Okay, didn't know what forum to post this one in.. so I'll put it under the Transmission one.

Anyways, my understanding of double-clutching is that when you want to downshift, you push in the clutch, shift to neutral, take your foot off the clutch, hit the gas to raise RPMs, then push in the clutch, and shift to the lower gear and this is supposed to help prevent tranny wear and tear.. However, my question is... is this any different than when you want to downshift you simply push in the clutch, shift to the lower gear, and give the car more gas to raise the RPMs right before you let the clutch back out?
Anyways, on a side note, what sparked me thinking about this is I was watching Fast and the Furious yesterday and Dom says to Brian right after their first drag when he almost blows his intake, "You were granny shifting, not double-clutching like you're supposed to..." but now that I think about this, why would you double-clutch in a straight out quarter mile drag? Anyways, any help is appreciated smile.gif Thanks! rolleyes.gif

 

it pretty much just gives you an extra boost out of the gear you are already in. Just push in the clutch...hit the gas...and let out. You'll feel the extra jolt. Or..well..that's how I do it

 

This is by far the best article on double clutching I have ever found:

http://www.g-speed.com/pbh/double-clutch.html

And for some explanations on transmissions:
http://www.howstuffworks.com/transmission.htm

Enjoy.

And I double clutch for fun sometimes, it can result in a smoother downshift when done properly...but generally don't have time to mess with it at the track. As for heel toe, the way I drive it ends up upsetting the balance of the car so I usually come off the brake, blip the throttle, downshift, back on the brake. But that's just me.

 

You don't need to double clucth or what ever that is with old school transmissions.

 

You double clutch mostly to save wear and tear NOT on the clutch, but rather the synchronizer rings in your transmission. Just pushing the clutch in and going to the next gear means that you rely fully on the synchronizers to "synchronize" (duh) the speed between the input shaft and output shaft of your tranny.

Rather, when you engage the clutch in neutral, you're still spinning the input shaft even though you're not in any gear. You give it gas to get it all moving faster, and THEN you shift gears. Doing it this way makes the synchronizers not work as hard, makes shifting faster and usually a LOT smoother.

You have to practice quite a bit to make it fast, but it's not too hard...

-Red-

 

I usually only do it on motorcycles. Really it is just too much of a pain in the a$$ to do in a car. Most of the time in traffic, unless you can heel/toe it, it becomes very difficult to come to a smooth stop.

 

you can feel an even bigger jolt of power if you flat shift your car....just don't miss a gear cause if you do you'll blow it up

 

You won't blow it up, you have an electronic rev limiter built-in. So long as you don't shift into the wrong gear (4th to 2nd) then you're fine. You can keep the car in neutral and put your foot to the floor and it will not over-rev.

-Red-

 

What about:


Leaving your foot on the gas while pressing on the clutch and shifting gears and then letting off the clutch? Never lifting the foot off the gas pedal. the SS helps here alot. Just dont miss gears and dont let off clutch before you hit your gear entirely.

Any problems with doing it this way? this is how I shift when I race. Keeps the rev's up.

 

That is called power shifting you get more of a boost from the engine staying up in revs but it is very hard on the trans to do this! Unless your trans has been built I don't recomend doing this!!!! tongue.gif