Thinking about switching back to an act puck disk after the last trackday - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-18-2011, 06:43 PM   #41
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

Quote:
Originally Posted by BlackBandit View Post
You want to sell the twin disk? How come? I might be interested but I just want to hear from you your pros and cons about it.
Was that addressed to me?

While it works very well for a street car, it's just not up to a 20 mile commute with stop and go traffic. Service life in real-world daily driver use is between 18 and 24 months. The reason is slippage and heat. The parts dont wear out, they warp over time.

In a track/race car, the clutch has a much lower slip-to-rest ratio and it gets time to cool down. And the number of times you are starting from a stop when racing is pretty low compared to in traffic.

I suppose I could have vented my bell housing (and now that I think about it, I wish I had tried that) to get more life but I didn't.

Pros: bragging rights, holding nearly 400hp, near stock pedal feel, easy driveability.

Cons: I don't have a garage anymore so changing it every 2 years gets to be a bit of a challenge (especially since my driveway is dirt). That's really it.
y8s is offline   Reply With Quote
Old 01-18-2011, 10:51 PM   #42
Junior Member
iTrader: (2)
 
Join Date: Nov 2010
Posts: 499
Total Cats: 48
Default

Thanks for the input. I do have a dd and though I don't see much stop and go, the idea to fix and swap parts every couple years is a turn off like you said. I will be autocrossing on weekends whenever there is a track setup locally. I also do not own a garage and see why it's an inconvenience. I did plan on getting a street clutch and lightened flywheel what rounded around 800 and thought that if I saved an extra couple hundred for the twin disk. But after your experience I appreciate you solidifying my decision.
BlackBandit is offline   Reply With Quote
Old 01-19-2011, 02:46 PM   #43
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,308
Total Cats: 1,326
Default

Quote:
Originally Posted by BlackBandit View Post
Thanks for the input. I do have a dd and though I don't see much stop and go, the idea to fix and swap parts every couple years is a turn off like you said. I will be autocrossing on weekends whenever there is a track setup locally. I also do not own a garage and see why it's an inconvenience. I did plan on getting a street clutch and lightened flywheel what rounded around 800 and thought that if I saved an extra couple hundred for the twin disk. But after your experience I appreciate you solidifying my decision.
Note that Y8s is a home built twin based on Tilton hardware and using I believe, .150" thick discs. The 949 Racing twin is not a Tilton and uses custom made .250 thick disc (same thickness as OEM). Our twin organic will last a very long time, probably forever for most users.
emilio700 is offline   Reply With Quote
Old 01-19-2011, 03:08 PM   #44
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

i have the rally clutch which uses .280 thick disks. as i said, they didn't wear out, the floaters warped.
y8s is offline   Reply With Quote
Old 03-31-2011, 12:37 PM   #45
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2006
Location: ABQ, NM
Posts: 1,850
Total Cats: -8
Default

Everything was dry inside and did not see any signs of contamination. but I did see lots of evidence of over heating and slipping.

IMGP0841.jpg?t=1301583394

IMGP0842.jpg?t=1301583378

IMGP0846.jpg?t=1301583378


I switched back to a 4 puck and seems to be good, but haven't had a good chance to thrash it at the track yet.
BenR is offline   Reply With Quote
Old 03-31-2011, 12:53 PM   #46
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,105
Total Cats: 518
Default

With localized heat spots on the pressure plate and I think the friction plate, I would suspect something is/was bent or is/was mounted incorrectly (not flat).
curly is offline   Reply With Quote
Old 03-31-2011, 12:58 PM   #47
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: Jun 2006
Location: ABQ, NM
Posts: 1,850
Total Cats: -8
Default

Quote:
Originally Posted by curly View Post
With localized heat spots on the pressure plate and I think the friction plate, I would suspect something is/was bent or is/was mounted incorrectly (not flat).

I torqued to the proper torque, using the proper method. But that could have been a possibility. The other side of the disk does not have that same pattern. You can see the discolorations on the disk from heat.
BenR is offline   Reply With Quote
Old 04-05-2011, 02:33 PM   #48
Junior Member
iTrader: (2)
 
Join Date: Nov 2010
Posts: 499
Total Cats: 48
Default

I just bought a spec 3 clutch with a fidanza flywheel. Its going in the beginning of next week. I also purchased ss clutch race lines from 949 today. All I need to do is buy replacement seals and such for the rest of the job.
BlackBandit is offline   Reply With Quote
Old 04-05-2011, 02:49 PM   #49
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,809
Total Cats: 1,780
Default

only looks like half the material was grabbing.
Braineack is offline   Reply With Quote
Old 04-06-2011, 01:50 AM   #50
Senior Member
iTrader: (8)
 
paNX2K&SE-R's Avatar
 
Join Date: Dec 2007
Location: Mocksville, NC
Posts: 675
Total Cats: 11
Default

My Exedy Stage 1 started slipping after slightly less than 12 months of use. Yesterday I ordered the ACT XT/6 puck sprung setup to replace it. I've never had a puck style disc before so its going to be interesting to try it out.
paNX2K&SE-R is offline   Reply With Quote
Old 04-10-2011, 08:19 PM   #51
Elite Member
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Quote:
Originally Posted by paNX2K&SE-R View Post
My Exedy Stage 1 started slipping after slightly less than 12 months of use. Yesterday I ordered the ACT XT/6 puck sprung setup to replace it. I've never had a puck style disc before so its going to be interesting to try it out.
If your not paying attention, it will make you look like a kid that is just learning to drive a stick when pulling away from a stop light.
miatauser884 is offline   Reply With Quote
Old 04-11-2011, 09:40 AM   #52
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,809
Total Cats: 1,780
Default

You'll quickly get used to it. But it takes me care when starting from a stop like djp suggests. I could drive mine like a stock disc, but I got tired of the effort required when DDing the car, so I went back to a street disc.
Braineack is offline   Reply With Quote
Old 04-11-2011, 06:35 PM   #53
Senior Member
iTrader: (8)
 
paNX2K&SE-R's Avatar
 
Join Date: Dec 2007
Location: Mocksville, NC
Posts: 675
Total Cats: 11
Default

Thanks for the input guys. The only time I usually have serious stop and go traffic is coming home when I'm working 7-3:30 on a weekday which is usually only 6-8 times per month.
paNX2K&SE-R is offline   Reply With Quote
Old 04-11-2011, 07:55 PM   #54
Elite Member
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

I like mine a lot
miatauser884 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Need help - Stock Balancer and Fastforward overlay pulleys Frank_and_Beans Supercharger Discussion 13 09-12-2016 09:17 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 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 12:23 AM.