Super Stiff Clutches?
06-12-2019, 02:26 AM
#16
I see what you are saying, thanks.
I don't suspect a typical sport clutch (I think Sachs makes one) would be too harsh on a daily driver or lead to excessive wear. Only my opinion though, no facts to support it.
When I had a heavily sprung clutch, it also had a four puck Kevlar clutch disk with no springs. It had two modes - on and off. Combined with a lightweight flywheel, it grabbed immediately, there was no dampening, and very little mass, so it was very tricky to relearn taking off from a standstill. It also had a supercharged engine from another model, a sturdier gearbox and a quaiffe did. I suspect the wear in that case happened in all kinds of other places in the driveline.
I don't suspect a typical sport clutch (I think Sachs makes one) would be too harsh on a daily driver or lead to excessive wear. Only my opinion though, no facts to support it.
When I had a heavily sprung clutch, it also had a four puck Kevlar clutch disk with no springs. It had two modes - on and off. Combined with a lightweight flywheel, it grabbed immediately, there was no dampening, and very little mass, so it was very tricky to relearn taking off from a standstill. It also had a supercharged engine from another model, a sturdier gearbox and a quaiffe did. I suspect the wear in that case happened in all kinds of other places in the driveline.
but in reality, Ill be lucky to even get the Diff
06-12-2019, 02:33 AM
#18
Race Car
Some run a LWFW and take the risk but its not recommended. Previous owner put one in my car I removed it.
06-12-2019, 03:06 PM
#20
Rennlist Member
Don't use a pressure plate stronger than necessary to hold the torque/power of the engine. The 3.4 uses about 1600 lbs pressure, the 3.6 about 1800 lbs, the 3.8s use about 2100 lbs.
When the clutch pedal is depressed, the pressure needed to release the clutch disc is countered directly by the thrust bearing in the center of the crankshaft. ( the small half-moon shaped plain bearings) . These bearings keep the crankshaft from moving forward and backward, the force from the clutch is directly applied to the bearing on the clutch side. Increasing the pressure above what is needed to hold the torque/power adds unnecessary wear/pressure to the thrust bearings. Also never sit at traffic lights for long periods of time with the clutch depressed.
The helper spring in the dash does not increase/ decrease the actual pressure exerted by the clutch, it only effects the "pedal feel" and is installed to make clutch release effort less.
It is also worth noting that a soft engagement is also very easy on the drivetrain. I have seen aggressive clutch discs along with high pressure plates bust gears in the trans on quick shifts. A soft engagement or slight slip is a good thing here.
When the clutch pedal is depressed, the pressure needed to release the clutch disc is countered directly by the thrust bearing in the center of the crankshaft. ( the small half-moon shaped plain bearings) . These bearings keep the crankshaft from moving forward and backward, the force from the clutch is directly applied to the bearing on the clutch side. Increasing the pressure above what is needed to hold the torque/power adds unnecessary wear/pressure to the thrust bearings. Also never sit at traffic lights for long periods of time with the clutch depressed.
The helper spring in the dash does not increase/ decrease the actual pressure exerted by the clutch, it only effects the "pedal feel" and is installed to make clutch release effort less.
It is also worth noting that a soft engagement is also very easy on the drivetrain. I have seen aggressive clutch discs along with high pressure plates bust gears in the trans on quick shifts. A soft engagement or slight slip is a good thing here.
06-12-2019, 08:19 PM
#21
Rennlist Member
My 996 appear to have lots of slip if driven incorrectly (slamming the clutch closed with WOT when RPMs are not matched). My friend doing this type of driving was complaining that the clutch isn’t strong. I told him the 996 isn’t meant to be slammed around like that. My clutch never slips when I drive it, and it behaves very smooth and feels great otherwise.
06-12-2019, 09:41 PM
#22
Rennlist Member
My 996 appear to have lots of slip if driven incorrectly (slamming the clutch closed with WOT when RPMs are not matched). My friend doing this type of driving was complaining that the clutch isn’t strong. I told him the 996 isn’t meant to be slammed around like that. My clutch never slips when I drive it, and it behaves very smooth and feels great otherwise.
06-12-2019, 10:50 PM
#23
Rennlist Member
Lol, yeah, I think he was just quite inexperienced.