What the hell is double clutching?

Michael Yount · May 3, 2005

Yup - after a while, you just get a feel for it. You can tell by the sound of the engine and how much time has passed since you pulled it out of gear -- and by the 'feel' of the shifter about when it's ready to 'drop' into the next gear.

Speeds8erM-1 · May 3, 2005

Killer50stang said:
"Granny Shifting, not double Clutching like you should" is the stupidest line in any movie...especially since the car he's talking about is a GS Eclispe...not a semi. Double clutching is...press the clutch in, put it in neutral, let the clutch out, then push the clutch in again to shift it in gear. I guess Vin didn't know that but somehow his car ran 10 secs. Oh and my floor board always flies off when when my piston rings fry. And after my rings are fried I can still drive the car as if nothing ever happened. Dumbest MOVIE ever!!!

If you are going to run nawzzzzzz you better get ARP Floorboard Studs

88 Fox GT · May 3, 2005

Speeds8erM-1 said:
If you are going to run nawzzzzzz you better get ARP Floorboard Studs

"You're lucky you didn't blow the welds on the intake!"

Speeds8erM-1 · May 3, 2005

I had them tigged up nice, I reccomend the same for anybody spraying enough nawzzzz to freak out a computer.

seijirou · May 3, 2005

"Granny shifting, not double-clutching like you should" When I heard this line, in the theater, I couldn't help but to laugh very loud, much to the dismay of those around me.

Double clutching is granny shifting.

Recently double clutching has basically meant the same thing, but also implies that you just keep your foot in the gas the whole time.
Maybe they run crap transmissions, because I can keep my foot in it and just shift normally. Who knows.

Paul Perreca · May 3, 2005

thanks

Michael Yount · May 3, 2005

Speed shifting is keeping your foot on the gas during the shift.

Granny shifting is lifting off the gas during the shift.

Double clutching is entirely different, practically unrelated to the other 2 terms.

executioner · May 3, 2005

mr. yount has it right again. i drove heavy trucks for 10 years. approx 500 rpm split to change gears double clutching on non sychromesh. although most truckers do not use clutch at all to change gears except to start or heavy load on first few gears. Shifting with no clutch can be done on trucks(tranny makers dont like it)and you can do it on your 5.0 but your tranny probably wont last long.
The clutch cable or pressure plate on my Freightliner once broke(something in clutch)pedal stuck on floor. Advised by Freightliner to start in 1st(like a jeep)then shift with no clutch to dealer.made it. only hard part was stopping for red lights or traffic! you may also wonder why truckers use jake brake when shifting gears(the farting sound when upshifting)it's to drop the rpm's quicker to get the next gear.

90 7up vert
03 dakota quad cab sport 4.7 v8 5sp 2wd 3:92 lsd
2 GM SD 70 AC locomotives @ 6000hp a piece(12k,just a little more than my vert)

bluevenom867 · May 3, 2005

Mr.Yount,would you try to shift with out the clutch while in a race?

executioner · May 3, 2005

p.s so nobody is confused,the 500 rpm split applies when double clutching or using no clutch,hence using the jake to bring down rpm's. u can double clutch your 5.0 if you want(why?) but shifting with no clutch,while it can be done,is not good. if you want to try, try in higher gears.simple, at reasonable rpm in 3rd or 4th give it a little gas so itslips out of gear with no clutch,then as rpm's drop(500,might have to give it some gas if you miss it)it will slip into next gear, maybe. as i said it is hard and not advisable with 5.0 or most sychro tranny.s even for some one who did this for a living with trucks for years.

86mustangpower · May 4, 2005

You wouldn't want to clutchless shift when racing your car, it takes to long.

My friend was taught by his dad how to clutchless shift. His dad is a truck driver and he said he got a million kilometers on one clutch.

Michael Yount · May 4, 2005

bluevenom - Please - Michael. Mr. Yount is my dad.

Did you read the post? "I once lost the clutch on the starting grid of an SCCA race." The hydraulic slave cylinder broke while we were on the false grid - 5 minutes til race start. Had no choice but to go it without the clutch if I was gonna race that day. Not enough time to fix it. And when you have only 6-8 race weekends a year, and tow all your stuff all that way to the track - by God, you're gonna race with a clutch or without! SCCA - Sports Car Club of America - ROAD RACING. You can do it without the clutch (with a little skill/luck). Obviously if you're a drag racer and the clutch goes out - you're screwed. Not only can you not launch, but you need to be able to shift quickly on the strip. Almost all road racing is done with granny shifts. The drivetrain has to last for MUCH longer in road races. Can't take chances with power shifts - too hard on the clutch/tranny/engine. Shifting without the clutch doens't take much longer than the granny shifts would anyway. I won my class that day....

crazypete · May 4, 2005

I once asked a friend about powershifting while we were cruising around in his civic. He said "this" and hit the gas and simply yanked the transmission clutchless from gear to gear suddenly and violently. There was a little buzz each time.

Michael Yount · May 4, 2005

If you think powershifting is shifting without the clutch while holding the gas wide open - try it in your car sometime. And I hope your rev-limiting systems are working....

Killer50stang · May 5, 2005

seijirou said:
"Granny shifting, not double-clutching like you should" When I heard this line, in the theater, I couldn't help but to laugh very loud, much to the dismay of those around me.

Double clutching is granny shifting.

Recently double clutching has basically meant the same thing, but also implies that you just keep your foot in the gas the whole time.
Maybe they run crap transmissions, because I can keep my foot in it and just shift normally. Who knows.

Okay, you're wrong here. Ever heard of power shifting?? That's keeping the foot on the gas the whole time. That's what most guys do at the track...hard on the tranny.

Killer50stang · May 5, 2005

Speeds8erM-1 said:
If you are going to run nawzzzzzz you better get ARP Floorboard Studs

and his engine was loaded man...I mean I see a COLD AIR INTAKE...THAT MUST MAKE A 10 SEC CAR??

BJBS5OH · May 5, 2005

some ricer guys think that double clutching is for cars with turbos. they think it is better to rev teh engine in between shift to get the turbo spooled up so it is already spinning faster when the shift it into gear. Basically they have no idea what they are talking about and on of them comes up with some BS that they all like to believe and then it is something that racers do. they are all stupid.

seijirou · May 5, 2005

Killer50stang said:
Okay, you're wrong here. Ever heard of power shifting?? That's keeping the foot on the gas the whole time. That's what most guys do at the track...hard on the tranny.

Apparently I'm being misunderstood, so here's what I said in more precise words.

Origionally double clutching is as it has been described here several times, clutch in, out of gear, clutch out, clutch back in, and into the next gear. That is granny shifting, because your foot doesn't stay in the gas.

Lately when I hear a ricer talking about double clutching, It's the same procedure as I just described, but you keep your foot in the gas aswell. - This is like, double clutching version 2.0 or something. And probably what they were referring to in TF&TF

I just keep my foot in the gas, and shift normally. Clutch in, next gear, clutch out... aka, power or speed shifting.

Maybe, and I mean just a thought that popped into my mind, the ricers are double clutching (with their foot in the gas) instead of powershifting because their tranny's can't handle direct powershifting.

BJBS5OH - It is true that keeping your foot in the gas between shifts will help to keep the boost up. Primarily because your pressure relief system won't engage.

What the hell is double clutching?

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