I hate the dual mass flywheel and I am not a big fan of Aluminum so I sent a stocker dual mass ( they used the ring gear )to south bend clutch and they made me this steel unit . What you all think? sorry for the crappy cell pictures.

 

How much did it cost?

If it is less than $350, then this is what I will be getting.

 

What? Explain yourself. DMFs (besides being heavy) have quite a few advantages, and if weight is your issue, then why would go with steel? What's not to like about aluminum?

On first glance (given the limited info you provided), it seems you took a huge step backwards... what were you trying to accomplish?

 

It was 500+ shipping . Yes its lighter than a dual mass but i didn't weigh it so I cant say for sure how much.
I don't like the stocker for several reasons . Basically from what I have seen when it's clutch time you need to replace the dual mass. I am not willing to take a gamble and do a clutch job twice with trying to resurface the dmf.
I have no faith in the quality of the aluminum ones. Some people are confortable putting eBay performance parts on their cars I'm not one of these people. I don't want chatter ,also heard horror stories of them failing and what is the benefit ? You rev a bit faster? I would much rather have a flywheel that I know it HIGH quality, going last , and not going to leave me stranded because it blew into a million pieces.

 

First of all, you don't have to replace the dual mass at each clutch change. If you had researched, you would have found that Nissan now resurfaces them. Second of all, as far as resurfacing, at some point your solid mass will have to be resurfaced also. If a machine shop makes a mistake on resurfacing a dm they can also make a mistake on a solid flywheel. This is not a problem if you take it to a reputable shop that has experience.

Seriously?!?
Wow. The chatter is not from faulty material. It is derived from the fact that you have deleted the dampening characteristics of the clutch system. You may notice this a little less than the solid aluminum guys, but your setup will most likely still have chatter. Some guys have decreased the amount of chatter by installing a sprung disc instead of the solid one made for the vehicle.

Also, I'm sure others will chime in, but quality aluminum flywheels don't equal "eBay performance parts."

 

So not worth it... smmfh

 

I'll withhold judgment until I hear how well (or not) it works for you.

 

Yes it was 500 look and see what Nissan Wants for a dual mass... I am going to be running a sprung disk because I don't want the chatter. I didn't mean the chatter was from "faulty material" it's simply from the weight . IMO dual mass is pure crap an only there for comfort ...
When I was pricing out flywheels this was my cheapest option . If I have to replace my clutch again I pay 40 bucks to have it resurfaced. You may or may not be able to reuse the DMF . There is a reason not many shops will touch them let alone stand behind their work.

 

and
$375 from DaveB at Southpoint.


Good idea.

Weight isn't the only factor for chatter in the solid flywheel. See "spring disc" comment.

Fact>personal opinion. Dual mass flywheels were engineered for many advantages. One of the greatest is to increase the longevity of the drivetrain by dampening the loads from the engine.

I had my DM surfaced by an experienced shop for less than that.

This is true for any flywheel.
Perhaps I have had better luck because I live in a larger metropolitan area?


I'm acting as devil's advocate for the good of anyone searching to find information on this topic. It's good to know both sides of the story. Can you give all the details on the parts you're using? I believe this is the first time I have seen a 5.5 go this route. I'm curious to get reviews from you after install and further down the road.

 

Having actually done the calculation personally once or twice to find the critical vibration value for a drivetrain with a DMF vs. solid, I concur that the DMF is in fact better for durability and comfort. The value in this case referring to the "resonance" of the drivetrain... the DMF having approx. n_crit = 450 rpm vs. conventional with n_crit = 1800 rpm.

Secondly, yes, chatter comes from the lack of damping elements in a solid flywheel. This is mitigated by the elastic coupling in the DMF

Finally, the advantage of a lightweight flywheel are not simply an engine that revs faster. Looking into the reason for this reveals more pertinent information. In the engine, there are both gas and mass forces. The gas forces refer to the forces applied to (intake, compression, exhaust strokes) and extracted from (combustion stroke). The mass forces refer to the force required to accelerate components within the engine (pistons, rod, crankshaft). In order to find the net force, one must calculate the net force or sum of all these component forces. Force x radius = torque; torque x engine speed (rpm) = power. Similarly, the torque required to rotate a clutch (due to its moment of inertia) also factors into the net power to the wheels, just like rims do.

 

Nelledge to answer your question I plan on using a 350z clutch kit that I am having made up. The clamping force will be close to 400 ft lbs of torque.

 

that fly wheel brings back the memory's of the good ole days