twin disk questions... - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


949Racing - Miata Accessories 949 Racing 20601 Canada Rd Suite A Lake Forest, CA 92630-8100

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 04-18-2016, 11:23 PM   #21
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

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.
aidandj is offline   Reply With Quote
Old 04-19-2016, 06:26 PM   #22
Elite Member
Thread Starter
iTrader: (10)
 
IcantDo55's Avatar
 
Join Date: Apr 2007
Location: VA Beach
Posts: 1,764
Total Cats: 18
Default

Measured and its almost new! yea.
IcantDo55 is offline   Reply With Quote
Old 04-19-2016, 06:35 PM   #23
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,311
Total Cats: 1,334
Default

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.
emilio700 is offline   Reply With Quote
Old 04-19-2016, 07:10 PM   #24
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

Quote:
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.
aidandj is offline   Reply With Quote
Old 04-20-2016, 10:36 AM   #25
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

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.
y8s is offline   Reply With Quote
Old 04-20-2016, 01:16 PM   #26
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

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.
aidandj is offline   Reply With Quote
Old 04-20-2016, 02:22 PM   #27
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,311
Total Cats: 1,334
Default Heel plant

Quote:
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.
emilio700 is offline   Reply With Quote
Old 04-20-2016, 02:30 PM   #28
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

Quote:
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.
aidandj is offline   Reply With Quote
Old 04-21-2016, 02:41 AM   #29
MT Pony Underground
iTrader: (6)
 
Nagase's Avatar
 
Join Date: May 2009
Posts: 1,811
Total Cats: 0
Default

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
Nagase is offline   Reply With Quote
Old 01-21-2017, 02:08 PM   #30
Junior Member
 
Join Date: Jan 2015
Posts: 272
Total Cats: -22
Default

What is the status of the new organic disks?
Alternative is offline   Reply With Quote
Old 01-21-2017, 03:06 PM   #31
Junior Member
iTrader: (3)
 
Join Date: Apr 2009
Location: McDonough Ga.
Posts: 356
Total Cats: -26
Default

Subbed for reply
Greg
Reverend Greg is offline   Reply With Quote
Old 01-21-2017, 03:10 PM   #32
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,311
Total Cats: 1,334
Default

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
emilio700 is offline   Reply With Quote
Old 01-21-2017, 05:15 PM   #33
Junior Member
 
Join Date: Jan 2015
Posts: 272
Total Cats: -22
Default

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....
Alternative is offline   Reply With Quote
Old 01-21-2017, 06:27 PM   #34
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,311
Total Cats: 1,334
Default

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.
emilio700 is offline   Reply With Quote
Old 01-21-2017, 06:30 PM   #35
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

Production Kevlar/carbon? Or another prototype. If production is there any info on longetivity or torque capacity vs ceramic?
aidandj is offline   Reply With Quote
Old 01-21-2017, 07:19 PM   #36
Junior Member
 
Join Date: Jan 2015
Posts: 272
Total Cats: -22
Default

"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?
Alternative is offline   Reply With Quote
Old 01-21-2017, 07:20 PM   #37
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

Quote:
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.
Quote:
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
aidandj is offline   Reply With Quote
Old 01-21-2017, 07:51 PM   #38
Junior Member
 
Join Date: Jan 2015
Posts: 272
Total Cats: -22
Default

Conflicting statements from the same person, just trying to get a straight story.
Alternative is offline   Reply With Quote
Old 01-21-2017, 07:53 PM   #39
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,992
Total Cats: 1,459
Default

.
aidandj is offline   Reply With Quote
Old 01-21-2017, 09:08 PM   #40
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,311
Total Cats: 1,334
Default

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!

Last edited by emilio700; 01-22-2017 at 12:26 PM.
emilio700 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
MS3 Basic 6000 rpm backfire and check engine light poormxdad MEGAsquirt 67 04-24-2016 04:50 PM
Spec Miata Display techracer87 Race Prep 8 04-08-2016 02:21 PM
Double check my ms3x build p0staldude MEGAsquirt 5 03-31-2016 02:03 PM
Mistakenly bought a MS DIY kit right before they redid the website. In over my head. kable26 MEGAsquirt 5 03-26-2016 11:17 PM
Bought a Miata MS3/MS3x kit to use on a 240sx, know if I need to change anything? MostHated MEGAsquirt 0 03-01-2016 08:04 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:54 PM.