I just installed an Exedy hyper twin plate on my turbo b-series and it is slipping. Of course I took every care when installing it, such as cleaning surfaces, ensuring the correct orientation of plates/discs, but something is clearly wrong. The clutch seemed to work fine for the first half hour of street driving (grabbed hard) then slowly fell off, to the point where I could barely get in the driveway. I believe that it is not engaging fully but in don't know why. I checked the movement of the shift fork and the slave cylinder both seem fine.
Any help would be welcome.

Set Up - Turbo B-series 400hp, Exedy hyper twin plate.

 

is it a hyper single or a twin disk? the hyper single *looks* just like a twin disk

ive gotten 2 seasons out of each of my exedy twin disks at over 800 horsepower. the hyper single is not very turbo car friendly though

 

yeah the term hyper is only used on the single disk clutches which leads me to believe you have a single disk, but you would know if you put 2 discs and a plate in between though. like joe said those twins have no problem holding power.

 

It's definitely a twin plate, of that I'm certain, sorry for the confusion.

Why is it slipping, or not fully engaging? ? That's what I need to find out. As of yet all I can give are the symptoms as given earlier in the post. I'll be pulling the transmission off soon to get the hard facts. so this is definitely an exploratory question.



Modified by Hriday at 5:50 PM 4/22/2008

 

Im having the SAME EXACT problem! I sent it back to exedy and they said I didn't have the master cylinder set properly......bullshit, like I dont work on cars every day and not know how to adjust a clutch!! I've swapped out the slave a couple times and master once, but not with oem parts, so Im gonna try that once the car is back up and running. I hope you find your problem cause I've been chasing it for a while now

 

I took the slave cylinder off and checked to see if it had any binding and if it was compressing fully. It had no binding and was compressing fully. I've for the most part ruled that out because the clutch seems to disengage fine. I can go into gear smoothly and easily with no grinding. Why it is not engaging fully is a mystery to me


The exedy japan page had a nice trouble shooting PDF. Perhaps I used the incorrect grade grease on the spline? I think that may be a possibility. But I'm at pains to explain why that would make the clutch fall off as I drove?


Modified by Hriday at 6:26 PM 4/22/2008

 

To add to my situation.....

What I did notice is that the hydro system will build pressure, seems to be with heat. If when this happens I get out and crack the bleeder on the slave it pisses out fluid, and I mean pisses it out like someone has the clutch pedal to the floor. After I crack it and lock it then I'll get a pedal again for a short time. I've noticed this happening even when the clutch never gets actuated, just leaving the car idling for 20-30 minutes will make it happen. Also forgot to mention that I've changed the fluid to DOT4 with no change

 

Sounds like you may have the master cylinder slightly applied which would explain your issue. Back the M/C push rod off a little bit and see if that improves it a little.

 

I'll try that, is that done at the pedal like the brake M/C?

 

Yes pretty much the same thing. It is kind of like if you put a brake master cylinder on and the pushrod is a little too long and has the brakes slightly applied after you push them the first time. After a while the pressure bleeds off and everything is normal again until you push the pedal again. You probably wont have to unscrew it much at all. Good luck. I have been through that scenario before after putting a new clutch m/c on.

 

I crawled in the car today to udjust the clutch M/C and noticed that the clutch sensor for the hondata was adjusted all the way down, to the point where it was actually pushing on the clutch about 1/2 to 3/4's of an inch. I adjusted it back so that it was not pushing on the pedal. I drove the car around the city fior about 20 min and everyhting seems to be ok now.

 

wow dan i didnt know you were battling that clutch, like joe, (w/o the power level) my clutch is the same one i beat on in 06 didnt change anything with it and put it on my new engine, 200whp more and 150 more wtq. no issues.

wish i had an answer.

 

You have the discs facing the right way?

 

deff shoulds like u have some pressure at all times. if oils comming out & u aint pushing the pedal. adjust it all the way out & re adjust.
i would also flush the system completly, maybe their is something in the system so when u release the clutch its moving back but then kinda clogging a port of some sort not letting it bleed all back into the res.

& did u off-set the disks?


Modified by ALL IMPORT at 6:50 PM 4/23/2008

 

Yes, the disc's are in the correct way and also offset the way they should be. I flushed the system also too. I've even heard that if the stock rubber line coming off the frame rail gets hard it'll constrict and hold pressure so I swapped it for a stainless line and still had the same issue. This was a couple months ago and the car has been down for that time but it should be back up this weekend if all goes well so I can play with it again.
I've played with the clutch master many times, but there maybe some dirt or something in there. My next plan of attack is replacing it with either an OEM master or the Tilton unit. Wish me luck

 

make sure your slave cylinder is not getting too hot which would cause your your fluid to expand and push on the clutch fork as if you were pressing on the clutch. When it starts to slip try cracking open your bleeder and see what happens.

 

It does push out fluid when I crack it. Its been a while since the car was running, but I seem to remember hitting it with a temp gun and seeing over 220. I also have a Deist tranny blanket over it which Im sure is trapping heat, not to mention my 4" downpipe is really close as well. I'll find out after this weekend more after I get the new turbo on and get the car back up and running.

 

sounds 2 me like u just answered your own problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ALL IMPORT &raquo;</TD></TR><TR><TD CLASS="quote">
& did u off-set the disks?


Modified by ALL IMPORT at 6:50 PM 4/23/2008</TD></TR></TABLE>

is that installing the disks where the pucks dont line up?

 

yeah

 

Put a dent on the downpipe right where the bleeder is for your slave. Have at least 2 inches of space between your downpipe and slave bleeder. that should solve your problem