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twin disk questions...

 
Old 04-18-2016, 10:23 PM
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IMO the only issue with the twin disc is the very small engagement range. This is an unavoidable problem because it is plug and play. The only way around it is a trick hydraulic TOB or different clutch fork setups. I've been toying with the idea of trying it because that's the only thing that bothers me on the street.
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Old 04-19-2016, 05:26 PM
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Old 04-19-2016, 05:35 PM
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One could move the fulcrum of the fork towards the shaft centerline increasing the leverage ratio, effectively increasing engagement range. FWIW, we have not given up on organic or hybrid discs for the twin. We are working on a possible solution now.
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Old 04-19-2016, 06:10 PM
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Originally Posted by emilio700 View Post
FWIW, we have not given up on organic or hybrid discs for the twin. We are working on a possible solution now.


I will buy a set as soon as they are available. I want a spare set so I can swap them out instead of having the car down for a week.
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Old 04-20-2016, 09:36 AM
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Tilton's method of changing the ratio was to create two different pressure plate floater disks. The ring on which the pressure plate spring fingers pushed was moved radially inward or outward depending on the need for travel or clamping force.

What you have to be careful with is overstroking the springs because they can and do crack. Better to trade a little clamping force than risk a busted pressure plate diaphragm spring.
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Old 04-20-2016, 12:16 PM
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What about extending the clutch fork and spacing out the slave cylinder. Not sure how much room there is down there but you could theoretically add some travel that way.
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Old 04-20-2016, 01:22 PM
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Originally Posted by aidandj View Post
What about extending the clutch fork and spacing out the slave cylinder. Not sure how much room there is down there but you could theoretically add some travel that way.
That would have the same effect. I just get used to the short pedal travel and prefer it that way. Faster shifts. One trick is what I call a "heel plant". Instead of modulating clutch with your calf by raising your entire leg, you plant your heel on the floor and modulate with your ankle like you do with the throttle. Problem with leg method is when the car starts to move, your leg stays put, releasing pressure, further engaging clutch and.. stall. By planting heel your foot stays put relative to the pedal when the car jerks forward. You quickly get used to it and can actually modulate comfortably while car is shooting forward. Only works with short pedal travel. Heel plant won't work with OEM style long pedal stroke.
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Old 04-20-2016, 01:30 PM
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Originally Posted by emilio700 View Post
That would have the same effect. I just get used to the short pedal travel and prefer it that way. Faster shifts. One trick is what I call a "heel plant". Instead of modulating clutch with your calf by raising your entire leg, you plant your heel on the floor and modulate with your ankle like you do with the throttle. Problem with leg method is when the car starts to move, your leg stays put, releasing pressure, further engaging clutch and.. stall. By planting heel your foot stays put relative to the pedal when the car jerks forward. You quickly get used to it and can actually modulate comfortably while car is shooting forward. Only works with short pedal travel. Heel plant won't work with OEM style long pedal stroke.
Yep, i've read all your comments about that. Its very helpful. And i love the short travel on the track its freaking amazing. But this is really a street car over a track car. Thats my only issue. I have started to get used to it though. Definitely a learning curve. I'm also wearing boots 90% of the time. And you don't get the best modulation in those haha.
My gf drove it last night for the first time and didn't stall it once.
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Old 04-21-2016, 01:41 AM
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I've been dailying the ceramic twin disk (8-5 job to go to, M-F in a major metro area, ~90 miles a day through downtown), and I've gotten pretty happy with it. It's perfectly possible to modulate smoothly from a start, just difficult.

Incredible fun, as well. Shifts without delay, makes rev matching downshifts absolutely wonderful.

...interested in future organic disks still. :P
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Old 01-21-2017, 01:08 PM
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What is the status of the new organic disks?
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Old 01-21-2017, 02:06 PM
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Old 01-21-2017, 02:10 PM
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The website will show "in stock" and you will be able to add to cart when we have them. No ETA. Just check the site once a week or so. We won't update every thread on every forum worldwide about our twin.
Easiest to bookmark the product page on our site.

Replacement Discs for SuperMiata 7.25" Race Clutch
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Old 01-21-2017, 04:15 PM
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I'm more after a complete clutch with disks and have been keeping an eye on your site.
late last month you said 4 weeks, now it's no ETA again....
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Old 01-21-2017, 05:27 PM
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The twin ceramic has been in stock. Waiting on the first batch of Kevlar/Carbon discs. There will be no organics again for the twin.
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Old 01-21-2017, 05:30 PM
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Production Kevlar/carbon? Or another prototype. If production is there any info on longetivity or torque capacity vs ceramic?
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Old 01-21-2017, 06:19 PM
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"Full disclosure, we found a new source for the much-loved organic discs and put them back into production. We should have them in stock within the next four weeks or so."

So this is not accurate?
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Old 01-21-2017, 06:20 PM
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Originally Posted by emilio700 View Post
The twin ceramic has been in stock. Waiting on the first batch of Kevlar/Carbon discs. There will be no organics again for the twin.
Originally Posted by Alternative View Post
"Full disclosure, we found a new source for the much-loved organic discs and put them back into production. We should have them in stock within the next four weeks or so."

So this is not accurate?
Reading comprehension. Its hard
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Old 01-21-2017, 06:51 PM
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Conflicting statements from the same person, just trying to get a straight story.
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Old 01-21-2017, 06:53 PM
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Old 01-21-2017, 08:08 PM
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The non ceramic was generically referred to as the "organic" during development. The final production discs are Kevlar/Carbon though, not traditional organic material. Just semantics. Apologies for any confusion.

Thanks for the hate though, much appreciated!
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Last edited by emilio700; 01-22-2017 at 11:26 AM.
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