Double Clutching

[45psi]

it makes no sense to me... punching the clutch, halfway through a gear? please explain.

[pip]

power shifting is good enough

[original2k]

i dunno i think their saying that when u shift regularly the car disengages and goes down in rpm/speed, that's when u experience that "lurching" effect as he called it, then u re-engage the clutch but your starting at a lower rpm/mph and u sorta have to work your back up for that few seconds to actually begin accelerating again, what their trying to say is that when u double clutch (done correctly), when u disengage and then rev in N, your basically trying to match the RPM u left and re-enter that gear without sacrificing power or acceleration.

ok i know i'm not helping by continuing to milk this thread but i just felt like being part of the problem

[87accordlxph]

Originally posted by original2k
i dunno i think their saying that when u shift regularly the car disengages and goes down in rpm/speed, that's when u experience that "lurching" effect as he called it, then u re-engage the clutch but your starting at a lower rpm/mph and u sorta have to work your back up for that few seconds to actually begin accelerating again, what their trying to say is that when u double clutch (done correctly), when u disengage and then rev in N, your basically trying to match the RPM u left and re-enter that gear without sacrificing power or acceleration.

ok i know i'm not helping by continuing to milk this thread but i just felt like being part of the problem

heh, that's ok dude, thanks for the help though.

Speaking of milk, I'm drinking a big ass cup of it right now.
You know what they say, "Milk does a body....GOOD!"

Take it easy,

-Mike

[PogiLXI]

This Thread is far from over. Double Clutching Alows the Tranny To Speed up faster then the motor. It has nothing to do with Sychronized trannys. When ur shifting, between shifts the tranny slows down , and it gives more ware on the Clutch.

This double clutching alows the Flywheel to spin as much or more then the clutch, So when you drop the clutch at high Rpms there isnt that much difrence in between the two. It Gives less shock to the Tranny and the whole system.

It is True Double clutching was used on old Trannys, When they didnt have Sychros, But there is a plus when using this on new trannys.

[adams86lxi]

here is the exact definition of double clutching from howstuffworks.com: The transmission shown here does not have "synchros" (discussed later in the article), so if you were using this transmission you would have to double-clutch it. Double-clutching was common in older cars and is still common in some modern race cars. In double-clutching, you first push the clutch pedal in once to disengage the engine from the transmission. This takes the pressure off the dog teeth so you can move the collar into neutral. Then you release the clutch pedal and rev the engine to the "right speed." The right speed is the rpm value at which the engine should be running in the next gear. The idea is to get the blue gear of the next gear and the collar rotating at the same speed so that the dog teeth can engage. Then you push the clutch pedal in again and lock the collar into the new gear. At every gear change you have to press and release the clutch twice, hence the name "double-clutching." Here is the link to the how manuel transmissions work http://auto.howstuffworks.com/transmission.htm pretty much from what i new semi trucks use it because their transmissions are meant to last as long as the motor 500k and with syncros the motor would not last as long because syncros dont tend to last as long as they may need them, so they dont put them in their.So semi truckers would need to double clutch so the gears dont grind. I heard about this on horse power tv.

[Justin86]

Double clutching what is that. I'm learning how to do it in the big rigs. The cool thing is shifting with no clutch. I got it down ok in my little truck.

[PogiLXI]

still talking about Double clutching in old, Big rigs and Serrious race shit, Double clutching is still useful on modern Trannys.

[Magny]

man if ya know how to shift the damn stick really fast with a flick of the wrist (kinda like snaping a towel at someone) and let the clutch out fast, you wont loose speed.

I hella raced alot of people doing this and it works a hell of alot better than double clutching. tried it both ways to fool around with the difference and to me my way is the better way.

get the skills damn it!!! j/k :lol

[PogiLXI]

yah, If you can Shift fast enough for it, But you run the Risk Of Crunchin them Synchros. double clutch it if you can, but In Reality, if ur double clutching in racing and you dont do it quick enough your Losing the point. Takes ALOT of Practice, and Grinding. some people dont even want to try, and Just say Screw it. and Dont lift to shift- Thats someone Signiture on here.

[rubberburner]

My dad showed me how to double clutch. I don't know much about the insides of trannies, but I do know that double clutching is WAY faster than using the synchros. Double clutching is also essential for me to get into first gear if I'm going any faster than 10 km/h. I dunno if that's because my 1st synchros are boogerd, or our cars are just like that.

After I mastered the double clutch, I started working on shifting without the clutch. After lots of grinding, and a few teeth later, I figured it out. It doesn't work to good shifting up, but works perfectly shifting down.

[bobafett]

ok i dont want to read all of this thread, but i read the good explanations.. here is something i am not clear on.

is it bad, good or ok, they way i downshift?...

basically going from 3rd to 2nd to go around a corner, i will just put in clutch. rpms naturally fall, so i rev while changing gears, and clutch is still in. and i bring rpms up to the point they will need to be so the car does not lurch. by the time the rpms are up, stick is into the next gear, so i let out the clutch. it works well, and i can do it relatively quickly, and without any lurch or grind. but im sure its not double clutching. is there any point to what i am doing, or should i just let the synchros do all the work for me?

[86AccordLxi]

Sounds like you're just rev-matching...that's good since it provides for less wear on clutch.

alex

[rubberburner]

i will just put in clutch. rpms naturally fall, so i rev while changing gears, and clutch is still in. and i bring rpms up to the point they will need to be so the car does not lurch.

shouldn't you let the clutch out while your in neutral so that the insides of the tranny get moving? i dunno, maybe there are no insides to be turned while in neutral.

[PogiLXI]

Originally posted by rubberburner
shouldn't you let the clutch out while your in neutral so that the insides of the tranny get moving? i dunno, maybe there are no insides to be turned while in neutral.

Thats the point of double clutching. And there are insides turning, if ur letting the clutch out but in nutrual and let the Rpms Fall, Ur missing the point of double clutching, You have to Blip the gas to get the Tranny\flywheel Up to speed.

[Magny]

Even if you did do rev matching, basically to the point where you left off, then you engage the clutch by letting go, it still drops dramatically.

[PogiLXI]

IT doesnt drop Dramticly. It would Drop to what ever point its suposed to be at, the point of the Double clutch is so it Doesnt Lurch, Its better to Mesh the fly wheel and Clutch that are spining the same speed Rather then Drasticly difrent Speeds.


You want The flywheel to be spinning fast It helps to keep from Ware on the Clutch.

[Magny]

yeah tru, just like the rev matching but if ya miss it youre probably gonna end up missing the teeth and shoot the gear off, but thats like what 1:1000 chance it will happen. lesser wear on the clutch is better but hope you dont miss it and screw the gears up.

[PogiLXI]

Ur talking about not Disingaging the clutch and just force the gears. This isnt Double clutching.

[Magny]

hell no i aint talkin about that, you gettin the info wrong buddy. read it again until you get it.

[MrBen]

What the hell. There are so many stupid opinions on what it is, it is insane. The answer was given a LONG ASS TIME AGO. Let the thread die for christ's sakes.

[Magny]

hehe cheers bro let it die HAHAHA deal with it

J/K

just a bunch of newbs tryin to be a racer, BTW so what if i am a newb on here its almost done just a few more to go and I get to be a DX user HAHAHA

[PogiLXI]

Go ahead, Whore it up.