General Miata Chat A place to talk about anything Miata

New clutch still slipping

Thread Tools
 
Search this Thread
 
Old 03-23-2008, 06:13 PM
  #1  
Senior Member
Thread Starter
iTrader: (7)
 
wes65's Avatar
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
Default New clutch still slipping

So, i recently installed a begi s1 with 460cc injectors and the clutch started slipping. There is a shop around here that sells clutches and the guy said it would be good to 300lb/ft. however, after replacing the clutch it still slips at around 8 psi. Any ideas? I mean, unless it is something else. When i put it to the floor it accelerates to around 3k-4k and then the rpms shoot way up and im not going any faster. It doesnt feel like wheelspin. Could it be an adjustment issue? My flywheel looked good so i didnt have it resurfaced. The original clutch had 63k miles on it.

Thanks in advance.
-Wes
wes65 is offline  
Old 03-23-2008, 06:15 PM
  #2  
Elite Member
iTrader: (12)
 
Doppelgänger's Avatar
 
Join Date: Sep 2007
Location: Charlotte, NC
Posts: 6,850
Total Cats: 71
Default

do you have a fidanza flywheel??
Doppelgänger is offline  
Old 03-23-2008, 06:23 PM
  #3  
Senior Member
Thread Starter
iTrader: (7)
 
wes65's Avatar
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
Default

stock flywheel
wes65 is offline  
Old 03-23-2008, 06:25 PM
  #4  
Elite Member
iTrader: (12)
 
Doppelgänger's Avatar
 
Join Date: Sep 2007
Location: Charlotte, NC
Posts: 6,850
Total Cats: 71
Default

could be warped...unless you had it resurfaced when you had the new clutch installed. Did you just buy a new clutch disk or did you replace the pressure plate too?
Doppelgänger is offline  
Old 03-23-2008, 06:29 PM
  #5  
Senior Member
Thread Starter
iTrader: (7)
 
wes65's Avatar
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
Default

i bought a new pressure plate and clutch disc. Did not have the flywheel resurfaced.
wes65 is offline  
Old 03-23-2008, 06:37 PM
  #6  
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
Default

Originally Posted by wes65
i bought a new pressure plate and clutch disc. Did not have the flywheel resurfaced.
i've been down this road before. You fucked up.
hustler is offline  
Old 03-23-2008, 07:47 PM
  #7  
Elite Member
iTrader: (16)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 9,292
Total Cats: 475
Default

Meh, I doubt it's the flywheel. Could be, but usually that will cause lots of shudder. Is engagement smooth? Try adjusting the pedal. There's a writeup on m.net.
patsmx5 is offline  
Old 03-23-2008, 07:50 PM
  #8  
Senior Member
iTrader: (5)
 
urgaynknowit's Avatar
 
Join Date: Dec 2007
Location: worcester ma
Posts: 1,116
Total Cats: 0
Default

My flywheel looked good so i didnt have it resurfaced.**********

thats ur problem
urgaynknowit is offline  
Old 03-23-2008, 08:12 PM
  #9  
I'm Miserable!
iTrader: (5)
 
bryantaylor's Avatar
 
Join Date: Dec 2006
Location: jacksonville, fl
Posts: 1,711
Total Cats: -1
Default

what kind of clutch. you said local place did it, we have a place that does it here too. if its like our place its a 4 puc and a stock pressure plate, am i on the right trac? if so, did you brake it in? be honest, because you HAVE to brake in those ceramic clutches easy or it will slip like you descirbed
bryantaylor is offline  
Old 03-23-2008, 08:21 PM
  #10  
Senior Member
iTrader: (5)
 
urgaynknowit's Avatar
 
Join Date: Dec 2007
Location: worcester ma
Posts: 1,116
Total Cats: 0
Default

Originally Posted by bryantaylor
what kind of clutch. you said local place did it, we have a place that does it here too. if its like our place its a 4 puc and a stock pressure plate, am i on the right trac? if so, did you brake it in? be honest, because you HAVE to brake in those ceramic clutches easy or it will slip like you descirbed
if it was one of those, those stink to drive around in town
the break in period on those is stupid also

ask the shop, then come back to us
urgaynknowit is offline  
Old 03-23-2008, 08:30 PM
  #11  
I'm Miserable!
iTrader: (5)
 
bryantaylor's Avatar
 
Join Date: Dec 2006
Location: jacksonville, fl
Posts: 1,711
Total Cats: -1
Default

Originally Posted by urgaynknowit
if it was one of those, those stink to drive around in town
the break in period on those is stupid also
i never had a problem with the one i had, even had it re-pucked once. 500 miles is all i broke mine in for
bryantaylor is offline  
Old 03-23-2008, 09:31 PM
  #12  
Senior Member
iTrader: (5)
 
urgaynknowit's Avatar
 
Join Date: Dec 2007
Location: worcester ma
Posts: 1,116
Total Cats: 0
Default

Originally Posted by bryantaylor
i never had a problem with the one i had, even had it re-pucked once. 500 miles is all i broke mine in for
my break in period included me pulling out of the driveway
revving it and doing the longest burn out
enjoying my hard work

ive done this on all the cars ive owned,
i did this with my swapped civic,
and i put thousands of miles on it


thats my idea of "breaking it in"


i honestly would suggest having ur flywheel resurfaced. and or, ask the guy at the shop , to show u the specs for the clutch, so u know hes not just bluffin
urgaynknowit is offline  
Old 03-23-2008, 09:38 PM
  #13  
Senior Member
Thread Starter
iTrader: (7)
 
wes65's Avatar
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
Default

The clutch pedal is very easy to press down, like, easier than stock. The guy at the shop said that it was a "dual friction" and the two sides of the disc looked different. One looked like the stock one and one side was a "button" face. I asked him about break in and he said that it didnt need to be broken in.
wes65 is offline  
Old 03-23-2008, 09:42 PM
  #14  
Elite Member
iTrader: (12)
 
cardriverx's Avatar
 
Join Date: Jan 2007
Location: Hermosa Beach, CA
Posts: 2,573
Total Cats: 12
Default

Originally Posted by wes65
The clutch pedal is very easy to press down, like, easier than stock. The guy at the shop said that it was a "dual friction" and the two sides of the disc looked different. One looked like the stock one and one side was a "button" face. I asked him about break in and he said that it didnt need to be broken in.
hes half right. The side that looks stock (organic face) NEEDS BREAK IN. The other side was prob ceramic, what doesent need break in (for all the haters, check ACTs site, they tell you their ceramic and sintered iron clutches dont need break in.)

FYI I have a ceramic disc, took it easy for about 2 miles, and beat on it a little. Grabs perfect 7k miles later.
cardriverx is offline  
Old 03-23-2008, 09:42 PM
  #15  
Newb
 
Mikado's Avatar
 
Join Date: Mar 2008
Posts: 7
Total Cats: 0
Default

Did you remove the glazing on the flywheel?
This at least should have been done. The clutch is just another form of a brake. Just as the disks need to have the glazing removed for new pads to work best, so does the flywheel.
I don't think it is the clutch adjustment, but just to make sure- release the hydrolic fluid in the slave and pump it up again.
Mikado is offline  
Old 03-23-2008, 09:44 PM
  #16  
Elite Member
iTrader: (16)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 9,292
Total Cats: 475
Default

IMO, you have to break in all clutches. Maybe there's an exception, but I always break them in. That's probably your problem. I take break in seriously. If it says 500 miles, that doesn't mean 450, or 480.

The pressure plate being softer than stock is not good. That sucks. If anything, you want it stiffer for more clamping force. Did you or the shop install the clutch? When does it engage/disengage relative to the pedal? (does it grab an inch off the floor or really high, like right before you take your foot off?)
patsmx5 is offline  
Old 03-23-2008, 09:45 PM
  #17  
Senior Member
Thread Starter
iTrader: (7)
 
wes65's Avatar
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
Default

i installed the clutch, im not sure on the engagement/disengagement, i have somewhere to go, so i will drive the car right now and see how it is.
wes65 is offline  
Old 03-23-2008, 10:17 PM
  #18  
I'm Miserable!
iTrader: (5)
 
bryantaylor's Avatar
 
Join Date: Dec 2006
Location: jacksonville, fl
Posts: 1,711
Total Cats: -1
Default

Originally Posted by patsmx5
IMO, you have to break in all clutches. Maybe there's an exception, but I always break them in. That's probably your problem. I take break in seriously. If it says 500 miles, that doesn't mean 450, or 480.
+1. some thing need a "hard break in" but a clutch is deff not one of those things.

also pedal feel has nothing to do with the plate pressure. on my probe, the comp clutch PP i had was a tad softer pedal than the stock PP i had. comp was i think 1800lbs and stock was something like 1000-1200 lbs.
bryantaylor is offline  
Old 03-23-2008, 10:27 PM
  #19  
Senior Member
Thread Starter
iTrader: (7)
 
wes65's Avatar
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
Default

the pp is supposed to be a 1200lb one, what is the stock one?
wes65 is offline  
Old 03-24-2008, 08:39 AM
  #20  
Senior Member
Thread Starter
iTrader: (7)
 
wes65's Avatar
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
Default

the disengagement feels very smooth and is about 1/4 of the way down
wes65 is offline  


Quick Reply: New clutch still slipping



All times are GMT -4. The time now is 01:46 AM.