Twin plate clutch...
Turbo Mini Forums

I found this whilst looking for pics of a K1 head on a mini - I was trying to see how much my K1 16V head will protrude from the engine bay on a 1275 block as I’ve only ever seen it on small bore motors - JF, have you fitted yours yet, what the protrusion like?

"This is a very simple but effective idea, it uses two clutch plates with the one pressure plate. This gives you twice the grip without having a really heavy pedal from a strong pressure plate.

Mark said he never got it to slip even with his supercharged 1430"

http://www.minimod.info/mods.html
I'll let the discussion commence!

Hannibal: There are two ways we can do this: the easy way and the hard way. In a few minutes my friends and I are going to come down on you like your worst nightmare. You're gonna wish the Earth had opened up and swallowed you whole.
bad guy: What's the easy way?
Hannibal: That WAS the easy way.

no it dosn't give twice the grip , it gives you twice the wear ,its the same preasure clamping . there may however be a little more grip available by virtue of less heat build up in each plate ,then again may not ..

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Mmm, see what your saying. I must admit that I can see little advantage myself!

choppo

Hannibal: There are two ways we can do this: the easy way and the hard way. In a few minutes my friends and I are going to come down on you like your worst nightmare. You're gonna wish the Earth had opened up and swallowed you whole.
bad guy: What's the easy way?
Hannibal: That WAS the easy way.

http://www.minimania.com/web/threadid/7434...1/msgthread.cfm


yawn, How old...

'cor blimmy your a grumpy git TD!

Just trying to shed some info with some chaps who might find this interesting.

Hannibal: There are two ways we can do this: the easy way and the hard way. In a few minutes my friends and I are going to come down on you like your worst nightmare. You're gonna wish the Earth had opened up and swallowed you whole.
bad guy: What's the easy way?
Hannibal: That WAS the easy way.

Isnt there more friction area which would mean less slip as in a motorcycle setup there are no strong springs on most 160bhp bike engines but loads of plates usualy 8 or 9 ish.
ps I may have missed somthing.

http://www.rabdunn.co.uk/

Thats what I was thinking, esp' as most multi plate 'bike clutch's reside in oil!

My mate's SP1 has loads of clutch plates, as does a couple of my mates x'ers, but I wouldn't have tought they produce much torque?

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Hannibal: There are two ways we can do this: the easy way and the hard way. In a few minutes my friends and I are going to come down on you like your worst nightmare. You're gonna wish the Earth had opened up and swallowed you whole.
bad guy: What's the easy way?
Hannibal: That WAS the easy way.

two plates will handle more torque.... in theory!

Alex

AlexF

twice the surface area innit!

Hannibal: There are two ways we can do this: the easy way and the hard way. In a few minutes my friends and I are going to come down on you like your worst nightmare. You're gonna wish the Earth had opened up and swallowed you whole.
bad guy: What's the easy way?
Hannibal: That WAS the easy way.

They'll hold the torque, but once both plate have worn just 1mm (0.5mm per friction surface) you'd be better off with a stock verto clutch...

In theory, you'd only need an orange at most.
Theory works well on paper. I'm not pursuing this anymore for the wear and inertia reasons.

oh - plates also have to be modified...

would it not be worth looking at untill someone sorts the verto setup?

Alex

AlexF

I was thinking along the lines of twice as much surface area mus be able to hold twice as much torque (or the same torque with half the clamping force).

But evidently the laws of physics say no, for example a sintered plate with pucks has somewhere around half the surface area but holds around the same torque as a ordinary plate.

perhaps this link will explain beter than me.

http://forums.freshalloy.com/ubbthreads/pr...22518&type=post

It's nothing to do with area at all - friction is dimensionless (has no units). Hence you could take an organic plate and chop 90% of the material away - and it'll still hold the same torque.

Cerametallic / sintered plates have a higher co-eff of friction than organic plates - that's why they have an ever-so slightly increased torque capacity.

To all intents; given the same clamp load, a twin-plate (with four friction couples) will have twice the torque capacity of a single-plate (with two friction couples).

The formula to calculate the maximum torque transmitted is:

Frictional faces x Coefficient of friction x spring force (N) x mean radius (m).


Alex

AlexF

A f1 car uses a cluth approx the same as a 500cc suzuki quad bike...fact

Metro turbo weekend driver,Mini turbo in the making again!

yeah but dont they also have hydraulic computer controlled actuation, and so can be stupidly heavily sprung?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.