Did a search, not too many have them installed.

Is power increase worth it? How much louder is it and is it a good sound? Dealership is going to install a new transmission so I'm thinking about throwing the NISMO flywheel in at the same time.

 

If I remember correctly, Jeff@Performance Nissan installed one and have a pretty solid review.

 

I had one out in under the same circumstances. Revs faster, goes faster....noise on the bottom end is wierd as hell, sounds gravelly like a truck. I did not like it at first but have gotten used to it. If I had the chance to swap it back out for the original I would stay with it, even with the sound. It is just too much fun!

 

uhh...i wasn't aware flywheels made a sound....

 

Uhhh they do. As a byproduct of what they are.

 

So is the flywheel noise only up to 2500 rpm? I've also heard that if you adjust your idle speed the noise goes away significantly. Have you guys tried that?

 

The flyweel that is stock in the Z is a dual mass flywheel. It has rubber in it to reduce the sound of the flywheel.

The NISMO / JWT / TILTON are all a single mass light weight flywheel.

Nismo around 26lb's
JWT around 14lbs
Tilton - 8lb's but requires a new 7.25" clutch.

The NISMO FLywheel can be used with the stock clutch, or the NISMO Clutch which is installed in Jeff's Z. The clutch grabs hard and is very solid. The clutch actually feels better then the stock clutch, not as hard. The Nismo flywheel revs faster. It gives you a slight "cement mixer" sound.

The JWT is 14lbs and can be used with the stock clutch or Nismo clutch. The JWT is lighter, More Noise, Much faster reving and greater engine brakeing.

The TILTON is only 8lb's and rev's faster then you can even think. You have to rev before you even thought of shifting with the stock flywheel. The TILTON requires a 7.25" clutch, Currently we only have a Rally / Race or Carbon clutch available. We do NOT recomend these for street use. Especially if you are in stop and go traffic. We will how ever have a STREET CLUTCH avaialbe in the next week or so! This clutch will be unstopable.

What will a lighter flywheel do for you?

On short, it will reduce the amount of drivetrain loss relized from the stock flywheel. That means, more power to the rear wheels. Here is a write up on Moment of Inertia from TILTON.

The MOI Difference

The flywheel by literal definition is an energy storage device. It takes energy to spin the flywheel and clutch up to speed. If it is heavier or larger in diameter it takes even more energy to spin up to speed. This energy comes from the engine in the form of horsepower. Every horsepower that it uses to rotationally accelerate the flywheel and clutch assembly is a horsepower that does not make its way to the rear wheels to accelerate the car when on the throttle.

The rotating energy in the flywheel and clutch does not disappear. As we said before the flywheel is an energy storage device. It releases the stored energy when you are on the breaks. Just when you are trying to slow the car down that energy is pumped back into the drivetrain trying to push the car forward. Therefore, you have to work the breaks a little harder. Reducing the MOI (mass moment of inertia) of the flywheel and the clutch that rotates with it can increase the car's acceleration and aid in braking.

Determining the MOI of a part takes a special measuring device that is not found in the average race shop. Weight is a factor in determining the MOI. But, how far the weight is located from the axis of rotation is even more important and often overlooked. The MOI rating, usually measured in lb-in^2, is a figure that accounts for the weight and the location of that weight. When comparing two different components the one that has the lower MOI is the one that robs the least amount of horsepower during acceleration. So, when comparing two different parts one should ask what the MOI is, not the weight.

Doubling the weight of an object without changing how far the weight (technically mass) is from the axis of rotation doubles the MOI, which follows common sense. Doubling how far the weight is from the axis of rotation quadruples the MOI, which is not as intuitive and demands a closer look. Since it is twice as far out it must be bought up to twice the linear speed to reach the same RPM. To do that in the same amount of time requires twice (2) the linear acceleration. And, being twice as far away from the axis of rotation we lose half of our leverage and it takes twice (2) as much torque to reach even the same linear acceleration. Accounting for needing twice the acceleration and twice the torque we see that 2 x 2 = 4 times the horsepower robbing effect or MOI. Likewise, moving the weight to three times as far from the axis of rotation multiplies the MOI nine times!

How large of an effect the diameter has is shown by the fact that the MOI of a 168 tooth Chevrolet flexplate is more than that of a good small block Chevrolet racing crankshaft. Yet, look at the difference in weight!

It is the combined MOI of the clutch and flywheel together that matters. When comparing look at the whole package. Looking at the clutch alone does not reveal the entire situation. And, remember that diamater has a much larger effect than weight.

Work by Tilton Engineering, Inc. to reduce the MOI on the Dodge Viper clutch and flywheel assembly allows an increase of 30 horsepower at the rear wheels without a single internal modification or additional stresses on the engine. This is how you find reliable horsepower.

Michael O'Neil
Managing Engineer
Tilton Engineering, Inc.

 

if you hold down the clutch pedal then you dont get the noise.

 

Yes my noise goes away around 2800 RPMs. And the sound is not there with the pedal in as mentioned.

 

Oh yes,

I forgot to mention.

We now stock JWT Flywheels and Intakes! We can also get JWT products at the every day low Performance Nissan Prices!

PM me for info, Will have them added to the site at some point next week.

 

By The Way, MR Potato Head. Your Z looks great! I have a silver stone as well. Best color IMHO. I went with reflective tint though...

More cosmetic mods very soon.. Nismo Wheels (powdercoating) and springs etc etc... Nismo body kit when it comes out. (Mid Dec is what we are being told)

 

Hey thanks! I went with the nonreflective tint because it comes in 20% and the reflective didn't. Its cool though because they look great either way!

 

thats funny, thats exactly why i'm getting my trans replaced. currently my car is doing the same thing stock. when I have the clutch pushed in it is quiet. when it is out, it is really loud. the dealership even pointed it out to me without me telling them and they wanted to replace it. so I guess I can live with the flywheel sound if my trans is loud right now. thanks guys.

 

Bah, I cant remember the exact name of the part that makes that noise for some reason. (long week maybe). But chances are your tranny needs replacing any way. Are you putting in a new Flywheel at the same time?

Should be much cheeper labor for the install.

 

Well I like how yours looks a little better then mine with the black tints to be honest. I have 20% in the rear and 30% in the front.. odd..

You can have your black windows Because I'm powdercoating my nismo wheels Black hehe

 

Late entry here..but I have been away on a business trip.

Same experience as potato head...

I love the NISMO flywheel... great for everyday driving. Upshifting... the revs hold... which is a great plus. Also, the overall shifting is a lot smoother because of the lighter flywheel.

I definitely recommend this addition... the NISMO flywheel is not radical -- it makes the shifting process much smoother than stock.

Summary: It is an excellent addition for those who, like me, use the Z as an everyday driver -- but like to punch it during weekends.

Color me...

 

I have a question, I know about the marble like noise at low speed in 1st or 2nd and I am used to it, but recently I have noticed when driving hard in between shifting I feel a vibration through the clutch pedal when all the way in, I guess it is when I have not let go of the gas quick enough when I press the clutch, sometimes I even hear a noise to go along witht he vibration.

I comfirmed the vibration by revving the engine with the clutch all the way in while standing still. I don't mind it if it is normal just want to make sure there is something that got screwed up during the reassembly of the clutch/flywheel.

 

I have the Nismo flywheel/clutch also. When you replace the stock, dampened flywheel with any other flywheel that has no dampening you will feel and hear the vibrations in the pedal, shifter and through chassis. That’s what the dampened flywheel was for in the first place, to keep housewives from bitching about the vibration.

 

!slap!

 

What are most of you using for a clutch to go along with the nismo flywheel? stock? I had really good luck with my "clutch masters" (stage III) in my SS camaro, and they now make one for the 350z/g35! I was thinking about taking my 'G' to the dealer to look at why my car has so much clutch chatter, specifically first gear. I have a feeling they are going to say it's "normal". Typically, you get more clutch chatter with aftermarket clutches/flyhwheels, but the Clutch Master is amazing in my camaro! Gripped a lot better than stock............and no clutch chatter!!! Hopefully the one for the Z/G is just as good becuase when this clutch goes out, I'm getting a clutch master clutch.

Stage III
http://www.clutchmasters.com/shop/?p...000&AppID=5195

Stage II
http://www.clutchmasters.com/shop/?p...000&AppID=5191

Stage I
http://www.clutchmasters.com/shop/?p...000&AppID=5184

Stage IV !!!
http://www.clutchmasters.com/shop/?p...000&AppID=5202

I have the stage III, I'm hoping I'll have the same luck with the stage III for my g35. But I don't see a flywheel listed yet by clutch master. I'll probably try the nismo flywheel with the setup. By the way, how much do you charge for install(performance nissan)?