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question about rev matching

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Old Jan 20, 2011 | 11:58 AM
  #51  
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Originally Posted by TheSteel,Jan 20 2011, 12:28 PM
Agreed. The first week or three I was taking too long upshifting and the revs would drop near idle and it was jerky. But once your shifting quickly the rev's match perfectly every shift.

I have a questions for the more informed then. When I approach a turn I'll disengage the clutch, brake hard and start going for the gear which I know I need to be in for the turn. Some times when going from 3rd or 4th gear into first the shifter fights me on putting it into first. I've actually had to ride the clutch through more then one turn. Any ideas? (22k miles btw)

And this has never happened on any other manuals I've driven, granted they were all slushboxes from ford.
Someone correct me if I'm wrong but I think this is the first gear synchro. Depending on what speed you're coming down from and how hard you are braking, it has to do a lot of work to get the transmission ready to be put in gear.

I rarely have to go all the way down to 1st for a turn, obviously depending on the situation. Usually 2nd is fine, even from 10 mph or so.

A suggestion that you may want to try:

In 4th getting ready for turn.
Clutch depressed
Shifter into 3rd (clutch still depressed)
Shifter into 2nd (clutch still depressed)
Shifter into 1st (don't force it but put constant pressure against the synchro, give it time to work)
Rev Match
Clutch out

Anyone have any opinions on if this will work? and if it will hurt the car? I'm still in the learning process as well.
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Old Jan 20, 2011 | 12:02 PM
  #52  
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Originally Posted by TheSteel,Jan 20 2011, 12:28 PM
Agreed. The first week or three I was taking too long upshifting and the revs would drop near idle and it was jerky. But once your shifting quickly the rev's match perfectly every shift.

I have a questions for the more informed then. When I approach a turn I'll disengage the clutch, brake hard and start going for the gear which I know I need to be in for the turn. Some times when going from 3rd or 4th gear into first the shifter fights me on putting it into first. I've actually had to ride the clutch through more then one turn. Any ideas? (22k miles btw)

And this has never happened on any other manuals I've driven, granted they were all slushboxes from ford.
dont skip gears
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Old Jan 20, 2011 | 12:16 PM
  #53  
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This thread.
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Old Jan 20, 2011 | 12:52 PM
  #54  
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Trying to put actions in to words has caused too much incorrect information.

I'm going back to the 'normal' way I drive...which seems to be correct..as this thread goes south.
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Old Jan 20, 2011 | 01:22 PM
  #55  
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Originally Posted by RedCelica,Jan 20 2011, 08:16 AM
DOUBLECLUTCHING ON AN UPSHIFT IS COMPLETELY AND UTTERLY POINTLESS

...come on people....


ricers got confused from watching F&F

"Granny shiftin', not double-clutching like you're suppose to" -Dom

Moral of this story, don't be a moronic ricer.

If you have glue-on brake caliper covers that say 'Brembo,' double-clutch on your upshifts...otherwise don't be a retard.
not true, the S loves to fall into a certain gear at a certain RPM. I double clutch rev match upshifts and my transmission loves me for it.
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Old Jan 20, 2011 | 01:27 PM
  #56  
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Originally Posted by S14 to S2k,Jan 20 2011, 10:49 AM
lol @ ppl trying to blip the throttle on upshifts

but yea it's letting the rev drop to the perfect spot before engaging the clutch in the next gear.
rev match doesnt always mean revving up the throttle.

I rev match upshifts:

1) in 1st gear, going into 2nd.
2) clutch in
3) stick to neutral
4) clutch out, - my throttle pedal is kept at the speed the engine should be at for the next gear, it depends how fast im shifting but sometimes it pulls the RPM DOWN, sometimes it increases the RPM.
5) clutch in
6) stick into 2nd gear
7) rev slightly
8) clutch out.

My d/c rev match upshifts are because I don't shift at the same speed all the time. Roads here are terrible so I time my clutch/throttle inputs around potholes on the ground. have you ever tried to clutch out when the roads bumpy? Not a good idea. Because I DC rev match, I can pick and choose when, where, what RPM, and not have to memorize timing of the shift.

If you dont dc revmatch, you will have to memorize a certain shift timing per RPM, per gear to get a proper shift. (rate of decrease of RPM of input shaft isnt the same at high RPMs as low rpm)
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Old Jan 20, 2011 | 02:19 PM
  #57  
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^^ I agree it depends on the situation in front of you.

But given an ideal situation driving in a straight line in a normal fashion, it is not required to rev match UP when you upshift (ie. you dont need to blip the throttle) UNLESS you are a lazy shifter.
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Old Jan 20, 2011 | 02:24 PM
  #58  
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Originally Posted by TheSteel,Jan 20 2011, 12:28 PM
Agreed. The first week or three I was taking too long upshifting and the revs would drop near idle and it was jerky. But once your shifting quickly the rev's match perfectly every shift.

I have a questions for the more informed then. When I approach a turn I'll disengage the clutch, brake hard and start going for the gear which I know I need to be in for the turn. Some times when going from 3rd or 4th gear into first the shifter fights me on putting it into first. I've actually had to ride the clutch through more then one turn. Any ideas? (22k miles btw)

And this has never happened on any other manuals I've driven, granted they were all slushboxes from ford.
This is what I do and I'm not saying its the 'correct' way.

If I'm in 4th at 40 mph and can take the turn at 10-15 mph, I'll...
1) clutch out
2) brake
3) make the turn
4) while im making the turn I...
5) clutch in
6) rev match (b/c at this point my revs are at idle)
7) clutch out and go

And I know good practice is to downshift all the way to the turn, so your car is always in gear just in case, but I'm lazy like that
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Old Jan 20, 2011 | 02:27 PM
  #59  
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Originally Posted by spook,Jan 20 2011, 11:40 AM
There is some serious misinformation going on in this thread.
i agree....and there's 3 pages of it too....someone needs to delete this thread....

this topic has already been beaten to death in the past. actually, someone should do a proper right up on rev matching and double clutching then sticky it at the top of the forum page.
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Old Jan 20, 2011 | 02:35 PM
  #60  
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Is it ok for the tranny to skip gears down if I double clutch?
i.e
6th -> 4th
brake to 40ish
clutch
neautral
clutch
4th
rev match
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