Nissan 370Z Forum - View Single Post - Lightweight flywheels and SyncroRev Match

MoulaZ · 01-22-2014, 08:59 AM

Have used the JWT 16lb Flywheel, and the Southbend DXD Race 19lb Flywheel. Currently still have the latter installed.

If anything, I'd say Synchro-Rev performance actually improved, the most with the JWT. It was easier to trick with the Stock Flywheel. And it's actually easier now to bounce between gears, up or down with the lighter Flywheel. The VQ37VHR itself is incredibly responsive and 'zippy', but just due to it's high level of NVH, Nissan chose to just dampen the heeeell out of it with a 32lb Dual-Mass Flywheel.

Downside to going Single-Mass Flywheels though still exist, the horrible chatter at idle in neutral (can largely be combated with thicker Gearbox Oil, and the reason I swapped out from the JWT to the DXD), slight rattle on standstill take-off (you'll learn to very slightly adjust how you take-off), and difficulty taking off uphill without adding to Clutch-riding.

JWT Install, when I first drove it home and first learned of this 'cement mixer' noise:
370Z Gearbox/Transmission Rattle Noise - YouTube

Still on JWT at this point, but I learned that thicker Gearbox Oil could help. I went with full Redline MT-90 and got this:
370Z Gearbox/Transmission Rattle Noise Improvement (Cold Start) - YouTube
However, be warned, thicker Oil does take a toll on shifting ability. Expect to use significantly more force to select gears for a couple of minutes on cold starts.

MoulaZ

01-22-2014, 08:59 AM	#15 (permalink)
MoulaZ Base Member Join Date: Jun 2013 Location: Sydney, Australia Posts: 230 Drives: '09 Z34 BP Turbo V2 Rep Power: 25	Have used the JWT 16lb Flywheel, and the Southbend DXD Race 19lb Flywheel. Currently still have the latter installed. If anything, I'd say Synchro-Rev performance actually improved, the most with the JWT. It was easier to trick with the Stock Flywheel. And it's actually easier now to bounce between gears, up or down with the lighter Flywheel. The VQ37VHR itself is incredibly responsive and 'zippy', but just due to it's high level of NVH, Nissan chose to just dampen the heeeell out of it with a 32lb Dual-Mass Flywheel. Downside to going Single-Mass Flywheels though still exist, the horrible chatter at idle in neutral (can largely be combated with thicker Gearbox Oil, and the reason I swapped out from the JWT to the DXD), slight rattle on standstill take-off (you'll learn to very slightly adjust how you take-off), and difficulty taking off uphill without adding to Clutch-riding. JWT Install, when I first drove it home and first learned of this 'cement mixer' noise: 370Z Gearbox/Transmission Rattle Noise - YouTube Still on JWT at this point, but I learned that thicker Gearbox Oil could help. I went with full Redline MT-90 and got this: 370Z Gearbox/Transmission Rattle Noise Improvement (Cold Start) - YouTube However, be warned, thicker Oil does take a toll on shifting ability. Expect to use significantly more force to select gears for a couple of minutes on cold starts. MoulaZ Last edited by MoulaZ; 01-22-2014 at 09:04 AM.