TL-Rocket

Hey Folks,

Is there a way to turn off the rev matching on a 6MT?

TL-Rocket

o4Komodo

iTrader: (2)

Just out of curiosity... is there a reason why you want to eliminate this?

truonghthe

no, you can not turn off rev match.

TL-Rocket

It's silly - the purpose of driving a manual is to give you all the decision making power - if I want to match the revs on a down shift then I'll double clutch!

Bruce Banner

iTrader: (2)

I'm confused by this post........
I double clutch and rev match, I don't know how how to "turn this off"

FamilyGuy

6MT doesn't have rev match, only the autos have it.

o4Komodo

iTrader: (2)

If you blip the clutch in a certain way it will actually shoot up 500-1000rpms. 'course this is only good for going down 1 gear. Anything beyond that you'll need to do a proper rematch or double clutch.
source: done it many times on my 6spd

If I recall... we had a thread about this a couple years back.

justnspace

iTrader: (1)

maybe the correct term for it is called 'rev-hang'

cuz it doesnt match RPM's it just kinda hangs there for a few secs.

FamilyGuy

This is not what the OP is asking. He's asking how to turn off rev matching, which by the way he is asking it appears to indicate the he thinks the 6mt has a rev matching feature, which is an automatic control in the vehicle to automatically blip the throttle when the driver down shifts. The 6mt TL does not have this feature.

What you're describing here is manually rev matching on a down shift. Two completely different things. The 370z has rev matching in their manuals.

I'm guessing the OP thinks we have rev matching because when he down shifts, as he releases the clutch on the next gear down, he sees his RPMs jump up before he can "feel" the clutch grab, making him think the car is rev matching for him. But it's the clutch making contact with the flywheel that is causing the jump in the tach, not a rev matching feature in the vehicle.

This is most likely one of two things: (1) his clutch is beginning to slip so he doesn't feel the initial grab until right after he sees the tach jump and / or (2) he shifts too fast and the stupid check valve in the slave cylinder is why he's not feeling it grab before the tach jumps.

My car felt this way too in 1st and 2nd gear when I still had the check valve.

OP, remove your check delay valve from the slave cylinder. There's a how to here on Azine.

FamilyGuy

Justnspace has a point too. Could be rev hang / erratic throttle.

OP, have you done anything to the car lately, as in mods? Or have you cleaned your throttle body?

When do you see the tach jump, is it right when you disengage the gear that you are in, as you initiate the down shift (indicating rev hang / erratic throttle), or is it right as you are engaging the next gear down (indicating slipping clutch / check valve)?

justnspace

iTrader: (1)

^my 6mt rev-hangs stock.

i have to wait like a second or two for the RPM needle to fall down a bit, until i can get into gear.

FamilyGuy

Yea mine kinda did that too when I still had the OEM heavy dual mass flywheel. No longer the case with my lightweight flywheel now.

But if this is all that is happening then the OP is mistaking it for rev matching, since there is no "matching" going on.

A rev match would be a jump in the RPMs to match the lower gear that you're going into. Rev hang is just a hang at that same RPM point, doesn't move up or down.

My car acted real funny too after I cleaned my throttle body, and the TB plate was never touched manually either. I had rev hang, erratic idle (would fall to 800RPMs like normal, then jump to ~1200 and fall back down again every time it went from in gear to neutral). Only thing it didn't do was blip. I was about to make an appt with a dealer to recalibrate the TB on the HDS tool, but then it started to drive normally again took 2 weeks for the car to correct itself, drove me nuts.

ATLS_666

Although both events requires you to clutch in twice, rev matching and double clutching don't produce the same outcome.

TacoBello

Do you have an after market clutch? It shouldn't be doing that. I can blast through my gear changes as fast as I'm physically able to do so without issue

Jackass

There have been a handful of these threads over the past few years. We do have rev-hang that is tied to upshifts. We do not have rev-match for downshifts. If I run 1st to redline, push the clutch in, there are pauses at various RPMs that roughly correlate to the next gears.

And to be clear, I am not talking about a hang immediately when I push the clutch in. I am talking about the revs dropping down to the RPMs needed for the next gear and it hangs there for a sec.

Someone posted a video of it somewhere.

AlanW

If my 06 6MT has any rev-matching feature, I'm completely oblivious to it. If you want to rev-match, you do with your right foot. No hang, no pause, no BS (also no slave cylinder check valve)
God knows my wife has mis-shifted it enough I'd had noticed.

It does seem to have a rev limiter that will blip for a second when you hit redline

Adobeman

THIS !!

That's the only "rev matching" I know of in 10 years of having the MT. I've seen debate over the real reason is to do with emission control or really to anticipate the next gear. Either way I like it for up shifts.

But for downshifts you gotta rev-match on your own and even better if you double clutch.

justnspace

iTrader: (1)

Please read Jackass' response.

it's a characteristic of the car that you have to learn or get used to. Tacobella, you might be used to it or dont notice it at all...however, if you watch your tach, the RPM needle will pause

Jackass

Apparently he didn't like the same answer we gave him two years ago.

https://acurazine.com/forums/problem...tching-898320/

TacoBello

I've noticed the pause in the past, however, I don't have to wait 1-2 seconds to shift. I just do it. No issues.

I've heard guys rocking aftermarket clutches had extreme rev hang which required waiting before shifting. That's why I was wondering if you had yours replaced at any point.

TacoBello

Actual rev matching when downshifting is about half the reason I drive a manual. God, I love it so much, especially when perfectly executed.

Just blip dat throttle!!

justnspace

iTrader: (1)

stock clutch. it may not even be a full second. but the needle def. pauses before it comes down.

this "feature" makes a decent driver look horrible, but makes a novice look great!

ive learned the characteristic of the car and it doesnt bother me, because i anticipate the pause.

FamilyGuy

Good call on the upshift rev hang jackass.

I remember mine doing that when stock, not sure if it still does it today, but if it does, it's not as pronounced. Or maybe I just got so used to it that I don't notice it anymore.

There is no matching on downshifts though.

o4Komodo

iTrader: (2)

Yeah I guess I mistook it for rev-matching as a proper auto-rematch should put it into appropriate RPMs and not just blip a few hundred RPMs.

I tend to (think I) shift very fast. So when I disengage the clutch I see it blip 500 or so RPMs, hang for a moment, then fall (if I let it).

I've never actually downshifted while it hangs though. Always double clutched (and now recently heel-toeing)