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I think it takes too long. But I agree that it's cool. You can drop the clutch with full confidence that the RPM's are in the right place.
I hardly ever use the feature because I've already shifted into the next gear and it's time to release the clutch before the RPM's start to fall. Waiting for the rev match everytime would be hell I think.
It does take a bit too long, but the revs drop slowly for emissions purposes so they probably can't help that much. I would like to see the revs match on down shifts, which could easily be programmed. There would have to be a switch for "Automatch (TM :-) Off" of course. I wonder who at Honda we could talk to about that??? Funny the feature is not in the manual.
greenspeed - basically when accelerating, when you clutch the reves drop down to the approporiate RPM for the next highest gear at that given roadspeed, makes for smoother shifts. to witness it, accelerate through 2nd gear to about 3500rpm, engage clutch for a few seconds and watch the rpms hover around 2000 waiting for you to let the clutch out.
Interesting. I understand the theory in good heel-to-toe driving. Like the professionals. However I've not had great luck in achieving this on my own. Perhaps more learning, but I'm intrigued about this rev-matching trick. I'll have to try it when I get my TL. Is this something that can be turned off or on. I never noticed this during my test drive.
To my knowledge can not be turned on or off and is not in the manual. Works great for someone who shifts slowly...If you do not rev high enough (3500 or so) it does not work and does not work if you skip a gear (which with a 6 speed could be pretty often).
Originally posted by erikmoeser It does take a bit too long, but the revs drop slowly for emissions purposes so they probably can't help that much. I would like to see the revs match on down shifts, which could easily be programmed. There would have to be a switch for "Automatch (TM :-) Off" of course. I wonder who at Honda we could talk to about that??? Funny the feature is not in the manual.
Automatch would be cool. SMG BMW M3's have that. (The auto M3 with a clutch and all)
Pretty neat....at the moment I'm over revving when trying to rev match on downshifts cuz I'm used to my Prelude still.
Never noticed it since I never wait for revs. I do a fast in and out and thats it. If I'm going for max my issue is trying to not over rev when clutching since I barely remove my foot off the accelerator. The only time I dable with the clutch is on downshifts.
Rev matching is for downshifts, and is done manually. I think the feature that you are describing would be more appropriately described as gear synchro.
Whenever the two "plates" are turning at the same speed it is a match.....call it whatever you want. It is easy to over rev on downshifts since the acellerator is pretty sensitive and doesn't require much of a stab to blow the revs past where you want them.
No need for Mr. Smartass to point that this is very old thread, thank you.
My 2007 TL Type S does not seem to rev match. Is the type-s the exception? My RPMs fall to idle speed when activating the clutch. Not really important for me as I'm competent at rev matching when up or downshifting, I'm just curious if something on mine's broken/disabled.
"Developed from the RL's 5-speed automatic, this unique transmission has high torque capacity, yet is very compact. It also features Acura's Sequential SportShift system. Inspired by Formula One® racecars, Sequential SportShift gives the driver the flexibility of a self-shifting automatic or the precise control of a manual. The system has been programmed for smoother operation and enhanced gear holding capabilities. In addition, the TL Type-S "rev matches" the engine during manually selected downshifts."
As other have said it was believed to be a side effect of emission control but whatenver the reason when going up through the gears in my 05 6MT the revs absolutely drop, then "hang" for a second at what seems to be the exact RPMs for the next gear and then finally drop to idle. If you shift quickly or slowly you will miss it. Clutch-out during the "hang" and things seem perfect.
But that's only on the way up. On the way down you are on your own to double clutch and rev match.
Never understood people calling out others when clearly the person bumping the thread did a search and posted a relevant question to the thread.
Geeeezzz. Don't take me so seriously. I probably wouldn't have even noticed it if SurfingScotty hadn't pointed it out. But once he called attention to it I had a little fun (or maybe not from your POV) It's not like I just said that and didn't add my relevant experience with topic in opposition to what alexb92 was saying.
There was another thread where more then one person posted video of the behavior.
Now, the behavior may be different year to year, but for sure my '05 does this clearly. If I run 1st to 6k RPM, clutch in, and watch, the RPMs will drop and pause multiple times at exactly where it should be for the next few gear shifts. If I am downshifting, I can cruise at 65mph on the highway, clutch in, blip the throttle way higher than it needs to, the RPMs will drop to exactly where it needs to be, clutch out, smooth engagement.
This is not that it just "hangs" at the same RPM when you let off the throttle. The RPMs actually drop, pause, drop, pause, drop, pause, then idle. I have had rev hang in another car...very different behavior...my tC was a real PITA to drive smoothly due to how the revhang of the throttle worked.
Yeah, mine def does not do this. Looks like it would be an obsolete "feature" as I shift way before this would be useful. Now, downshift rev matching would be nice...heel/toe shifting is a bit tricky with the TL.
My 05 6MT definitely DOES the rev match on down shifts as Jackass explained. Not really a feature I use since it's a little awkward to engage on purpose (seems to only work over a certain rpm). It's also a fair-bit slower & distracting than my typical double-clutch downshifts.
On up-shifts, I shift my TL slowly to keep it as smooth as possible. I try my best NOT to observe the tach as this always results in more jerking around. I would guess it's my eyes & feet trying to fight whatever the computer is doing in the background. I've had this car since 06 and it's definitely the smoothest way for me to up-shift. I would not be surprised the ECU is rev-hanging on purpose.
This is not that it just "hangs" at the same RPM when you let off the throttle. The RPMs actually drop, pause, drop, pause, drop, pause, then idle. I have had rev hang in another car...very different behavior...my tC was a real PITA to drive smoothly due to how the revhang of the throttle worked.
I've had it for 6 months and I just realized today the TL did this. That's pretty cool if not a little useless for most competent drivers.
I've found it doesn't work well for the 1-2 shift. For that shift I have to be giving it gas just as the clutch is engaging or it won't shift smoothly. For the other gears it works well.
The 1-2 shift takes forever in general. I found I have to slip the clutch slightly if I want to engage it sometime this millennium. Unless the car is cold, in which case the RPMs drop like a rock immediately. Is there a way to always have the car do that?
The 1-2 shift takes forever in general. I found I have to slip the clutch slightly if I want to engage it sometime this millennium. Unless the car is cold, in which case the RPMs drop like a rock immediately. Is there a way to always have the car do that?
It sounds like you’re having rev-hang issues. My g/f’s 2012 Civic SI has terrible rev-hang. It’s like; accelerate, let off gas/depress clutch, shift and wait...............for revs to drop then let clutch out/accelerate.
google rev hang delete
my TL does not rev hang and my 911’s revs drop like a rock.
I'm guessing you had yours tuned? How else could you get rid of rev hang
My stock TL-s had rev hang quite bad in stock form. Cars got a lwfw and a Hondata Flashpro now. I posted a video in the drivetrain mods thread I made if you want to see it in action.
I'm guessing you had yours tuned? How else could you get rid of rev hang
Nope, totally stock. The only mod I did was remove the check valve from the slave cylinder. After I did that, clutch disengagements are sharp and crisp.
Nope, totally stock. The only mod I did was remove the check valve from the slave cylinder. After I did that, clutch disengagements are sharp and crisp.
I did that too, but 1-2 shift still takes forever. Definitely 100% worth it overall and makes it better, but I hate shifting into second lol
This is a photo that I took in 4/30/2006 of a 23T mainshaft 3rd gear for D-series that was made by Infinitude (MFactory) when Patrick Seto (MFactory) sold me their 3rd & 5th gearset at cost for me to test out / post a write-up on whats involved in getting it working in a D-series transmission. I took a few pictures of it because I was so fascinated with it and thought it was cool. I have tried to use it as my avatar on all Honda tuning forums.
Meeting with gear manufacturer in 3 weeks on the stuff we're planning to make.
This is a photo that I took in 4/30/2006 of a 23T mainshaft 3rd gear for D-series that was made by Infinitude (MFactory) when Patrick Seto (MFactory) sold me their 3rd & 5th gearset at cost for me to test out / post a write-up on whats involved in getting it working in a D-series transmission. I took a few pictures of it because I was so fascinated with it and thought it was cool. I have tried to use it as my avatar on all Honda tuning forums.
Meeting with gear manufacturer in 3 weeks on the stuff we're planning to make.
