ACT PP - how does it effect the clutch pedal?
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From: Queen City, NC
Originally Posted by SpitfireS,Mar 17 2010, 02:54 AM
There was a topic about the ACT a while back - the main question was about the possibility of extra wear on the thrust bearing using the ACT in the F20/F22 - and as far as I remember ACT changed the spring.
Maybe the clutch pedal travel was reduced as well?
(I'm not saying anythihg is wrong with the "old"ACT's but IIRC it was a refinement of geometry, resulting in slightly less clamping but much less disengaging force - something like that)
Was it a new ACT, as in recently produced?
If the whole clutch setup was lubed well, fresh fluid and all, the stronger spring can make it feel like an on/off switch I guess.
Maybe you just need to get used to the stronger spring?
Was it an OEM disk too?
Maybe the clutch pedal travel was reduced as well?
(I'm not saying anythihg is wrong with the "old"ACT's but IIRC it was a refinement of geometry, resulting in slightly less clamping but much less disengaging force - something like that)
Was it a new ACT, as in recently produced?
If the whole clutch setup was lubed well, fresh fluid and all, the stronger spring can make it feel like an on/off switch I guess.
Maybe you just need to get used to the stronger spring?
Was it an OEM disk too?
I'm not concerned with the pedal pressure, after driving German cars, nothing compares imo, it was just the whole set up was so different, I figured I'd get some more input.
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camuman Posted on Mar 17 2010, 05:34 PM
Yes.
Thrust washer.. thrust bearing.. same thing IMHO.
#3
These bearings are not below oil level.
When the engine is running they get lubed by the oil pump via the crank (I guess).
I don't think they have to rely on oil drainig down from the top end for their lubrication / cooling.
edit: see this thread:
https://www.s2ki.com/forums/index.ph...=772436&st=225
When you start the engine they get lubed as soon as the oil is there.
When you press the clutch pedal and keep it pressed before you start the engine there is no oil pressure, when you then start the engine you IMO get more wear because for a short time its an unlubed loaded bearing.
Imo its not like a crank shaft journal (bearing) where a thin oil film is enough.
Saki GT Posted on Mar 17 2010, 05:43 PM
What about the clutch disk?
Very important in clutch engagement.
Agressive disks can make the clutch an on/off switch.
What do you mean with "tumble"?
Like a threshold?
You press.. press.. press (nothing happens) until you reach the threshold and it all happens?
thrust washer i think is what he is talking about.
Thrust washer.. thrust bearing.. same thing IMHO.
#3
These bearings are not below oil level.
When the engine is running they get lubed by the oil pump via the crank (I guess).
I don't think they have to rely on oil drainig down from the top end for their lubrication / cooling.
edit: see this thread:
https://www.s2ki.com/forums/index.ph...=772436&st=225
When you start the engine they get lubed as soon as the oil is there.
When you press the clutch pedal and keep it pressed before you start the engine there is no oil pressure, when you then start the engine you IMO get more wear because for a short time its an unlubed loaded bearing.
Imo its not like a crank shaft journal (bearing) where a thin oil film is enough.
Saki GT Posted on Mar 17 2010, 05:43 PM
the combination of light flywheel, aggressive pp, and gears made the car alien to me.
Very important in clutch engagement.
Agressive disks can make the clutch an on/off switch.
What do you mean with "tumble"?
Like a threshold?
You press.. press.. press (nothing happens) until you reach the threshold and it all happens?
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From: Queen City, NC
Yup, threshold. Like with a Corvette (or any large engine), you can pretty much just let go of the clutch and the car will start moving. Its similar with an AP2 because of the heavy flywheel, but the threshold is much more compressed with the car I drove.
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