Many Audi guys with built engine big turbo apps (GT3071) have run Spec and they all had problems and in fact I have never heard of anyone not having a problem with SPEC clutches. Not sure if the problem carries over to the 350z but if the Audi SPEC clutch is even half true about problems I would avoid them like the plague.

 

Then what i read must have been 450 at the wheels. For the average guy that is only looking for 400-450 whp/trq, that seems pretty good, when you also take into consideration its price.
By the way, i got my info from mynismo.com

 

Taurran, it might be worth a call to Clutchmasters to ask them about this. IMHO, no organic clutch is going to hold 700ft/lbs of flywheel trq.

 

Unless you get one with a pressure plate that requires the foot of god to push it in.....

 

Yup, I heard those pressure plates come with a few anabolic steriod injections for your left thigh.

 

I walk around in circles already....left leg larger than right...sighss...haha j/k

 

Yeah, I've pretty much come to that conclusion as well. Such is the reason for this thread asking for the truth from these people with all the wild claims of 600+whp with no slip on JWT setups.

And, as you just read from Z1, any organic clutch that will hold that power is clearly not streetable.

When I was originally looking around for a clutch, I was told that the RPS 6-puck combo was underrated and could hold close to 700ft/lbs. Seeing Jeremy's car tear one up and slip totally past 470whp cured me of that belief real quick...

 

I will be going with Clutchmasters or ACT

 

Again my question the clutchmaster FX600 or FX700 Twin organinc, hhow do they rate clamping wise?

 

Sharif, mine is rated at 700lb/ft with my RPS Max Series sprung 6-puck. I guess it isn't completely organic, but I hear RPS underrates their holding power. I don't anticipate replacing this clutch.

 

Yeah, that's the clutch I was referring to in the original post. It would be perfect at your power levels, but I'm not sure how it would hold at 550-600whp, especially on a ST setup putting down serious torque...

 

We still know exactly which clutch Jeremy was refering to. The RPS 6 puck with heavy max pressure plate is a beast, and I really dont see it failing at 470whp.

The CM twin plates are designed strictly for drag racing, according to CM, and they can "easily" hold 800ft/lbs, according to CM.

 

Yeah. Thing is I talked to the previous owner of the motor/tranny that Jeremy swapped with about 5-6 months ago, and he lead me to believe he had the Max series pressure plate. He informed me it should be good to 700ft/lbs. Perhaps it was just burned out from heavy use or improper break-in.

 

According to Clutchmasters the FX600 is streetable and the FX700 is Track only alot of copper in it and it grabs hard and quuick.
FX600 = Bonded Organic Kevlar mix for the street
FX700 = Compressed Ceramic Bronze for the strip

http://www.importperformanceparts.ne...twindiscs.html

Cool over 800ft/lbs at the crank,sounds good; way more than I need. Cheaper than the twin or tripple carbon and holds the power.

 

I have a clutchmasters with ceramic lining and a jwt flywheel. I drive my car daily, is a little difficult to get used too, but its a pretty strong clutch. They dont show it on the website you have to call them and request it, and the price for it is unbeatable.

 

Nice. I wonder how the pedal feel and engagement compares to the carbon clutches. It's a $500 difference between that and the twin disc carbon, which is substantial but really not much in the grand scheme of things. I'd like to hear more practical feedback on the x600.

 

Oh - Sharif, I PM'd you... just making sure you got it.

 

I am running a 2+ on my setup right now. I am pushing the limit of the clutch - rated at 525 btq. I had a pressure plate issue and spec replaced the entire flywheel, clutch/pp setup with basically no hassle. After driving my car, 3 locals to me are now running a spec in their cars - 477 awhp STI running a 3+, 301 fwhp mazdaspeed protege running 3+, and Blake 406 whp APS ST 350Z running the 2+.

I really like the feel of the clutch. The pedal is fairly light and the engagement point is in the stock location, unlike the JWT which drops right to the floor. The engagment of the clutch is a bit quick and slipping the clutch for a smooth start takes about 1/2 dozen times to get the hang of. If the clutch shows to have some longevity it is a real winner- being a hybrid carbon-kevlar makeup, it should have some longevity.

I would choose a spec setup over a clutchmaster, though clutchmaster is a somewhat overlooked brand, much like Spec.

I am looking for a bit more power and will push the spec 2+ to beyond 500 wtq and run it till it fails. At that time, I 'may' go with an ATS setup, but will definitely chat with the fellas at spec about their 3+ when the time comes

Oh, and the spec flywheel, well it is a JWT/fidanza flywheel. Says JWT on it

 

This guy has a Clutchmasters FX700 for sale for $1000. If I didn't already have my FX600, I would snap it up. FYI, I am very happy with my FX600; it is smoother than I expected.

https://my350z.com/forum/drivetrain/...lex-plate.html

See my post in that thread, maybe you can exchange the FX700 plates for the FX600 plates, which are supposed to be more streetable. It is my understanding that the clutch plates are the only difference between the FX600 and the FX700... At any rate, $1000 for a FX700 that has never been used is a very good deal...

 

So the consensus is that if you are going 500WHP or higher you probably should not go with the JWT clutch?