Synchro rev questions

Corporate666 · 06-21-2011, 12:09 PM

Hi guys,

I am looking at a 6MT car with the synchro rev. I had a few questions about it if someone who has it will fill me in

1) Does it rev-match on upshifts as well as downshifts? How does it know if you're going up or down? Like if you are cruising at 40mph and want to downshift to get more acceleration, or let's say you acceelerate to 40mph briskly, then let off the gas and cruise, then want to shift up a gear to drop the revs... how does it know what gear you will be going into?

2) Does it ever get it wrong? Like you are coming to a light so you push the clutch in, and it thinks you are going to upshift when you were actually going to downshift.

3) Is there any way to "cancel" it (without pushing the button)? I don't always shift linearly... I may pull out from a sidestreet, get on the gas hard in 1st and 2nd, but then want to just shift into 4th to cruise. If it's holding RPM's at (for example) 4000rpm waiting for me to shift into 3rd, how do I cancel that? If you release the clutch while the shifter is in neutral, does it cancel it? Or if you blip the gas, will it cancel the auto-rev? Is there any way to cancel it other than pushing the button (which obviously you wouldn't do every time you wanted to shift non-linearly)

cossie1600 · 06-21-2011, 12:15 PM

yes

no

its fine, dont worry much. it works fine

Rone · 06-21-2011, 12:22 PM

It looks and sounds like it rev matches on upshift, but it doesn't say anywhere whether it does or not . I think there is a sensor at each gate that lets it know when and how much to rev depending on current transmission speed.

kenchan · 06-21-2011, 12:31 PM

upshift or downshift the computer doesn't care. it just matches engine rev to drivetrain speed when lever enters gate.

so yes, the car does rev match on upshifts.

cossie1600 · 06-21-2011, 12:32 PM

it does. push your clutch in and get it ready for the upshift, you will see how rpm is kept high to prevent it from falling

Corporate666 · 06-21-2011, 12:50 PM

Quote:

Originally Posted by kenchan

upshift or downshift the computer doesn't care. it just matches engine rev to drivetrain speed when lever enters gate.

so yes, the car does rev match on upshifts.

Ahhh really? So it is detecting which gate you have entered to match revs? So if, for example, I did a 1-to-3 shift, it will match the revs for that?

If so, that is awesome and totally eliminates my concern

red6spd · 06-21-2011, 01:02 PM

Should be no concern. The system has been out since 2009 with no real problems. Plus if your getting SRM that means your getting the Sport package and we all know the sport package is the best option to get on the Z.

Roadster4Us · 06-21-2011, 01:09 PM

Yes it detects the gate before actually shifting into gear.

ClemsonWill · 06-21-2011, 01:32 PM

Quote:

Originally Posted by Roadster4Us

Yes it detects the gate before actually shifting into gear.

If you push the clutch in at speed. Then bump the different gates (without entering the gate) you will see the rpms try to adjust.

USMCASA · 06-21-2011, 02:31 PM

nissan has done your thinking for you, therefore just get it

onzedge · 06-21-2011, 02:31 PM

Quote:

Originally Posted by ClemsonWill

If you push the clutch in at speed. Then bump the different gates (without entering the gate) you will see the rpms try to adjust.

Quote:

Originally Posted by Roadster4Us

Yes it detects the gate before actually shifting into gear.

Quote:

Originally Posted by kenchan

upshift or downshift the computer doesn't care. it just matches engine rev to drivetrain speed when lever enters gate.

so yes, the car does rev match on upshifts.

All are correct.

Rone · 06-21-2011, 03:54 PM

I could be wrong (probably am), but it seems that the car maintains the revs for a moment while you are disengaging the clutch and selecting a higher gear. That's what it feels like to me.

ChrisSlicks · 06-21-2011, 03:55 PM

Quote:

Originally Posted by Rone

I could be wrong (probably am), but it seems that the car maintains the revs for a moment while you are disengaging the clutch and selecting a higher gear. That's what it feels like to me.

Yes, this was already mentioned. It has no idea if you're going to shift up or down initially so it just sets the revs in the middle ground until you pick a gear.

Drex · 06-21-2011, 04:51 PM

when you are coming to a stop and clutch in to go into neutral, it will blip the throttle as if you were downshifting. i had some ricer think i was revving at him at a light because of this.

ChrisSlicks · 06-21-2011, 04:53 PM

Quote:

Originally Posted by Drex

when you are coming to a stop and clutch in to go into neutral, it will blip the throttle as if you were downshifting. i had some ricer think i was revving at him at a light because of this.

Easy fix, just don't do that

Just leave it in gear until you are almost stopped and there is no issue.

06-21-2011, 12:09 PM	#1 (permalink)
Corporate666 Base Member Join Date: Jun 2011 Location: Boston Posts: 33 Drives: 02 BMW 3 Rep Power: 14	Synchro rev questions Hi guys, I am looking at a 6MT car with the synchro rev. I had a few questions about it if someone who has it will fill me in 1) Does it rev-match on upshifts as well as downshifts? How does it know if you're going up or down? Like if you are cruising at 40mph and want to downshift to get more acceleration, or let's say you acceelerate to 40mph briskly, then let off the gas and cruise, then want to shift up a gear to drop the revs... how does it know what gear you will be going into? 2) Does it ever get it wrong? Like you are coming to a light so you push the clutch in, and it thinks you are going to upshift when you were actually going to downshift. 3) Is there any way to "cancel" it (without pushing the button)? I don't always shift linearly... I may pull out from a sidestreet, get on the gas hard in 1st and 2nd, but then want to just shift into 4th to cruise. If it's holding RPM's at (for example) 4000rpm waiting for me to shift into 3rd, how do I cancel that? If you release the clutch while the shifter is in neutral, does it cancel it? Or if you blip the gas, will it cancel the auto-rev? Is there any way to cancel it other than pushing the button (which obviously you wouldn't do every time you wanted to shift non-linearly)

06-21-2011, 01:02 PM	#7 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	Should be no concern. The system has been out since 2009 with no real problems. Plus if your getting SRM that means your getting the Sport package and we all know the sport package is the best option to get on the Z. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

06-21-2011, 01:09 PM	#8 (permalink)
Roadster4Us A True Z Fanatic Join Date: May 2011 Location: Stafford, VA Posts: 1,328 Drives: 2013 ZL1 Rep Power: 16	Yes it detects the gate before actually shifting into gear. __________________ Greg 2013 Camaro ZL1

06-21-2011, 04:51 PM	#14 (permalink)
Drex Enthusiast Member Join Date: Apr 2011 Location: Maryland Posts: 498 Drives: '11 370z MB 6MT SP Rep Power: 14	when you are coming to a stop and clutch in to go into neutral, it will blip the throttle as if you were downshifting. i had some ricer think i was revving at him at a light because of this. __________________ 2011 Nissan 370z \| 6MT \| Magnetic Black \| Sport Package

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06-21-2011, 12:15 PM	#2 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	yes no its fine, dont worry much. it works fine

06-21-2011, 12:22 PM	#3 (permalink)
Rone Enthusiast Member Join Date: Jan 2011 Location: San Antonio, TX Posts: 326 Drives: PW Sport/Touring 6MT Rep Power: 14	It looks and sounds like it rev matches on upshift, but it doesn't say anywhere whether it does or not . I think there is a sensor at each gate that lets it know when and how much to rev depending on current transmission speed.

06-21-2011, 12:31 PM	#4 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	upshift or downshift the computer doesn't care. it just matches engine rev to drivetrain speed when lever enters gate. so yes, the car does rev match on upshifts.

06-21-2011, 12:32 PM	#5 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	it does. push your clutch in and get it ready for the upshift, you will see how rpm is kept high to prevent it from falling

06-21-2011, 02:31 PM	#10 (permalink)
USMCASA A True Z Fanatic Join Date: Nov 2009 Location: NC Posts: 1,152 Drives: 09 370z CY M6 Rep Power: 17	nissan has done your thinking for you, therefore just get it

06-21-2011, 03:54 PM	#12 (permalink)
Rone Enthusiast Member Join Date: Jan 2011 Location: San Antonio, TX Posts: 326 Drives: PW Sport/Touring 6MT Rep Power: 14	I could be wrong (probably am), but it seems that the car maintains the revs for a moment while you are disengaging the clutch and selecting a higher gear. That's what it feels like to me.