Am I shifting/using the clutch too often?

DeDCrispix · 10-15-2015, 12:20 PM

Pretend you're on the freeway...doing 65-70. Now you're in 6th (manual of coures) and you want to give her the beans, so you drop down to 4th. Now when I do this, I clutch in, go to neutral, clutch out, rev, clutch in, 4th gear, clutch out. Doesn't take me more than .5 seconds but this is so unnecessary right?

(I came from a beater with a manual that shifted more smoothly shifting like this). Carried this "bad habit" when going to a 98 Mustang GT...and still do it in my Z.

Pulled this from wiki 'double clutching'.

"The purpose of the double-clutch technique is to aid in matching the rotational speed of the input shaft being driven by the engine to the rotational speed of the gear the driver wishes to select (directly connected to rotating wheels). When the speeds are matched, the gear will engage smoothly and no clutch is required. If the speeds are not matched, the dog teeth on the collar will "clash" or grate as they attempt to fit into the holes on the desired gear. A modern synchromesh gearbox accomplishes this synchronization more efficiently. However, when the engine speed is significantly different from the transmission speed, the desired gear can often not be engaged even in a fully synchronized gearbox. An example is trying to shift into a gear while travelling outside the gear's speed or directional range, such as accidentally into 1st from near the top of 2nd, or intentionally from reverse to a forward gear whilst still moving at speed.

Double clutching, although time consuming, eases gear selection when an extended delay or variance exists between engine and transmission speeds."

So...in theory...good. In practice, waste of time?

dP3NGU1N · 10-15-2015, 12:29 PM

You don't need to double clutch in a car with modern syncros unless you're Vin Diesel. Carry on granny shifting.

DeDCrispix · 10-15-2015, 12:39 PM

Quote:

Originally Posted by dP3NGU1N

You don't need to double clutch in a car with modern syncros unless you're Vin Diesel. Carry on granny shifting.

Yeah, I was wondering why the hell I'm still doing it in car with syncros...

Unless I was a big-rig trucker in a past life...

kenchan · 10-15-2015, 01:10 PM

i double clutch sometimes when i cant get the car to go into 1st at anything faster than a roll.

but im in pain lately so i try not to clutch too much..

mishuko · 10-15-2015, 01:45 PM

do you have the base model or sport package?

Nixin · 10-15-2015, 02:48 PM

I am also guilty of double clutching, sometimes. It just feels correct.

Firebase99 · 10-15-2015, 02:52 PM

You should try it reverse. I made that mistake once. Once!!

DeDCrispix · 10-15-2015, 02:58 PM

Quote:

Originally Posted by mishuko

do you have the base model or sport package?

Base. My left foot is the S-MODE button.

SouthArk370Z · 10-15-2015, 03:27 PM

As per the article that was quoted, double-clutching isn't necessary unless there is a big difference in input and gear speeds - such as kenchan's example of downshifting to first at any appreciable speed - or worn synchros.

kenchan · 10-15-2015, 04:07 PM

Quote:

Originally Posted by DeDCrispix

Base. My left foot is the S-MODE button.

should be ur right foot...

DeDCrispix · 10-15-2015, 04:13 PM

Quote:

Originally Posted by kenchan

should be ur right foot...

Lol...both?

kenchan · 10-15-2015, 04:26 PM

Quote:

Originally Posted by DeDCrispix

Lol...both?

no, s-mode is throttle control to rev match. has nothing to do with how you suck or dont suck with the clutch (left foot) action.

Zthirty4NISMO · 10-15-2015, 07:07 PM

Yeah, not necessary with today's synchos. Now stepping down through the gears on an Eaton Fuller Super 10 tranny is a completely different story and will have you wishing for SRM

Sent from my HTC6500LVW using Tapatalk

DeDCrispix · 10-15-2015, 07:23 PM

Quote:

Originally Posted by kenchan

no, s-mode is throttle control to rev match. has nothing to do with how you suck or dont suck with the clutch (left foot) action.

ramoszx12r · 10-15-2015, 08:03 PM

LOL, Are we talking about a tractor trailer.

10-15-2015, 12:20 PM	#1 (permalink)
DeDCrispix Base Member Join Date: Sep 2015 Location: Las Vegas, NV Posts: 12 Drives: 12 370Z coupe 6MT Rep Power: 9	Am I shifting/using the clutch too often? Pretend you're on the freeway...doing 65-70. Now you're in 6th (manual of coures) and you want to give her the beans, so you drop down to 4th. Now when I do this, I clutch in, go to neutral, clutch out, rev, clutch in, 4th gear, clutch out. Doesn't take me more than .5 seconds but this is so unnecessary right? (I came from a beater with a manual that shifted more smoothly shifting like this). Carried this "bad habit" when going to a 98 Mustang GT...and still do it in my Z. Pulled this from wiki 'double clutching'. "The purpose of the double-clutch technique is to aid in matching the rotational speed of the input shaft being driven by the engine to the rotational speed of the gear the driver wishes to select (directly connected to rotating wheels). When the speeds are matched, the gear will engage smoothly and no clutch is required. If the speeds are not matched, the dog teeth on the collar will "clash" or grate as they attempt to fit into the holes on the desired gear. A modern synchromesh gearbox accomplishes this synchronization more efficiently. However, when the engine speed is significantly different from the transmission speed, the desired gear can often not be engaged even in a fully synchronized gearbox. An example is trying to shift into a gear while travelling outside the gear's speed or directional range, such as accidentally into 1st from near the top of 2nd, or intentionally from reverse to a forward gear whilst still moving at speed. Double clutching, although time consuming, eases gear selection when an extended delay or variance exists between engine and transmission speeds." So...in theory...good. In practice, waste of time?

10-15-2015, 12:29 PM	#2 (permalink)
dP3NGU1N A True Z Fanatic Join Date: Feb 2011 Location: Irvine Posts: 1,682 Drives: 13 PW sport 6mt Rep Power: 18	You don't need to double clutch in a car with modern syncros unless you're Vin Diesel. Carry on granny shifting. TerribleONE, 2011 Nismo#91, JARblue and 10 others like this. __________________ 35% Hooper Optik \| Takeda Attack CAI \| F.I. HFC \| Hotchkis Sway Bar \| Stillen 24row \| OS Giken Super Lock LSD \| TK Shift Knob \| EVO-R Carbon Diffuser

10-15-2015, 02:52 PM	#7 (permalink)
Firebase99 A True Z Fanatic Join Date: Sep 2013 Location: fl Posts: 1,372 Drives: 14 3.8 Gen Coupe GT Rep Power: 14033	You should try it reverse. I made that mistake once. Once!! __________________ '14 3.8 Genesis Coupe, '13 Volvo S60, '04 Honda Accord, '13 370Z-sold, '05 350Z Touring-sold, '92 300Z Twin Turbo-sold, '82 280ZX-gone, '79 260Z-gone

10-15-2015, 03:27 PM	#9 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	As per the article that was quoted, double-clutching isn't necessary unless there is a big difference in input and gear speeds - such as kenchan's example of downshifting to first at any appreciable speed - or worn synchros. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

10-15-2015, 07:07 PM	#13 (permalink)
Zthirty4NISMO Base Member Join Date: Oct 2014 Location: South Dakota Posts: 214 Drives: DRKNITE Rep Power: 10	Yeah, not necessary with today's synchos. Now stepping down through the gears on an Eaton Fuller Super 10 tranny is a completely different story and will have you wishing for SRM Sent from my HTC6500LVW using Tapatalk __________________ 2014 370Z NISMO #0543 - Magnetic Black on Black on Black Always Dry \|\| AROSPEED \|\| Covercraft \|\| CoverKing \|\| EVO-R \|\| Fast Intentions \|\| FilterMag \|\| NISMO \|\| ONEighty \|\| Prismatic Powders \|\| RJM Performance \|\| The370Z.com \|\| Trackspec \|\| ZSPEC Design \|\| ZSPEED Performance \|\| Z1 Motorsports \|\| Panaflex Carbon Ceramic Tint

10-15-2015, 01:10 PM	#4 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141520	i double clutch sometimes when i cant get the car to go into 1st at anything faster than a roll. but im in pain lately so i try not to clutch too much..

10-15-2015, 01:45 PM	#5 (permalink)
mishuko A True Z Fanatic Join Date: Jul 2014 Location: bouncin on tigga Posts: 8,062 Drives: '12 Z Rep Power: 9434	do you have the base model or sport package?

10-15-2015, 02:48 PM	#6 (permalink)
Nixin A True Z Fanatic Join Date: Sep 2015 Location: GWN Posts: 3,488 Drives: Goodbye Z! Rep Power: 19832	I am also guilty of double clutching, sometimes. It just feels correct.

10-15-2015, 08:03 PM	#15 (permalink)
ramoszx12r Track Member Join Date: Sep 2015 Location: Carneys point NJ Posts: 665 Drives: 16 370Z Nismo White. Rep Power: 1427	LOL, Are we talking about a tractor trailer. __________________ Tony Ramos

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