Official Nissan 370Z Synchro Rev Match Transmission thread

[AK370Z]

Okay guys, I got the official answer. Big thanks goes out to the member here (who's really high up in Nissan USA) who developed this technology for the new 370Z.

Originally Posted by Nissan USA

SynchroRev Match can help with upshifts by holding the RPMs when the clutch is disengaged rather than dropping them to idle like a normal car would.

For drivers who take longer to shift, this can help them be smoother since the revs won't drop down to idle immediately.

Of course, if you wait too long I believe the revs will go to idle, but as soon as the gear shift lever is moved in the direction of a gear the system will set the revs at the appropriate RPM for that gear.

Sorry for the lengthy explanation...it's much easier to understand if you have a chance to experience it.

You learn something new everyday!

[mattkim85]

great to know

[wanta370]

Does this mean you can just dump the clutch when up or down shifting?

And does it stay on even when the engine is turned off, you get out of the car, turn on the alarm, come back the next day, turn off the alarm, get in the car, and start the engine?

[Skaterbasist]

Originally Posted by TomatoEvo

I noticed this in a video a few weeks ago. I didn't know it was the synchroshift at the time, thought it was just a heavy flywheel, a clutch delay valve or something of that nature.

You can actually hear the upshifts hang on this video of the Mine's track test.

That has absolutely nothing to do with what the syncro-rev match is "supposed" to do in an upshift according to the OP's post.

The reason you hear what you hear in the video is because he is powershifting. Anyone can do that on a manual tranny.

[Matt]

[SHIFT_Z]

ok, im confused on the syncro-rev upshifting deal...

[Skaterbasist]

Originally Posted by SHIFT_Z

ok, im confused on the syncro-rev upshifting deal...

For anyone who owns a manual transmission, its a pretty simple concept. If you shifts are slow, meaning the RPM's climb lower than they are supposed to for the next shift, the synchro rev-match keeps the RPM's from falling under the desired RPM's for a smooth transition. (In the other hand, as I experieced in my test drive, if you release the clutch too early, and the RPM's are higher than they are suppose to be, the car will still jerk).

In my opinion, unlike the downshift feature, which would be somewhat useful for a more difficult move like heal & toe, this feature on the upshift is a pure nanny-gadget for those who cant drive a manual.

Rev matching for downshifting or upshifting is a piece of cake and something everyone should master. Assistance for Heal & Toe is atleast a little more comprehensible.

[joentown]

As I see it, there is no driver required interface to rev-match an upshift. You just shift normally and the car reacts to your action. however, the benefits of a proper rev-match will be less noticeable than for downshifts.

[TomatoEvo]

That has absolutely nothing to do with what the syncro-rev match is "supposed" to do in an upshift according to the OP's post

I think there is a clear correlation between the video and the fact that we know that the system is holding RPM until you shift into gear.

If he is powershifting he is taking his sweet time to do so. If you look at any other Best Motoring clips he never keeps his foot down on the gas while shifting. (race, time trial, whatever.) From my humble experience, there is very little benefit to doing so on a circuit.

On another note, for some reason the Rev-up 350z's also did this when driven agressively. So, I can't say conclusively that its the SynchroRev, maybe its a heavy flywhel or clutch delay valve. Maybe the causes are different and the effect is the same, Idk? Maybe someone with a Rev-up 350z can tell us why?

Or better yet, some of the new 370z owners need to start flogging their cars and tell us.

[Skaterbasist]

^ You can hear the revs quickly rise as he shifts (that's more than just holding the RPM's). I'm pretty sure he is powershifting.

Like I said in another post, I personally experimented with the 370Z and the syncro-rev match feature and I didn't so such a thing.

P.S. By "holding" the RPM's, they mean holding the RPM to the proper RPM of the next gear. In other words, would only happen during very slow shifts. So it isn't going to be holding an RPM at such a high RPM.

[JTso]

I'm curious if the rev-match is implemented via a DBW throttle system? I've read the spec sheet under the FAQ but didn't see DBW as part of the induction system. Does anyone know?

[BoostedMKIV]

I hate to rain on the parade, but is anyone else concerned that this synchro rev-matching feature will be the achilles heel of the 370Z in its first year?

I'm probably just being paranoid, cuz I bought one of the first 2003 350Z's.
I experienced a lot of headache from recalls and TSBs....along with a lot of other '03 Z owner friends that had to withstand tranny repairs, alignment issues with the front wheels, bad synchros, rear axle clicking, faulty power windows, etc....

I'm just saying....a lot of first year sports cars have it rough, which is why i always try to wait until the problems are ironed out.

But this feature seems like it has potential to be a nightmare if something goes wrong.

Am I alone in this?

Sorry, just trying to play devil's advocate here, folks.

[Lug]

Originally Posted by BoostedMKIV

I hate to rain on the parade, but is anyone else concerned that this synchro rev-matching feature will be the achilles heel of the 370Z in its first year?

I'm probably just being paranoid, cuz I bought one of the first 2003 350Z's.
I experienced a lot of headache from recalls and TSBs....along with a lot of other '03 Z owner friends that had to withstand tranny repairs, alignment issues with the front wheels, bad synchros, rear axle clicking, faulty power windows, etc....

I'm just saying....a lot of first year sports cars have it rough, which is why i always try to wait until the problems are ironed out.

But this feature seems like it has potential to be a nightmare if something goes wrong.

Am I alone in this?

Sorry, just trying to play devil's advocate here, folks.

As far as I know, the manual is the same as before with the sync rev match added (which can be turned off) and the 7AT has been feild tested already with the same power level or more in a heavier car. Hopefully the tire situation they went through on the initial 350Z would make them particularly sensitive in this area with added testing at least...

[shumby]

^^^ you can just turn it off? what problem are you talking about.

[Lug]

Originally Posted by shumby

^^^ you can just turn it off? what problem are you talking about.

You can turn off the rev matching the poster above me was worring about being a failure point. . The early problem I'm refering to was the tire wear problem on the first couple of years on the 350Zs. Lots and lots of complaints.