Official Nissan 370Z Synchro Rev Match Transmission thread

[brisk]

seriously this synchro rev match transmission...is genius
with the option to turn it off/on too.

props to nissan and their engineering dept!

might see a new trend here with other manual cars..........

[SpOoNtYpE]

I really need to try this feature out when i test drive one.

[RDGR12]

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.

This is an awesome feature! I can teach my fiancee how to drive this car. She's totally against me getting it. Function and utility is probably not the best with this car, but man... just look at the performance numbers... and it's so SEXY!!

[Minicobra1]

I can tell you that it works perfect everytime and you can turn it off if you don't want it. The only frustrating thing is I find myself trying to heal and toe shift b/c it's what I'm use to doing in my older cars. I'm almost relcutant to use it because I don't want to loose my ability to heal and toe, but I have a feeling that most manual cars in the near future will have this feature since it works so well. It is far more accurate then I could ever be.

Braden

[wj4]

I wonder what will happen with the dreaded issue of money shifting aka mis shifting?

Once in a great while, you will hear a story of how someone wants to downshift from say, 5th gear down to 4th, but accidentally put it in 2nd gear, causing the car to over rev and damage the engine.

With the synchro feature, will it lock you out from going into the 2nd gear?

[AK370Z]

Originally Posted by wj4

I wonder what will happen with the dreaded issue of money shifting aka mis shifting?

Once in a great while, you will hear a story of how someone wants to downshift from say, 5th gear down to 4th, but accidentally put it in 2nd gear, causing the car to over rev and damage the engine.

With the synchro feature, will it lock you out from going into the 2nd gear?

That's the only problem. It will overrev and may damage the engine if you're not watching the tach but if you downshift to 2nd from 5th manually(without S mode) by accident , same damage will occur.

[mrmixitup]

Originally Posted by wj4

I wonder what will happen with the dreaded issue of money shifting aka mis shifting?

Once in a great while, you will hear a story of how someone wants to downshift from say, 5th gear down to 4th, but accidentally put it in 2nd gear, causing the car to over rev and damage the engine.

With the synchro feature, will it lock you out from going into the 2nd gear?

Synchrorev match does not prevent mis-shifting. If you over-rev, it won't help. Just make sure you pray to the car gods when that needle starts flying deep into that red zone.

[Philipp]

When lapping at the race track, I often hit the Rev-limiter will downshifting... Besides the "wheelhopping" effects, I do not understand why this will cause a blown engine???
Done this more than 300 times on my previous car without any engine issues... Is the Rev Matching disabling the engine cut-off sensors???

[mrmixitup]

Originally Posted by Philipp

When lapping at the race track, I often hit the Rev-limiter will downshifting... Besides the "wheelhopping" effects, I do not understand why this will cause a blown engine???
Done this more than 300 times on my previous car without any engine issues... Is the Rev Matching disabling the engine cut-off sensors???

Mmmm... Never heard of wheelhop while moving, but wheelhop from a standstill is by far more dangerous to your rear end then wheelhop from a roll. Traction control helps eliminate wheelhop as well as deflating the tires somewhat. If you don't want traction control on, I suggest solid rear bushings.

It's also wierd that you are red-lining while down shifting even with synchro-rev match. I don't know how to fix that other than telling you to downshift sooner.

[AutoX Z]

Originally Posted by Philipp

When lapping at the race track, I often hit the Rev-limiter will downshifting... Besides the "wheelhopping" effects, I do not understand why this will cause a blown engine???
Done this more than 300 times on my previous car without any engine issues... Is the Rev Matching disabling the engine cut-off sensors???

I think we're confusing down shifting with up shifting. 1-2 upshift, 2-1 downshift. Going from 2-1 it is possible to force the engine to over-rev because of the speed the wheels are turning. No amount of fuel cut will keep engine from exceeding the rev limit when there is a mechanical link to the wheels. That is a money shift and will definitely lead to major engine damage in some fashion.

[Philipp]

Originally Posted by AutoX Z

I think we're confusing down shifting with up shifting. 1-2 upshift, 2-1 downshift. Going from 2-1 it is possible to force the engine to over-rev because of the speed the wheels are turning. No amount of fuel cut will keep engine from exceeding the rev limit when there is a mechanical link to the wheels. That is a money shift and will definitely lead to major engine damage in some fashion.

AutoX
Sorry if i didn't translate properly my thinking... English isn't my first language.
Wheelhooping does occur under hard breaking when the rear of the car is going slower than the axle (due to brake compression on the wheels). It doesn't happen during acceleration...
Hope this clarify my comments. Also, hitting the rev-limiter is "NORMAL" when downshifting under braking before entering a tight corner/apex. This driving habit may also due to my rotary engine history where the power band was at high (very high) RPM levels.

[370Zsteve]

Originally Posted by AutoX Z

I think we're confusing down shifting with up shifting. 1-2 upshift, 2-1 downshift. Going from 2-1 it is possible to force the engine to over-rev because of the speed the wheels are turning. No amount of fuel cut will keep engine from exceeding the rev limit when there is a mechanical link to the wheels. That is a money shift and will definitely lead to major engine damage in some fashion.

Not with the rev-limiter it won't. The damage you risk is to the clutch and the transmission.

[badwolf42]

Does anyone have a picture of the switch and know how the switch physically works? When you depress the button, does it disconnect, or connect the circuit? When you aren't pressing the button, is the circuit complete or broken?

I'm considering buying one for my car, but I don't have or plan to have the rev match feature.

[PapoZalsa]

Originally Posted by badwolf42

Does anyone have a picture of the switch and know how the switch physically works? When you depress the button, does it disconnect, or connect the circuit? When you aren't pressing the button, is the circuit complete or broken?

I'm considering buying one for my car, but I don't have or plan to have the rev match feature.

[badwolf42]

Originally Posted by PapoZalsa

Dude, it's not for the feature and I don't care about it. I was looking for a switch that would look stock that I could use to connect to my video bypass on my radio. I swapped the radio from the stock, but all video inputs are disabled because you can't just ground out the terminal. It has to be pulsed. So I need a switch to pulse the terminal with. If I get the S switch, and it's graphic is stenciled on like the hazard light switch, I can get the stencil off or I can try to replace the head with the blank that's in there now so it looks no different than it does now, but with the ability to be pressed.
If the switch completes the circuit when pressed, it's useless to me. If it breaks the circuit when pressed, i can use it. That's what I was asking about in the first place.
So if you don't know, that's fine, but I was just trying to keep it looking kinda stock.