I have done tons of searching. Someone even asked this exact question before but didn't get answer really.

I'm new to engine modding. I'm thinking about changing to the JWT flywheel but keeping my stock clutch (new '07 with 4K miles). Since I'm not planning on any significant hp increases, is there any reason I have to replace the clutch too? I know the argument that if you're already paying the labor to be down there, etc, but really doing the whole combo puts the project out of my price range. Only considering this since dealer offered me a deal to "help me out if I want to fix up my car" over a customer service issue. So if the labor or parts are greatly reduced as he's offering, then I figured I'd go for it. But if I have to do the clutch too, then I'll just forget it.

Thanks

 

That's a hard one. Since you are asking about a flywheel,i'm guessing you will drive aggressively with it. So your stock clutch over time can't take the abuse anyways so mine as well add something that can take that abuse. Since you are getting the labor reduce, i would try to match the flywheel with an aftermarket clutch. Its is true, since you are already in there, mine as well change it. It's still up to you though. iF you think about it, you can save in a couple of weeks and have the clutch easily.

 

Its also worth mentioning that the 07's have clutch issues and cant seem to handle the extra power the 07 puts down when driven aggressively. I remember some saying that the problem might simply be able to be solved by simply bleeding the clutch. I dont know what the updated consensus is on the whole issue, but I'm sure if you installed a JWT clutch you wouldnt have anything to worry about in the future.

I'd wait and save up the extra 200-300 bucks and do the clutch too, especially since you have an 07.

 

if i rememeber correctly the jwt like rps flywheel was designed to work with a stock 300tt z clutch design...after my rps went out i swapped it out for a oem 300z stock z clutch...

 

well the stock flywheel is a dual mass unit, and is heavy (28lbs) compared to the 13lbs of the jwt clutch. the only avantage i can see of keeping the stock flywheel is that with a heavier flywheel you get more torque...but a slower revving engine

 

You DO NOT want to use your stock clutch with a solid aftermaket flywheel...period. The stock flywheel is dual mass which means the outer ring and center sections are held together by a flexible elastomer. This absorbs initial shock load and vibration from engaging the clutch. The stock clutch has nothing to absorb these forces so if you mate it with a solid aftermarket flywheel you will have an incredibly noisy clutch and likely a short transmission life. Whenever you install a solid flywheel, it needs to be mated with a sprung-hub clutch (this absorbs the vibration that the dual-mass flywheel took care of). You can't get away with only half of the combo.

 

Um im pretty sure the stock clutch has springs in it too.

 

Nope, stock clutch disc is not a sprung-hub design. Here's a pic from Performance Nissan.

 

Here's a shot of JWT's sprung-hub clutch plate for comparison.

 

im running my rps flywheel with a stock 300 tt z clutch...there is no issues with doing that

 

Great info. Thanks!