Q for those that have driven the car for a while now with Synchro Rev

speedworks · 05-06-2009, 10:27 PM

Guys, trust me, it doesn't do it perfect, the surge is there on a downshift. I agree with ^ about maybe it was setup to accelerate once you downshift, because that is what it feels like. It is probably due to the heavy flywheel. In another thread, travis is putting a new lighter flywheel in, it will be interesting to see if it goes away. I can say this, it bothers me.

zilent_jay · 05-06-2009, 11:46 PM

Quote:

Originally Posted by speedworks

Guys, trust me, it doesn't do it perfect, the surge is there on a downshift. I agree with ^ about maybe it was setup to accelerate once you downshift, because that is what it feels like. It is probably due to the heavy flywheel. In another thread, travis is putting a new lighter flywheel in, it will be interesting to see if it goes away. I can say this, it bothers me.

If you read what I said, it makes the most sense out of anything anyone has said so far. I seriously doubt nissan set it up to accelerate directly upon downshifting, as many times you downshift through several gears, or don't need/want to accelereate right away.

Pushing_Tin · 05-07-2009, 01:56 AM

Quote:

Originally Posted by speedworks

Guys, trust me, it doesn't do it perfect, the surge is there on a downshift. I agree with ^ about maybe it was setup to accelerate once you downshift, because that is what it feels like. It is probably due to the heavy flywheel. In another thread, travis is putting a new lighter flywheel in, it will be interesting to see if it goes away. I can say this, it bothers me.

Mine works perfectly, and I have no complaints. Can you post a YouTube video so we can see it?

speedworks · 05-07-2009, 08:19 PM

No video capability, and you wouldn't be able to see it in a video. It is very small, and most people probably won't notice it. I am probably more anal than most on car feel, as I have conducted test driving with tire and auto companies, and have a good feel for a car - as well as have driven race cars for 15 years. My wife won't feel what I feel, as she will think it is just her method of downshifting. But, if you shift 100 times a day, like I do going to/from work, I can feel it. After a while it gets old, and doesn't seem normal - never have I driven a car that does this.

drisko · 05-07-2009, 08:24 PM

I actually have the opposite problem. The RevMatch usually puts my RPMs slightly below where they need to be. We're talking about 50-75RPMs or so, it is not too noticeable.

m4a1mustang · 05-08-2009, 01:02 PM

Quote:

Originally Posted by speedworks

Ok, I have driven the car for 4 months now, and have been able to really get used to driving with the Synchro Rev feature. One thing that I notice is that whenever I downshift (at every turn or stop), it feels like the rev match point is slightly higher then it should be, and I feel a slight surge forward when I do it, and can definately feel it during stops. Anyone else having this feeling? Now, I am very anal when I drive and have heel/toed for many, many years, on the street and on the track, but it just seems that when I use this feature (which is always), it doesn't shift and decelerate immediately, there is a split second that it feels like a lurch forward (very, very small, but noticeable). I also have tried to drive without it, and it is almost impossible to be smooth on downshift - you have to be perfect or it won't be smooth at all - I feel sorry for those that don't have this option. Let me know what you guys are feeling.

I've noticed that I have this happen every once in a while. Sometimes the SynchroRev doesn't seem like it's working 100% properly. Every now and then I'll get a rough downshift.

semtex · 05-08-2009, 05:28 PM

I wonder if upgrading to a lightweight flywheel would make things better (or even worse?).

05-08-2009, 05:28 PM	#22 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 53 Posts: 5,995 Drives: People to drink Rep Power: 32	I wonder if upgrading to a lightweight flywheel would make things better (or even worse?). __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

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05-06-2009, 10:27 PM	#16 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 17	Guys, trust me, it doesn't do it perfect, the surge is there on a downshift. I agree with ^ about maybe it was setup to accelerate once you downshift, because that is what it feels like. It is probably due to the heavy flywheel. In another thread, travis is putting a new lighter flywheel in, it will be interesting to see if it goes away. I can say this, it bothers me.

05-07-2009, 08:19 PM	#19 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 17	No video capability, and you wouldn't be able to see it in a video. It is very small, and most people probably won't notice it. I am probably more anal than most on car feel, as I have conducted test driving with tire and auto companies, and have a good feel for a car - as well as have driven race cars for 15 years. My wife won't feel what I feel, as she will think it is just her method of downshifting. But, if you shift 100 times a day, like I do going to/from work, I can feel it. After a while it gets old, and doesn't seem normal - never have I driven a car that does this.

05-07-2009, 08:24 PM	#20 (permalink)
drisko Base Member Join Date: Jan 2009 Location: So Cal Age: 43 Posts: 160 Drives: 09 370Z PW Tour S 6M Rep Power: 16	I actually have the opposite problem. The RevMatch usually puts my RPMs slightly below where they need to be. We're talking about 50-75RPMs or so, it is not too noticeable.