can anyone explain this to me a lil better than my friends can?

 

EH.

 

http://www.epinions.com/auto-r...prod4

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tico &raquo;</TD></TR><TR><TD CLASS="quote">can anyone explain this to me a lil better than my friends can?</TD></TR></TABLE>
It is used for rev-matching the transmission input shaft with the output shaft during downshifting.

clutch in -&gt; select neutral -&gt; clutch out -&gt; rev match -&gt; clutch in -&gt; select gear -&gt; clutch out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Targa250R &raquo;</TD></TR><TR><TD CLASS="quote">
It is used for rev-matching the transmission input shaft with the output shaft during downshifting.

clutch in -&gt; select neutral -&gt; clutch out -&gt; rev match -&gt; clutch in -&gt; select gear -&gt; clutch out</TD></TR></TABLE>ok

 

correct me if i'm wrong... double clutching is mainly used for trucks...
and don't are tranys have syncros... which is why we don't need too?

 

"granny shiftin not double clutchin like you should...."

 

Somebody was going to say it^^^

 

"IF YOU AINT OUTTA CONTROL, YOU AINT IN CONTROL"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dontgivafuk &raquo;</TD></TR><TR><TD CLASS="quote">"IF YOU AINT OUTTA CONTROL, YOU AINT IN CONTROL"</TD></TR></TABLE>
lol when my gf heard, that on the preview she was like whaT????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Targa250R &raquo;</TD></TR><TR><TD CLASS="quote">It is used for rev-matching the transmission input shaft with the output shaft during downshifting.

clutch in -&gt; select neutral -&gt; clutch out -&gt; rev match -&gt; clutch in -&gt; select gear -&gt; clutch out</TD></TR></TABLE>
This. But, your car has synchro's now, so you don't need to do this anymore, and if you do, ...you're an idiot.

 

^ You are correct sir. If you have syncros in your tranny (which we all do now-a-days) then you don't need to. You can and it will save you syncros from going out as fast if you didn't. But it really is pointless.


No wonder the site has 20 million posts. I'm willing to put my car and all the money to my name that more than 75% of them are like this:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TaylorEj1 &raquo;</TD></TR><TR><TD CLASS="quote">EH.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrinacivic &raquo;</TD></TR><TR><TD CLASS="quote">ok</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ8kid &raquo;</TD></TR><TR><TD CLASS="quote">"granny shiftin not double clutchin like you should...."</TD></TR></TABLE>

Good thing I've only been here for 2 years... I only witnessed the last half of the fall of this board.


V Touche to you sir.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC4life 96 &raquo;</TD></TR><TR><TD CLASS="quote">No wonder the site has 20 million posts. I'm willing to put my car and all the money to my name that more than 75% of them are like this:

Good thing I've only been here for 2 years... I only witnessed the last half of the fall of this board. </TD></TR></TABLE>

man your just a chicken..... 85% is more like it...
think of all the other post

Yes!
Search!
VTEC!

common 75% is to little

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SovXietday &raquo;</TD></TR><TR><TD CLASS="quote">This. But, your car has synchro's now, so you don't need to do this anymore, and if you do, ...you're an idiot. </TD></TR></TABLE>
Great, so I'm an idiot because I'm trying to avoid a $600 rebuild of my 253,000 mile transmission.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00siandrew &raquo;</TD></TR><TR><TD CLASS="quote">Somebody was going to say it^^^</TD></TR></TABLE>

i know...im an *******

85% sounds good

 

Double Clutching = Pointless, tears up your tranny quick

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EkSi &raquo;</TD></TR><TR><TD CLASS="quote">Double Clutching = Pointless, tears up your tranny quick </TD></TR></TABLE>

could someone friggin explain technically how.. then just saying stuff like it tears up your tranny, or your an idiot if you do...

explain someone!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SovXietday &raquo;</TD></TR><TR><TD CLASS="quote">
This. But, your car has synchro's now, so you don't need to do this anymore, and if you do, ...you're an idiot. </TD></TR></TABLE>

True you don't have to double clutch...
And true it will help out your synchros if you do...
But how am I an idiot for doing it?

BTW have you ever tried shifting from 4th to 2nd as you are trying to accelerate to pass someone?

It makes it 3 times more enjoyable if you double clutch...

 

i thought DOUBLE CLUTCHING was when you were rolling in first at like 10mph and you push the clutch in and rev to like 6 or 7k ish and let the clutch out

yeah thatl tear a tranny up quick

 

Wikipedia is your friend.

http://en.wikipedia.org/wiki/Double_clutching

 

i think you people need to read and figure out what double clutching is and why you do it before you call someone an idiot for doing it just becuase ur car has synchros

and you should listen to targa because hes the man

even tho ur car has synchros, dropping from a high gear at a low rpm to a lower gear that will be at a much higher rpm will still put a lot of load onto ur synchros. and thus will reduce the life of your transmission. double clutching reduces this wear on your synchros by matching the input shaft of ur transmission to the output shaft (as targa said) so your synchros dont have to do as much work, meaning LESS wear on your transmission. so no you dont have to double clutch, it will go in gear if you just mindlessly shove it in gear. but it will tear the **** outa ur synchros and you will be rebuilding ur transmission much earlier than you would if you double clutch.

so i think double clutching would qualify you as smart... not an idiot

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ8kid &raquo;</TD></TR><TR><TD CLASS="quote">"granny shiftin not double clutchin like you should...."</TD></TR></TABLE>

ROFL!!!!

eg is right.. I bet this came up after watching fast n furious the 10000th time and thought double clutching sounded cool

 

finally someone explains rite. egcivic knows his ****. and it's not nice to call ppl stupid when you dont know **** urself.

 

iono what dickless morons are saying double clutching now is stupid, no matter how you shift double clutching statstically (even on everyday synchroed cars) preserves the clutch/transmission, ask any mechanic whos' been in teh business awhile (4 years working on hondas isn't qualifying), I'm talkin 20 years working on all sorts of cars, they'll tell ya...

 

Okay, here's the deal.

Inside of a transmission you have two shafts with stacks of gears. A 5-speed transmission has two shafts with 5 gears on it each. 10 gears, two shafts, 5 on each shaft.

for example, a zc 5th gear is 0.878 and is 29/33 29 teeth on the countershaft gear/33 on the mainshaft gear.

now lets say you have 10 on the mainshaft and 20 on the countershaft, that's a 2:1 ratio. you have all these different ratios as torque multipler (anything greater than a 1:1 ratio) and sometimes 4th or 5th is a torque divider (anything lower than 1:1 ratio)

by design, 5 of the gears spin freely. 2 of the gears (1st and 2nd) on the countershaft spin freely while 3-5 are locked into place on the countershaft. The mainshaft however is the inverse of this, 1-2 locked into place, 3-5 being able to spin freely.

Whenever you shift into a gear, say 2nd, all you do is slide a sleeve onto the freely spinning 2nd gear that locks it into place. This engages 2nd gear. say you're done with 2nd and you're about to shift into third. When moving the shift lever, this first disengages 2nd gear and engages 3rd, locking 3rd into place.

Due to the different gear ratios, the gear spin at different rates. like when you're in 2nd gear on a 92-95 civic ex (1.9 gear ratio) your mainshaft will spin 1.9 times for the countershaft to spin once. Well 3rd gear (1.25) will spin 1.25 times instead of the 1.9 times that 2nd is spinning. so at 6000 rpm in 2nd gear, 2nd gear spins 6000rpm and 3rd gear is spinning 3947.368 rpm.
(3rd gear divided by 2nd gear) * (engine rpm)

basically, in order for that sleeve to slide onto the teeth of teeth of the gear and lock it in place, the gear has to be spinning at the same rpm. So think about this, your engine is spinning 6000rpm and the shaft is spinning 6000 rpm, but that 3rd gear that you want to go into is spinning 3947 rpm, well it has to start spinning that gear near 6000rpm before that sleeve can slide onto the gear and lock it in place.

Synchros are made out of brass which is a soft metal here's a stack of about 20 of them


So basically, that gear is spinning at a slow certain rate, and if you use the synchronizer to speed it up (instead of slowing the shaft down / decreasing engine rpms) the synchro is going to have to work harder to pull that gear up to speed.

however, if you were to let the rpms drop down to that 3947 or whatever i said it was, it would have to do very very little work in matching the gear speed with the engine speed.


After a while of driving a car, you should get the rhythm down, and know how fast/slow you need to shift without jerking the car around. The more your rev match, the less your synchros have to work.

Ever ridden in a car when someone downshifts without "blipping" the throttle? Letting the transmission pull the engine up to speed? BLAHH I hate that ****. I just wanna backhand them because they're not thinking about what they're doing.

Basically, in a nut shell, synchros are brake pads for our gears. The less you rev match, the harder they work, the sooner they wear out. Once they wear out, you'll be using the teeth on the synchro sleeve to grind against the teeth on the gear. And that is what will bring the gear up to speed. This may work temporary, but it will soon wear out so much that there won't be enough teeth left on the gear and sleeve to hold the pressure and the gear will pop out. (disengage)


Hope that helps.

we need a transmission forum damnit.