10 PSI ATE my new stock clutch

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gixxer750

2jzget comingsoon!
Mar 30, 2005
2,333
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Mississippi
10 PSI devestated my stock clutch today. It was put in when I built the engine. That is not good :( Now, I have to go spend more money on my supra. I think its the clutch anyhow. I don't hear tires spinning, and the car stays straight, but on the 1-2(and only the 1-2 shift) the rpms will climb to around 5 for three seconds and then fall back to where they should be. It doesn't do this on any other gear shift for some reason. Its dark so I can't look for the black marks if there are any. I can't see it spinning the bridgestone potenza's on the back( 245/ 35 ZR 16) for that long.
 
p5150

p5150

ASE and FAA A&P Certified
Mar 31, 2005
1,176
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Central Idaho
thats not your clutch dude

A clutch will spin at higher gears if its bad because it has less of a mechanical advantage on the back wheels. Lower gears like first and second will only spin the clutch when it is totally fucked. If you are accellerating normally in third, fourth and especially fifth, its definately not your clutch.
 
aye mate

aye mate

Hiatus over.
Mar 30, 2005
1,926
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Maryland
I replaced my clutch with a brand new OEM disc and PP and about 2 months on 12psi and it slips whenever I hit boost in 3rd,4th and 5th. Since I'm not planning on getting a big power turbo for a while I went with a Spec stg. 2, rated to 460ft.lbs. Got it at JSCspeed.com for 426 shipped. Haven't installed it yet but I have heard great things about Spec from other MKIII owners.
 
GrimJack

GrimJack

Administrator
Dec 31, 1969
12,377
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idriders.com
The quick and dirty clutch test is this.

Start easy in first, easy in second, and then put it straight into 5th and hammer the throttle. Watch the RPMs - if they shoot up without an increase in speed, your clutch is fried.

A worn clutch should slip in 5th... a clutch that's dead will slip in fourth, a clutch that's worse than dead slips in third, a clutch that needs a preacher right now will slip in second, and anything beyond that is already in the ground. ;)
 
lagged

lagged

1991 1JZ
Mar 30, 2005
2,616
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38
new rochelle
yeah my brand new stock clutch is slipping with my rebuilt motor. 10 pounds of boost and over sized pistons. i dunno why i thought it could take it....

oh yeah, thats a stock W58 clutch disk too...
 
northsupra

northsupra

Normally Insane
Mar 30, 2005
99
0
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Norway
GrimJack

A worn clutch should slip in 5th... a clutch that's dead will slip in fourth, a clutch that's worse than dead slips in third, a clutch that needs a preacher right now will slip in second, and anything beyond that is already in the ground.
Click to expand...

Ha ha and my clutch is slipping in first under allmost no trottle.
Ha ha shouldent have taken the last burnout :biglaugh:
I'll give you a pic of it soon, The Supra is up on jackstands and i'm playing mechanic and hopefully i'll get finnished soon.
 
drunk_medic

drunk_medic

7Ms are for Cressidas
Apr 1, 2005
574
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Woodstock, GA
Good.. do it yourself. You will save money. When I didn't know jack about this car, my boost controller helped eat my clutch. 11.5 psi in 3rd and at about 4000rpms WOT it would decellerate, but the RPMs would shoot up.
Cost more for labor at the local Toyota dealer than it did for a TRD clutch. Do yourself a favor and make sure you replace it NOW. The dealer usually also recommends an install kit for the clutch, with a pilot and throwout bearing, and some other parts.. and rear main oil seal was optional, but I had that done anyways. That whole thing was a quick drop of $1200 or so - I'll never go there for anything but parts.. and even then, I will just order them from Curt Aigner.
 
G

gixxer750

2jzget comingsoon!
Mar 30, 2005
2,333
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Mississippi
Hmmmm.....N/M.... It was the rears spinning hard. I don't know how the car managed to stay straight. I may have forgotten to mention it in my above post, but it only did this under hard(very) acceleration. I just took it out and hit it hard in first, then shifted to second. Did the same thing. I went back and looked and there is about 15 foot of black marks on the road. So, I guess that is problem solved :) Just need some better rubber in the back
 
bigaaron

bigaaron

Supramania Contributor
Apr 12, 2005
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www.driftmotion.com
Is it adjusted correctly? Any new clutch install should be followed by a pedal adjustment. I have had several people tell me their clutch was toast and I checked the adjuster and it was not engaging fully. It is impossible to just ruin a new clutch with 10psi if it is installed and adjusted correctly. You would have to have smoke pouring out of the bellhousing for 20 minutes straight. I am running 395ft/lbs through the stock clutch disk and a trd pressure plate and I can light up my drag radials all the way down the street. The stock disk is pretty good considering how much abuse it can take, the cost, and the ease of driving with one.
 
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aye mate

aye mate

Hiatus over.
Mar 30, 2005
1,926
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Maryland
bigaaron said:
I am running 395ft/lbs through the stock clutch disk and a trd pressure plate and I can light up my drag radials all the way down the street. The stock disk is pretty good considering how much abuse it can take, the cost, and the ease of driving with one.
Click to expand...
Interesting...How long have you been using that set-up? Thats some useful crap right there. :bigthumb:
 
G

gixxer750

2jzget comingsoon!
Mar 30, 2005
2,333
0
0
Mississippi
I broke it in for a thousand miles with the engine :) However, I did find it to be slipping some later on today in 5th gear, but not all the time. Sometimes it would do it at 6 psi, and sometimes it wouldn't at 10. Earlier in my break in I found that the pedal would stick halfway down occasionally, so I think the piston is sticking in the master cylinder, causing my clutch problem.

I would like to add my kill list for tonight :)

2003 WRX
AE86 Corolla
2002 Mustang GT(stock except for exhaust.)

I really really wonder how much power I am putting down. Anyone care to look at my mods list in my sig and take a guess? I did port and polish my exhaust manifold while it was off, and the turbo is almost brand new, I think thats the only other thing. I'd really like to know, and I don't think there is a dyno in the state.
 
I

IJ.

Grumpy Old Man
Mar 30, 2005
38,728
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I come from a land down under
Gixxer: By the time you get to 10 PSI the motor might be over it's torque peak!

I'm using an ACT W58 street clutch and haven't noticed it slip yet but I'm maxxed at 9psi till I get the new IC in.
 
G

gixxer750

2jzget comingsoon!
Mar 30, 2005
2,333
0
0
Mississippi
I dunno....I can have 10psi by 2500 rpm in second gear. This thing feels really torquey.....Its still breathing through that stock exhaust, but the new one is made. Its sitting in my garage waiting its time. I bet this turbo is gonna spool great with the 3" on :) I'm about to make my hardpipes shortly and have them all powdercoated. I guess I'm gonna get like an ACT pressure plate and a stock disk and try to see how that setup works because I'm sure I've toasted the clutch by now. It will now slip in first gear and won't spin the tires over.
 
H

Halsupramk3

Member
Apr 4, 2005
444
0
16
Mississippi
If there are any heat spots on the flywheel it must be machined or you are wasting time.

Also Bigaaron is correct sometimes you need to adjust to make sure it is engaging correctly. Some people it doesnot disengage correctly and others not enough.
 
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