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clutch tech -- why do ours suck?!

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Old Jan 29, 2004 | 01:22 PM
  #16  
silvrevo's Avatar
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From: Big Red Country
Hey scooby,,,

were your gears notchy, or grindy when shifting, before you removed your clutch restritor? And if so did removing it solve the notchy/grindy feel of the shifter?

Thanks!
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Old Jan 29, 2004 | 01:26 PM
  #17  
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I took out the restrictor and the car feels totaly diffrent in a good way
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Old Jan 29, 2004 | 01:34 PM
  #18  
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Originally posted by silvrevo
Hey scooby,,,

were your gears notchy, or grindy when shifting, before you removed your clutch restritor? And if so did removing it solve the notchy/grindy feel of the shifter?

Thanks!
That notchy feel on the shifter was there before and after I did the mod. It isn't related to the clutch or the clutch line. I actually don't mind it, although my gears don't grind at all. HTH

-ScoobyBoost

Oh yeah and personally I don't think the clutch itself is all that weak. I believe most of the clutch issues people are seeing are due to the restrictor. It serves a purpose for the average driver. However, enthusiasts are rarely average drivers.

The restrictor causes the clutch to prematurely burn out if you drive it hard because the restrictor delays and dampens the engagement of the clutch as you let the pedal out. This causes serious issues when you try to shift quickly or especially if you're doing hard fast launches (even if you do it right). As others have said sacrifices the clutch to save the tranny. It's actually pretty clever.

You can solve this issue by removing that restrictor, but BEWARE! If you beat on your car you are risking your tranny/transfer case without that restrictor. If you can drive hard without beating on your car then this is the perfect solution. Trouble is that line can be pretty thin.

Peace

Last edited by ScoobyBoost; Jan 29, 2004 at 01:46 PM.
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Old Jan 29, 2004 | 01:52 PM
  #19  
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From: Richmond, VA
Re: clutch tech -- why do ours suck?!

Originally posted by crosvs
[BNow truth betold- i *DO* know that, as Top Gear demonstrated, even the Lambo Murc with almost 600 HP couldn't have any wheelspin also, and so its clutch had to be slipped as well ... so I guess the point is you just can't do spin 4 wheels no matter HOW much power you've got ... within reason anyway.

[/B]
Well, it wasn't a Lamborghini Murcielago, but it was a Lamborghini Diablo I saw a video of - roasting all 4 tires, quite impressively I might add.

Just to ring in on this subject...I personally feel that Mitsu purposely weakened the clutch to save money on warranty costs of driveline components. Clutch goes out - they can blame you for driving it harshly. Tranny goes out - it's defective from the factory - hard to blame you for that.

I honestly don't feel like our EVO's have the strongest clutch on the market OR the strongest drivelines. The car isn't meant for drop clutch starts and I think Mitsu put emphasis on this with the weaker-than-JDM US version of the clutch.

I also feel that they took the idea a bit too far and ended up shafting the US market with a clutch that's way below the strength it should be for this car.

Mitsu has never really been known for their clutch/tranny strengths. My 97 Eclipse had a vague feeling clutch which slipped on me profusely under hard starts. It was just the nature of the (stock) beast, unfortunately. The whole reason we know about the clutch line and restrictor mod is because DSM guys have been doing it on the Eclipse for years.
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Old Jan 29, 2004 | 02:09 PM
  #20  
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JDM stock clutches are different than ours? I've never heard anyone talk about JDM Evo8 clutches.
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Old Jan 29, 2004 | 02:59 PM
  #21  
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From: MD
who can give me instructions for removing the clutch line restictor or pill or whatever.
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Old Jan 29, 2004 | 04:10 PM
  #22  
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My clutch is fine, but Im still replacing it. My Evo has done donuts, 4 wheel spins and general abuse. Overall, its held up fine. Im still going with a Cusco carbon unit.
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Old Jan 29, 2004 | 05:00 PM
  #23  
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Hahaha- this sucks I just typed up a HUGE response but then I lost my connection ... and everything I typed (but I'm on free wireless in a cafe in Westwood by UCLA so I can't complain )

Anyway, be happy as I'll now hyper-abbreviate everything.

DISCLAIMER, AGAIN: I *KNOW* these cars were built for track use, and *NOT* burnouts, donuts, or drag launches ... still it's nice to know for the occasional "FUN."

(1) Today in my Mustang I was making a very illegal U-turn on Sunset Blvd in West Hollywood; I realized I wasn't going to make it so I revved it and droped the clutch, torquing myself around. It would suck to lose this ability with the EVO ... is it even possible with 4WD? Or does it feel like FWD when you try to torque-around?

(2) If I'm to understand correctly, the simple truth is that the whole tranny system (clutch, gearbox, etc) is jsut plain junk? So if you use it hard, it WILL fall apart? *sigh* Because that really sucks. I mean really it sounds like either the clutch must give, or the gearbox itself. That's horrible. My crap Mustang (I love her to bits, but come on ) has held together fine!! And I've quite frankly never heard of such fragile transmissions before.

(3) I don't remember ... mmm ... I'll think of it later.
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Old Jan 30, 2004 | 03:59 PM
  #24  
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Does anyone know how to remove the restrictor or not?
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Old Jan 30, 2004 | 04:13 PM
  #25  
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There's a write-up I think, I searched for it and found it a while ago...just search for clutch restrictor

I'm an everyday driver, and even when I gun it I engage first normally then just romp on it, trying to save the clutch and using the turbo to catch up. I've never "launched" it. Do you guys think drivers like me need to worry about it going out?
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Old Jan 30, 2004 | 10:37 PM
  #26  
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Originally posted by treffner
Does anyone know how to remove the restrictor or not?
Remvoe the clutch line from the slave cylinder (10mmX1). Remove the slave cylinder from trans (12mmX2) look at where the line went into the slave you will see a small black rubber piece, pull it out with a paperclip, remove the spring under the rubber piece also. Put it in a ziplock bag(both the rubber piece and the spring this is the restictor) put the slave back on and clutch line and bleed the clutch! You may need to remove the intake box to make this easier to do. (10mmX2)
There you have it.

Ok I did this mod and I tookit to the track and it held for the 1st pass and on the second it smoked the clutch. 1.8 60 1st and a 2.1 on the second try with 45 min cool down between runs. I have been launching AWD cars before most of you out of High school. (8 years) So I know how to launch the car. The clutch just SUCKS on the EVO and my GSX. I will put a ACT in the EVO soon. I run a ACT 2600 in my GSX and LOVE it! 1.7 1.6 60' all day long on a Street disk!
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Old Jan 30, 2004 | 11:03 PM
  #27  
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Originally posted by ScoobyBoost
Do the SS clutch line mod, and remove that restrictor. I can't say enough good things about this. It really does make a huge difference. After I did this the clutch felt much closer to my Supra, (which has an ACT street clutch) in terms of solid engagement and holding on harder launches.

As always though, the best performance upgrade for your money is the good driver mod.

yes get the ss clutch line but DON"T REMOVE the restrictor...... It will mess up the clutch...
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Old Jan 31, 2004 | 12:29 AM
  #28  
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did this for a reason.....Transmissions are warrantied....clutches are not


if you have a good clutch you'll most likely **** up your tranny and then you'd get a new one free from

they purposly gave weak clutches because they are not under warranty and you'll have to pay for them and they wont have to give you another tranny

i had a long discussion about this topic with a bunch of people i race around with tonight..
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Old Jan 31, 2004 | 01:23 AM
  #29  
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Just how many people have broken their trans here? I have one of the sorryest MITS trans you can have (2g AWD) with over 500 hp and 150 launches on it and I do not break the trans with a 2600 ACT in the car. Removing the restrictor will not break the trans. I do not know where you guys base your info on. The Evo trans is stronger than any other DSM trans out there. This thing come with a 4 spider center diff already. That is one of the 1st things to go in a high power AWD car. The 90-99 DSM had 2 spider diffs and people would break them left and right, then they would either weld it or 4 spider it and never look back. ( mine is welded) (I did break my center diff but nothing else)
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Old Jan 31, 2004 | 07:14 AM
  #30  
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Originally posted by evoVIII_4g63

i had a long discussion about this topic with a bunch of people i race around with tonight..
There you have it. Case closed.













jk

In reality, the real problem IS the restrictor and clutch line. ACT tested our clutch agaist the sti's, and OURS GOT THE NOD. In other words, don't launch it, match revs, slip as little as possible, and it's a good clutch. If not, you have to pay to play.
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