Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: Another Clutch Bites The Dust!

+ Reply To Thread
Posts: 31-36 of 36
2012-04-13 00:39:09
#31
Doing this occasionally:


with a solid hub disk... will break the p11 tranny eventually. I did 3-4 rolling burnouts like this, and it fatigued the transmission enough that after the new motor was put together it broke 3rd at only 10psi getting on the freeway. Here's a video of that:



My wife was taping my kid's reaction... then laughed at me "You broke something? I knew it.. I knew it."

I had a p11 transmission for 2 years making 440whp on high boost, and 360whp on low boost. Hundreds of drag passes. I finally broke 2nd on that transmission with the sprung disk. but it held up to a ton of abuse.

After that transmission blew I went to the tubular manifold and got a new clutch. Then I started having issues with transmission failures. Solid hub should be a last resort, and I'm sure other's would agree. You should be able to get a disk that will hold up to quite a bit of abuse without spring issues. I got about 400 drag passes on my sprung clutch at 360whp, and a few on high boost. Springs were starting to work loose, but never came out or caused the disk to bind.

Get a good caged sprung disk. Go solid only if you must, perhaps you will not have issues with your transmission. but if you break your transmission: http://www.sr20-forum.com/forced-induction-turbo/22613-how-fix-your-p11-b15-tranny-qg18-gear-stacks-56k-no.html

best of luck!
2012-04-13 05:27:45
#32
Originally Posted by Coheed
If you wanna save that trans, keep the clutch as the weak link. get a pp with tons of clamp, then use a ceramic 6-puck disk... on that won't lose springs.


This.

I had a much lower hp setup ~240 with an unsprung stage 1 clutchmasters disc. This is the only case where unsprung isn't really a tranny shocker; the entry level aftermarket clutch.
It held and held. Clutchmasters is the brand I swear bye, but I'm kind of surprised you are breaking so many south bend clutches. A lot of serious SR guys have pushed boost through their stuff for many years. Every other clutch maker has had a lot of failures (spec, comp, ACT etc)

Anyway I sold the car to a guy who I am told does a lot of "highway pulls' or whatever and he snapped the disc a few months later and was a tiny bit salty at me. I asked him whether it was harder to get a new disc or a new transmission... he thanked me.
2012-04-13 06:07:06
#33
Originally Posted by boostednx
I had a comp clutch single disk and didn't like it and it slipped on me. I then switched to a fx500 and it never looked back. That's why I purchased a clutchmasters twin disk for my new setup.


was it their stage 2? I have a stage 4 6 puck sprung but not sure if it would hold my goals on my new build
2012-04-13 13:24:20
#34
Originally Posted by Coheed
Get a good caged sprung disk. Go solid only if you must, perhaps you will not have issues with your transmission. but if you break your transmission: http://www.sr20-forum.com/forced-induction-turbo/22613-how-fix-your-p11-b15-tranny-qg18-gear-stacks-56k-no.html

best of luck!


Thanks, I never seen that thread! Good info!

Originally Posted by Benito
I asked him whether it was harder to get a new disc or a new transmission... he thanked me.




Originally Posted by 200sx
My next clutch WILL BE un sprung. This loosing spring stuff is gettin old with me. Especially since I just lost one a few days ago........again.....


Yeah with a sprung disc its not a matter of "if it will go", its "when". Sometimes they will last thousands of miles with no issues tho.. but we all know its temporary
2012-04-13 15:12:17
#35
Also you may want to try a new flywheel. If its been skimmed 6-7 times.... I'd at least get the factory specs and throw my digital calipers on it.

Really spend a few minutes on that because there's like a step or something and a few other minute but critical specs that its supposed to have and a lot of shops will just scour over it because they hand your flywheel to somebody's nephew who's volunteering during spring break or some other nonsense... "here junior learn something about the lathe."

I know what you are saying... all of these clutches will blow on a 350-400whp setup or lunch the gearbox, but I think people who are really careful with their installs get more miles on them and have much fewer surprise failures.
2012-04-14 11:40:51
#36
Originally Posted by Benito
Also you may want to try a new flywheel. If its been skimmed 6-7 times.... I'd at least get the factory specs and throw my digital calipers on it.


Yeah when I tear her down this time I'm going to trash the current flywheel and put in a new one. That way I know for certain the specs are correct.
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top