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Old 09-02-2014, 09:59 PM   #1
dleberfinger
Scooby Newbie
 
Member#: 368808
Join Date: Sep 2013
Chapter/Region: Tri-State
Vehicle:
1997 Impreza L
Black

Default Higher clamping pressure plate or a new clutch?

I have a 97 Impreza sedan that previously had a 2.2 engine in it. It currently has the stock 5 speed until it blows up. I typically drive this car like I stole it and the only issue I've had so far, aside from the fact that it's a dog, is that my clutch/pressure plate can't seem to keep up with the flogging I give it. This is more or less a toy to blast and drift down back country roads and tear up gravel.

My main problem is when I do any sort of aggressive start, like a 3-4k drop, the clutch just slips for a long while before catching up to the engine speeds, even in gravel or loose dirt. I realize that this is destroying the clutch and I would like to have a more responsive ride.

I am in the process of building a hybrid high compression motor using a 2.5 bottom end with the 2.2 heads along with a PnP and a new cam grind. This new engine should have a substantial amount more power and torque than the stock 2.2 and I'm afraid my issue is going to becoming substantially worse.

I was told the stock clutch is good to 250-300 ft/lbs, however I don't know if this is a newer clutch they are talking about or just all in general. I have read over the clutch and flywheel stickies however I would like some more input on the subject.

That being said, would I be ok to continue using the stock clutch if I upgrade my pressure plate? Should I buy an upgraded clutch or just a stock clutch from a newer vehicle? Any advise or words of wisdom would be greatly appreciated.
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Last edited by dleberfinger; 09-02-2014 at 10:45 PM.
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Old 11-03-2014, 05:49 PM   #2
idrivea911
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Member#: 380935
Join Date: Feb 2014
Chapter/Region: MAIC
Vehicle:
1997 Impreza L 2.2
White

Default

I also have a '97 2.2, driven the same, with very similar sounding clutch slippage. Rev ... slip ... let off for a sec ... grab ... accelerate. So I'm looking for the same info.

I wouldn't mind diving into replacing the clutch as a feeler project to see if I have the DIY chops for a [stock] 2.5L swap. From a brief look at rockauto, the part numbers for Exedy clutch kits: 1997/98 2.2L is #15010, or 1998 2.5RS is #15015. The P/Ns are different, but the specs look the same: 225mm Dia, 24 tooth spline. Does anybody know if the 2.5 clutch is actually different?
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Old 11-03-2014, 06:00 PM   #3
Uncle Scotty
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Member#: 16200
Join Date: Mar 2002
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OK Houston
we have an Uncle

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sometimes the rear main seal can leak just a LITTLE and contamimate the disc

and sometimes when a clutch is at its very end...the rivets will be the last thing to grab before the car wont move again and this is how it might tell you that the rivets are grinding the flywheel
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Old 11-14-2014, 11:33 AM   #4
idrivea911
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Member#: 380935
Join Date: Feb 2014
Chapter/Region: MAIC
Vehicle:
1997 Impreza L 2.2
White

Default

From Exedy e-mail: "The 15015 has roughly a 20% increase in clamp load over the 15010. The mounting is the same.

Sincerely, Evan Cline
Technical Coordinator Aftermarket"
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