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Porsche Crest Stiff clutch

The clutch pedal on my 930 Slant is really stiff, and it makes driving through traffic really difficult as well. I may have it to get to a shop sometime to adjust it. My car does have a 935 pressure plate, but is it actually normal for a 935's clutch to be this stiff?

Thanks,
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-02-2014, 05:12 PM
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It's not a Honda. Has the stiffness changed recently?
Old 03-02-2014, 05:46 PM
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Quote:
Originally Posted by DSPTurtle View Post
It's not a Honda. Has the stiffness changed recently?
No, the clutch pedal's been stiff since I bought it. It didn't get any looser or stiffer.
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-02-2014, 05:56 PM
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Based on your power level stated, it is likely the car has a Sachs 594 pressure plate which would make for a very stiff clutch pedal.

Chris.
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Old 03-02-2014, 07:21 PM
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Quote:
Originally Posted by Hams930T View Post
Based on your power level stated, it is likely the car has a Sachs 594 pressure plate which would make for a very stiff clutch pedal.

Chris.
Is there any way to adjust it or should I leave it like that?
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-02-2014, 07:31 PM
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You can only adjust the engagement. You would have to change the whole pressure plate and clutch to get a softer pedal. But in any case its just a guess. The Sachs 594 plate is made to hold around 580tq and what you'd find in a "935" package.

Chris
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Old 03-02-2014, 07:35 PM
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Quote:
Originally Posted by Hams930T View Post
You can only adjust the engagement. You would have to change the whole pressure plate and clutch to get a softer pedal. But in any case its just a guess. The Sachs 594 plate is made to hold around 580tq and what you'd find in a "935" package.

Chris
Then I guess I'll leave the way it is in that case, thanks!
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-02-2014, 07:40 PM
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How much power are you making? 935 might be overkill. Regardless, it's a cable clutch so it's much stiffer and more effort than the sexy new hydraulic clutches.
Old 03-02-2014, 08:08 PM
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Quote:
Originally Posted by DSPTurtle View Post
How much power are you making? 935 might be overkill. Regardless, it's a cable clutch so it's much stiffer and more effort than the sexy new hydraulic clutches.
My car makes 545 hp at 1.25 bar (about 18 psi) of boost
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-03-2014, 05:21 AM
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odd your car would retain the OE exhaust w/ that kind of throughput?
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| '01 ///M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 03-03-2014, 05:28 AM
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Quote:
Originally Posted by krasuskyp View Post
odd your car would retain the OE exhaust w/ that kind of throughput?
Well actually, I've always thought my exhaust was custom-built, but if it is the stock exhaust, how could you tell?
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-03-2014, 05:38 AM
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sorry - I was just going by the appearance of the tail pipe that I thought I'd recalled seeing in one of your pics you'd posted. I could be wrong...
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Paul... CT | '87 930 | '07 //S6 v10 JNR | '98 ///M3 vert |
past:

| '01 ///M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 03-03-2014, 05:41 AM
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Quote:
Originally Posted by krasuskyp View Post
sorry - I was just going by the appearance of the tail pipe that I thought I'd recalled seeing in one of your pics you'd posted. I could be wrong...
Oh. Well, my exhaust has only one pipe and not two like the factory exhaust does. The headers are also different as they're not equipped with the factory mufflers as my car has only one main muffler.
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-03-2014, 05:54 AM
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FYI

If the throwout bearing guide tube is not properly greased, it can make for an extremely stiff clutch. Like other things in life, proper lubrication is necessary for smooth action.
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Old 03-03-2014, 06:10 AM
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d'oh my bad Jason, got your car confuzed w/ another pic I'd seen - could have sworn I saw OE double tip on one of your pics - sorry 'bout that

clutch stiffness is also very subjective... does your left leg start to start pulsating when you hold it in @ a light?

Hook up w/ Chris since he's local to you and try his... tho... forget what clutch he runs. But compare it to an OEM one and another aftermarket one if you can and go from there...
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Paul... CT | '87 930 | '07 //S6 v10 JNR | '98 ///M3 vert |
past:

| '01 ///M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 //S8 | '95 //S6 6gang | '88 ///M5 | '87 190E 2.3-16 |
Old 03-03-2014, 06:15 AM
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Check the clutch pedal return spring .
Old 03-03-2014, 06:19 AM
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Quote:
Originally Posted by jwasbury View Post
FYI

If the throwout bearing guide tube is not properly greased, it can make for an extremely stiff clutch. Like other things in life, proper lubrication is necessary for smooth action.
I don't really mind the stiff clutch, but in public it would often wrongly accuse me of being a "beginner" as I still haven't gotten used to applying the correct amount of throttle, and having had years of experience driving cars with manual transmissions, it seems a little embarrassing. I usually don't stall the engine doing so, but I do cause it jerk about since my car does not like to be driven slowly.
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-03-2014, 06:20 AM
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There is a clutch pedal return spring in the pedal cluster under the floorboard. They are known for sometimes rusting and breaking in some cars. If it's broken the clutch pedal will be harder to press down.
The 930 spring in no longer available but an SC spring will work.
Some people weld the original 930 one back together if it broke and there's enough left to weld.

I doubt you'll really know what clutch is in your car unless you remove it. A 935 clutch would be expensive and there are better alternatives available.
Old 03-03-2014, 06:41 AM
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Quote:
Originally Posted by krasuskyp View Post
d'oh my bad Jason, got your car confuzed w/ another pic I'd seen - could have sworn I saw OE double tip on one of your pics - sorry 'bout that

clutch stiffness is also very subjective... does your left leg start to start pulsating when you hold it in @ a light?

Hook up w/ Chris since he's local to you and try his... tho... forget what clutch he runs. But compare it to an OEM one and another aftermarket one if you can and go from there...
That's okay.

Well, it's not exactly painful to disengage the clutch, but in fact, the clutch is so stiff it'll give you a cramp if your legs aren't "in shape".
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Jason

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 03-03-2014, 06:51 AM
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We should link up sometime so I can test yours out. I can tell you if you have the 594 pressure plate or not.

You're welcome to try mine and note the difference. I personally am using this setup from Patrick Motorsports: 930 Lightweight Flywheel & Clutch Conversion Package

Except that I am running their billet 60-2 flywheel for EFI.

You're welcome to test it out and see the difference.

My clutch return spring is intact but the pin that it connects to at the pedal broke - so I have no return spring. I need to fix it...

Chris.
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Old 03-03-2014, 07:38 AM
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