-01-2001).]

07-31-2001, 08:27 AM	#1
mustangLX92 Registered Member Join Date: May 2001 Location: Maryland Posts: 138	Double clutching & other ways to shift Should I learn how to double clutch? Will my car benifit from it? What other methods of shifting should I learn?

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07-31-2001, 11:02 AM	#2
joey50gt Registered Member Join Date: Jan 2001 Location: hurst,texas,america Posts: 95	What is double clutching? I have never herd of that. Have you ever tried power shifting?

07-31-2001, 11:50 AM	#3
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	Double clutching is something you would do in a road race, not drag racing (except on The Fast and the Furious). Double clutching is good if you have bad synchros or something. ------------------ 351W 89 Mustang GT Convertible

07-31-2001, 01:22 PM	#4
bada$$lx Guest Posts: n/a	It's just a way in road racing to make sure your RPM's stay up high. ------------------ '90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach drag-launch spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; Cervini's 3" turbo hood; A/C-less; cat-less; 2 chamber Flos; Corbeau racing seats; FMS 30# injectors; JMS chip; Holley 190lb fp; TFS track heat Intake (12.299 @ 113 - 1.78 60')

07-31-2001, 02:22 PM	#5
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	"You're not even double clutching!!!!!!"----Vin Diesel. Sooooo gay.

07-31-2001, 03:21 PM	#6
1BAD89 Tubbed and Juiced Join Date: Mar 2001 Location: Tulsa, Oklahoma Posts: 1,861	My thoughts exactly.

07-31-2001, 08:09 PM	#7
Frank VandenBerg Registered Member Join Date: Oct 1998 Location: Ruthven, On. Canada Posts: 32	I double clutch my Freightliner simply because it's not synchronized. Double cluching your car isn't really needed.

07-31-2001, 08:14 PM	#8
RAGE_5.0 Registered Member Join Date: Jul 2001 Location: Leamington, Ontario, Canada Posts: 767	another person from ruthven! i'm from leamington...........i thought u didn't have to use the clutch in a truck JAMES ------------------ Black 1990 gt cobra bonestock not for long

07-31-2001, 09:36 PM	#9
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	Double clutching is when you press the clutch once to bring the tranny out of gear. And then release the clutch with the tranny in neutral and rev the engine to bring the tranny main shaft up to a speed that is "synchronized" with the output shaft of the tranny(which depends on what gear you are shifting into and how fast the vehicle is going) You then press the clutch pedal again and put the tranny in the next highest gear. There is absolutely no reason to do this unless your tranny grinds gears with the clutch in. That is what a synchronizer is for. It slows the main shaft of the tranny using friction to the same speed as the next gear when upshifting (because your engine RPMs will drop after entering the next gear) And speeds up the main shaft when downshifting. You can hear this on most older T5s with worn synchros when downshifting say at about 35 or so into second gear. You will hear a whinning noise that changes pitch as pressure is applied to the shift lever to engage the tranny into a lower gear. Anyway, that's probably way more discussion than you guys wanted, but hope that helps. ------------------ Michael Black Quantum Motorsports Norman, Oklahoma 1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" offroad H pipe w/ 2 chamber flowmasters, T5 tranny New E/T!!! 14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

07-31-2001, 11:22 PM	#10
Super_Stang Registered Member Join Date: Jul 2001 Location: Refugio Posts: 67	ahh the ol double clutch! Well i have to use it now cause my synchros are out. But in my 67 mustang i "speed shift". My dad said in the 60's and 50's if you speed shift you could shift faster than an automatic tranny. but that doesn't work today. I still speed shift when i street race. WARNING! this can be very bad for ur car unless ur good, but to get good u gotta practice! here is how ya do it - when ur racing and ur going to shift from gear to gear ( u gotta be fast *** though ) keep the pedal to the metal (floored) and push in the clutch just enough to shift and then pop it out. But if ur not quick enough you will float the valves or maybe even throw a rod or something. if ur good then it is just has good as an automatic. at 16 i have been known as the fastest shift in the south! ------------------ 1967 mustang gt with a 390 bored and stroked, dual quads, 12.5 :1 compression, 3.50 9" posi gears, comp cam, edlebrock heads, 4 speed toploader, coupe and dark moss green! 1989 Mustang GT Hatch just purchased for 1600 and needs mods! 156K on the engine but it was well taken care of. [This message has been edited by Super_Stang (edited 08-01-2001).]