6 Speed and 4 Puck Unsprung
03-30-2009, 01:38 PM
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6 Speed and 4 Puck Unsprung
So, over the weekend, I installed a 6 speed with a 4 puck unsprung clutch and a 2000lb pressure plate. Overall, it was easier than the first clutch job I did on the car but, it was still a major bitch. My impression afterwards is, 1st is useless (I expected that). I find myself crusing in 5th then realizing there is still one more gear. The 4 puck is amazing. It grips so hard. The only eye candy I have however, is this: (yes, that's my crotch)
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03-30-2009, 11:09 PM
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I've not driven it in traffic and hopefully i never have to. It's not a DD. However, if i was caught in traffic, i could probably do it. It just takes a light foot on the clutch and knowing right where the engagement point is. It will slip, you just have to know how to do it.
I have heard that the springs are there to dampen the torsional vibrations. I originally thought that drivetrain stress was the issue but as I read more stuff on it, I find that a lot of people say the springs are there to reduce chatter/noise. The rotation of a piston engine is not smooth, it is jerky. This results in torsional vibration.
http://www.turbomagazine.com/tech/04...ics/index.html
I have heard that the springs are there to dampen the torsional vibrations. I originally thought that drivetrain stress was the issue but as I read more stuff on it, I find that a lot of people say the springs are there to reduce chatter/noise. The rotation of a piston engine is not smooth, it is jerky. This results in torsional vibration.
T: What's the difference between a sprung and unsprung center hub?
S: For a traditional flywheel design (not dual mass), springs are placed in the center of a clutch disc to reduce transmission noises caused by the torsional vibrations (rotational pulses) of the engine. A spring center disc will operate quieter and reduce wear on the center splines of the disc. A rigid center disc, being lighter, will shift faster, engage smoother with high-friction materials, and avoid spring failures. They're race parts and aren't intended for high-mileage applications, since the splines tend to wear out prematurely from the vibration.
Torsional vibration will increase with fewer cylinders, higher compression, hotter cams, higher boost, timing, lighter flywheel, or many aftermarket harmonic balancers.
S: For a traditional flywheel design (not dual mass), springs are placed in the center of a clutch disc to reduce transmission noises caused by the torsional vibrations (rotational pulses) of the engine. A spring center disc will operate quieter and reduce wear on the center splines of the disc. A rigid center disc, being lighter, will shift faster, engage smoother with high-friction materials, and avoid spring failures. They're race parts and aren't intended for high-mileage applications, since the splines tend to wear out prematurely from the vibration.
Torsional vibration will increase with fewer cylinders, higher compression, hotter cams, higher boost, timing, lighter flywheel, or many aftermarket harmonic balancers.
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03-31-2009, 12:42 AM
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On a side note, What do you do with your car? Ever go to the drag strip? I wanna see it.
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