Saaboteur answered your last question, but he did not bother to address your idea that a heavier flywheel gives more torque because not only are you wrong, but it seems like you've got your mind set on being wrong too.

Go ahead and use a heavier flywheel, it's your car. If you think you have more experience than me, or know better than me, then don't bother with listening to me. I'm sorry I posted.

I used to go on a forum where I posted genuine, useful advice, but it was often ignored by the people needed it the most. It got to the point where I stopped posting anything useful and instead posted garbage because it made no difference. I'd rather not repeat that on s2ki, so I'll stop posting about this topic. Good luck on your project. 300+ wtq is a good goal.

 

I have seen many disks and pressure plates from SPEC fail. From personal experience I have had no isses with ACT, Exedy or OS Giken

 

^^ Are those experiences with your car?

Exedy wont handle more then 300 ft lbs.

ACT may be a better option - Ive just done some reveiw checks on the SPEC and they were all good. Now I have contradicting opinions.......

"Saaboteur answered your last question, but he did not bother to address your idea that a heavier flywheel gives more torque because not only are you wrong, but it seems like you've got your mind set on being wrong too."

So you are saying that the same car, same set up, same dyno, same conditons........that the Dyno numbers will read in favor of the lighter flywheel in terms of peak TQ? I'll say it again...heavier flywheel does not make the ENGINE produce more torque....but it will get more of that TQ the engine makes TO THE GROUND then the lighter flywheel does.

Im not questioning who you are or what you know - sounds like your doing that to me though?? Also sounds like your bragging of your experience and that nobody knows better then you.......just saying what I instantly thought from reading your msg.

I will openly admit - I dont know tons or everything about clutch set ups and I am more then open to constructive advice, but when it comes across as arrogant - I may choose to ignore it.

Ultimately - I'm hoping to acheive 450 - 475 whp, which I am HOPING to get 300 - 325 tq. May be a stretch but im hoping.

Im trying to nail down the best clutch / flywheel set up that can not only handle that power, but is most streetable as well.......

this is where I say I am open to any advice and opinons ??

 

Most streetable but capable set up would be stock flywheel with an uprate pressure plate and mildly aggressive friction disc. I'd be sure the friction disc is a full diameter one, NOT 3, 4 or 6 puck race style. Those are difficult to drive smoothly and wear out quickly - and actually, you wear them out quickly because you are trying to drive the car smoothly!

As for brand names, my only experience with aftermarket clutches has been on my Saab. I eventually went with stock pressure plate, combined with the lightweight aluminum flywheel, and a custom disc from Bully Clutch in Ottawa. The disc kept an organic compound with metallic content, some sort of carbon kevlar mix if I remember right...I had one side more aggressive than the other - so the one side gripped nicely and didn't slip, but the other side was able to be driven smoothly. BUT...changing the clutch out on my Saab is about a 2 hour affair at the most, I think I could have it out in about 30 minutes. Swapping clutches and flywheels on an S2000 (or just about any other car) is much more of a pain, requiring transmission removal and all that. Good motivation to find the right combination first out. I have to admit I raised an eyebrow when you mentioned swapping out flywheels to do dyno testing...expensive proposition in time!

 

^^Ya, the only problem is finding a disc clutch kit that is capable of handling over 300 ft lbs.

I'm definitely determined to find the right option first off and have no worries.

 

Once again, it's your car, and you can do what you want with it. If you think a heavier flywheel is the way to go, then do it up. If you think a heavier flywheel will somehow decrease the amount of torque lost in the drivetrain, then do it up.

Don't worry about that "arrogant" guy who says otherwise. And honestly, if you hit your power goals, it won't even make a difference.

 

I re-read my last post, and thought about it some more. Even though I said the most streetable would be the stock flywheel, I didn't add that I'd do a lightweight flywheel anyway - just for the throttle response. Weight is the enemy of just about everything performance related on a car. My inclination is to think that for over 250hp/L on 2.0L or 2.2L of displacement will require a massive turbo. You ever see the dyno charts on 800-1000hp Supras? Big power, but big lag.

Even with dual ball bearing designs, it's gonna be relatively laggy. Have variable geometry turbos made it to the aftermarket, or are they confined to OE applications still? I think that variable geometry turbos are about the only way you can get huge power without huge lag.

I guess I'm saying you should get a lightweight flywheel. I don't think you will notice a huge difference (>30 ft lbs) in torque between the stock or lightweight flywheel, either through the butt dyno or an actual dyno. But you will notice a huge difference in the feel and responsiveness of the engine. But this is all just conjecture and maybe a bit early to say.

 

^^^ Mase's kit has been designed for maximum power and quick spooling.

If you havent already, check his kit out - should be in my posession before the end of the month hopefully.

 

I ran the ACT HD-SS with a Toda flywheel and LOVED that setup, really made the S2000 that much more enjoyable IMO.

 

For your question I am using Exedy on my S2000, and just as Jonanator has mentioned I have ran the setup he has had on another car I had. SPEC has failed for many different applications I have seen my customers use s13, mustang, civic I could go on. ACT would be the best bang for the buck. They offer 4 and 6 puck sprung disks as well