Clutch renewal change flywheel type or not?

id101

id101

Zorg Addict
Joined
Dec 13, 2017
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I'm thinking about a clutch renewal, not sure if i need it yet as i dont seem to get slippage, but if i dump the cluthc for a quick start i dont go anywhere, i think it might be not dumping the clutch properly and an over zealous traction control as its not so bad when turned off.

Anyway if its the beginning of the end for the clutch when replacing it all I see kits that convert from dual mass flywheel to single mass flywheel could anyone educate me on the differences please and/or any clutch/flywheel recommendations?

Cheers :)
 
Sounds like you're trying to get the back wheels spinning on take off. If I try that on mine it just cuts the engine. Traction control. Nothing to do with clutch.
 
Duncodin said:
Sounds like you're trying to get the back wheels spinning on take off. If I try that on mine it just cuts the engine. Traction control. Nothing to do with clutch.
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yeah i thought it was too and with dsc off it does seem better but not always
 
anyway onto flywheels why would anyone want to change from dual mass to single mass?
 
the Nefyn cat said:
Anyone else remember a time when all flywheels were single mass, and yet we managed to drive quite happily? Pah, nostalgia ain't what it used to be.
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Probably because cars like for instance the RS2000 a quick car in its time had a mere 90bhp
 
I'm pretty sure I remember plenty of cars from my younger days had way more than 90hp, and no trouble getting by on a solid flywheel. Not just cars, either, lorries, even these things.
Centurion.webp


27 litre Meteor engines not known for their lack of torque. I could get all pedantic and go on about how it's torque that matters, not hp, but that's a whole different story.
 
Don't forget chaps there's also a clutch delay valve that restricts the fluid flow when you try to dump the clutch. Remove this first and along with the ASC/DSC off you should get a sharper launch.
 
Pingu said:
Acceleration, but only because single mass tend to be "lighter" than dual mass.

There are downsides. More noise, more vibration, less protection for the gearbox and diff.
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More noise, like gear whining noises? That would be a win for me as I love those mechanical type noises. Like old minis with straight cut gearboxes!
 
id101 said:
More noise, like gear whining noises? That would be a win for me as I love those mechanical type noises. Like old minis with straight cut gearboxes!
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I ran a single mass on my 2.8 Z3. Didn't really get any noises but I did get a little more vibration sat at idle. I had a heavy sprung clutch disc to suit and it was brilliant fun on track.
 
Where I used to work they started running Ford Transits on 51 plates. Only after a couple of years the cutches started to fail. Manufacturers very soon produced single mass flywheel and clutch kits to replace them with. These were more robust and proved to last longer.

Tony.

ps. Personally I would replace "like for like".
 
id101 said:
More noise, like gear whining noises? That would be a win for me as I love those mechanical type noises. Like old minis with straight cut gearboxes!
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The more noise is the gearbox chattering. There is always play between the teeth (backlash). The springs in the clutch hold the mating faces together and prevent the backlash from lashing back. As the springs in a SMF are much lighter, the backlash can lash back / chatter.

Straight-cut whine is caused by the contact surface being so small and moving quickly across the contact surface. Helical gears have a much larger surface area, and the cog is meshed for longer. The downside to helical gears, as well as being less efficient, is the bearings have to absorb axial and radial forces, straight-cut only radial.

Straight-cut sounds awesome, though :)
 
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