I am going to have the dealer check it out tomorrow, but I have been noticing that the tach pulsates at idle, and thoughout the rpms. I suspect the Nismo flywheel has worn unevenly, and is not balanced, causing the tach needle to fluctuate a bit.

I have a feeling the flywheel will be out of warranty now, so I will probably just have to deal with it until the clutch wears out. It still drives smoothly, but you can see the movement with the tach as it idles and as you accelerate.

Anyone else have this experience?!

 

I have JWT flywheel and it does that time to time.
The car drives normal tho.

 

How can you tell if a used car your looking at has a lightweight flywheel?

 

The feeling in the seat of ur pants

 

Seriously, how can I verify if an aftermarket flywheel has been installed? This 350z also has 19" wheels on it, so the butt dyno will be thrown off a little.

Could I have the service department verify? Is there anywhere to look without taking apart anything if I were able to get it up on a lift?

 

No

 

I am serious ---U can I suppose pull the starter out and look at the back side of the flywheel, or as I say just drive it and see if it feels like u lost 15 LBs of dead weight on the a$$ end of ur Crank

 

you hear alot of clunking around if it is an aftermarket flywheel...

it sounds more like you have sensor issue, or the idle just needs to be reset...

 

agree completely! I've never seen a flywheel balance problem from face wear, even on severely discolored and disfigured ones with "deep fried" racing clutches.

I had one aluminum flywheel break on me, and that will cause a balance problem if a chunk comes off -but this is highly unikely on a late model Z.

 

The dealership said it was caused by the Nismo flywheel. They can wear out of balance, especially since they are thinner, compared to the thicker factory unit.

If you have a lightweight flywheel, especially a Nismo, you'll know it from the sound it makes, and how much quicker the car moves up through the rpms, compared to a car which has the stock flywheel. It sounds like a cement mixer while it idles in neutral. Stock, it was quiet.

 

#1 - The NISMO Flywheel is the same overall dimensions of the factory unit
#2 - It is better ballanced then the factory unit since it is a solid piece not a two piece floating damper type...

I had flywheels as light as 8lbs in my Z and it never did that...

what is your idle set at? if it is below 800 it will do that... (move a little)

Does it jump like 500 RPM? how much does it move around?

 

.

 

About 200 rpms at times, even going up through the rpms. It is the flywheel. The dealer confirmed it.

 

Find out what your base idle is set at...

it sounds like your idle is set too low...

If you have a 04.5 or up... you may need to put together an idle stabilizer kit...

If you have installed an intake, make sure the crank case blow by hose on the intake tube is not kinked...

Light weight flywheels make the motor more sensitive to alot of things... including idle...

 

No. They have been pretty good to me at Sutherlin.

 

My idle sits at about 800 rpms.

 

I dont think there is a problem to worry about...

thats my opinion...