Has anyone with an aftermarket lightened flywheel had problems with vibration due to harmonics or with a herky-jerky ride as a result of having less of a flywheel effect to smooth things out? Do you think the mod is worth the expense in terms of improved driving feel? I'm considering this for the future, but wouldn't want to cause mechanical problems to the engine as a result of loss of harmonic damping from a heavier flywheel.

 

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I've got nearly 22k on mine and all is well..

 

I have the JWT combo and it took about 700 miles before the jerkyness stopped. It does make some nasty sounds but I can't really hear it over the Vortech.

 

+1 and Paul, it's great for road racing.

 

I can hear mine at idle when the clutch is depressed and also on 1st gear take off. You hear a sound similar to gears grinding a little bit. Not a graceful sound at all.

 

IMO I don't think a lightened flywheel is a worthy mod. I spent 400 bucks on my flywheel and didn't really get any added power. It revs like a deamon but it won't really do much else.

 

Thanks for the info. As I understand it, the mod isn't supposed to increase horsepower but rather make the car accelerate as if it's lighter--every pound off the flywheel translates into some much larger number as a curb weight equivalent. Just curious--what brand flywheel did you install?

 

Several people in TX have had problems with the aftermarket flywheel bolts backing out and ruining the clutch, flywheel and pressure plate. The speculation was that the chatter/vibration makes the bolts wiggle out if they're not properly torqued down. Make sure to torque the flywheel bolts as recommended, wait 20 minutes and then retorque them accordingly.

Some people even recommend using blue loctite to keep the bolts from backing out.

Other than that, it's a fun mod and it did not change my 1/4 mile time at all. It added 0.1 second to my 60' time (cuz I suck) but the ET was identical. Bracket Racing... here I come.

 

It is a great mod if you are going to be tracking the car. Otherwise, unless you do some spirited driving on twisty roads with performance shifting up and down....spend the money someplace else.

 

...for about 2k miles I felt a huge difference, but now its just eeh. maybe I just got used to it.

Its cheaper than the stock parts if you go with the JWT setup. So if nothing else that's a decent reason to go with the mod when it comes time for a new clutch.

 

Mine is a Fidanza...

 

several people in TX? It's state specific? =)

 

Nope, it's Performance Nissan Specific.

I guess I meant CA and not TX huh?

 

Aw, I see. Well, mine was installed my Perf Nissan b4 I moved here...no problems so far...8500 miles