Originally Posted by Reverend Greg
(Post 1390120)
What is the difference in torque capacity between the sintered ceramic and these new carbon/Kevlar discs? What is the actual thickness of the discs?
Greg |
It's time?
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New heavier Street flywheel for Supermiata twin clutch
We have just added a new 12.8 lb Street flywheel option for our twin disc clutch. We still offer the 5.5 Race flywheel of course.
The intent of the heavier flywheel was to make it more streetable. More torque capacity than any single 9" (OEM 1.8) disc with a lighter pedal. The twin is a much heavier pedal than a stock clutch but still lighter than the high capacity 1.8 clutches on the market. As a test, we let the clutch out slowly in reverse up a slight incline, no throttle and the car would chug away on idle control without stalling. The 5.5 flywheel is very easy to stall in comparison. The other bonus is a huge reduction in NVH. The Race flywheel allows every buzz and rattle to enter your back teeth. It's a race clutch, no sugar coating it. The Street flywheel feels like a normal 1.8 clutch with light flywheel. Quite, not buzzy. The perk is that it will hold 400 lbs/ft and your SO can drive it. Simple choice between the two. The Street flywheel is still fast revving, holds torque, is quier and very driveable on the street. The Race flywheel sucks everywhere, makes your drivetrain sound broken except exiting pit lane, revs like a superbike and is godlike on track. https://supermiata.com/miata-twin-disc-clutch.aspx |
I am currently running an OS Giken TS twin plate. Any mods required to replace?
https://cimg1.ibsrv.net/gimg/www.mia...0af7ba6370.jpg https://cimg4.ibsrv.net/gimg/www.mia...c447d2cbea.jpg https://cimg5.ibsrv.net/gimg/www.mia...0deb917caf.jpg |
Originally Posted by Flow
(Post 1544331)
I am currently running an OS Giken TS twin plate. Any mods required to replace?
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emillio are you suggesting I shouldn't ask if any mods are needed to fit an SM twin plate based on the above existing install? Did you miss understand the question or are you suggesting that I should stick with the OS Giken setup? No real gains to be had to replace in your mind? Understood if so.
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He may have thought you were talking about the diff, not many people run the os giken clutch. What’s the total weight with flywheel? If it’s more than 14.6 lbs with flywheel, yeah there are gains to be had.
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I can't seem to find the weight anywhere TBH I would say it is heavier. It might also have a higher torque limit. Any thoughts on mods to the release system (photos above) to swap?
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Originally Posted by Flow
(Post 1544341)
emillio are you suggesting I shouldn't ask if any mods are needed to fit an SM twin plate based on the above existing install? Did you miss understand the question or are you suggesting that I should stick with the OS Giken setup? No real gains to be had to replace in your mind? Understood if so.
I'm dumb. Got a question for me, make it unambiguous so it is impossible to misinterpret. |
I very much doubt you are dumb emillio, busy maybe. It looks to me that your team have created possibly the best flywheel clutch kit currently available for these cars. Now the English language is the language of business and therefore impossible to make unambiguous! I see the following questions around longevity and support has been touched upon but not clearly answered as yet. I will endeavor to sate at least the questions clearly.
Thanks |
The puck lasts forever. If you have to replace yours you will be the first. The hybrid disc where rate is tied to usage. If you are doing autocross starts have a lot of power and grip it could wear within one year. For road racing and more sensible use it will probably last forever.
Everything is in regular stock. If we ever decide to stop making them you could get custom discs made. |
Thank you emillio, that spider web of a flywheel you guys have built looks just awesome. My car is way too driveable at the moment with the OGS twin plate...
Originally Posted by emilio700
(Post 1544384)
The puck lasts forever.
Everything is in regular stock. What has been the feedback on launch control and feel of metal ceramic vs carbon kevlar friction discs? Can you confirm you have both ceramic and kevlar discs available currently. Thanks |
We were actually involved a little bit in the development of the OS giken twin disc. Sean (at OS Giken) was trying to get down to our weight targets but could not come close. In the end I think it did was 21.5 lb compared to our 12.5 lb.
Call Ed on Monday for more info. |
Ed helped clarify the supply and spares availability, par for the course with small companies and specialist products by the sounds. Sean is on vacation at the moment. Looks like the OSG 184mm twin plate is 17lbs all up.
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Call Ed
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...Or send me an email.
Would be surprised if the OSG is actually 17lbs all up. The answer to question #2 is in #1 (14.6 pounds including carbon kevlar discs, as listed on the desktop version of our site). The previous posts citing 12 pounds for the full setup was for the single disc option which is no longer offered. Not enough space for springs on such tiny discs. Why do you want springs in a race clutch? |
For street cred duh?!?!?
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Originally Posted by turbofan
(Post 1544756)
Why do you want springs in a race clutch?
Stating the obvious I know but reliability and consistency is the motorsport holy grail in that to win you need to finish and the smarter we are on harmonics the more force we can apply to a system within setup constraints while maintaining the same reliability stance. Tuned springs/dampers in clutch plates are a known tool in solution kit for this. Out of interest, have you guys run a laser tach over the drive side of the Race clutch kit? |
Originally Posted by Flow
(Post 1544771)
Good question, I am working with a ME friend on this installation that consults to OEMs on torsional vibration analysis. Essentially we are looking to mitigate frequencies that gearbox resonances amplify from propagating through the power train.
Stating the obvious I know but reliability and consistency is the motorsport holy grail in that to win you need to finish and the smarter we are on harmonics the more force we can apply to a system within setup constraints while maintaining the same reliability stance. Tuned springs/dampers in clutch plates are a known tool in solution kit for this. Out of interest, have you guys run a laser tach over the drive side of the Race clutch kit? |
Originally Posted by emilio700
(Post 1544772)
My friend, you are way overthinking this.
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