I have heard a lot of good things about JWT Flywheel and ACT. I am really close at making a decision but my Mechanic shared some info with me and I wanted to get input from guys who have this setup. I wanted to get the whole thing FW/Clutch/Pressure plate.

He stated that the lighter flywheel is nice because it rips thru the RPM however the heavier flywheel will feel a lot stronger and more torquey. He stated that the lighter the flywheel the less umph I will feel in the low end.

Discuss...

 

Bump!

 

The heavier FW will give you more inertia/torque and be smoother, thats simple geometry. Its your call. That "type" of inertia is of little value in a car the weight of the Z except smoothness of day to day driving.

I just installed a ceramic button clutch in a Ford 3000 diesel Tractor----that FW was 165 Lbs. It serves a purpose, it will pull a tree down.

OEM is a tad under 28 Lbs, the JWT is half that. Personally......I replaced it long before my clutch was worn. I didnt want that mass between engine and tires. I like it

 

Thanks for the response.

 

Here is my basic understanding of stock/heavy flywheels vs. lightweight flywheels.

The benefit of a lightweight flywheel is that you have less mass for the engine to spin before getting to the wheels. This equals more power to the wheels & faster acceleration.

The benefit of a heavier flywheel is that the mass of the flywheel helps keep the engine spinning between shifts. This means the RPM's don't drop as quickly as they do with a lightweight flywheel. Thus making shifts smoother.

 

The negastives to a lightweight flywheel are very minimal as opposed to the gains.
I have read on here that this is one of the better mods for our car, especially Forced induction cars..
I would do it, you will NOT be disappointed.

 

The only real problem on the Z is that because the stock flywheel is a dual-mass and all the lightweight replacements (that I've seen) are solid/single-piece, you will lose some refinement (increased NVH when engaging/slipping the clutch at launch and low RPMs). If the stocker were also a solid unit, there would be minimal detriment (you'd have to learn to either shift quicker or match revs on upshifts, not just downshifts).

It's the only thing keeping me from changing mine (that and I'm still not 100% confident that lightened flywheels for '03-'06 will work on my '07). On my last car, the lightened flywheel was easily the best straight-line performance mod I did (most bang for the buck). It is a totally awesome mod, performance-wise.

-Ed