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Turbo Phil

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My sister is so fit I won't show anyone her picture

Lake District

11th Mar, 2009 at 01:50:40pm

On 11th Mar, 2009 Jay#2 said:
So it's all about the position of the diaphram spring?


Yes it wants to be flat to get maximum clamping force.

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turbodave16v
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SouthPark, Colorado

11th Mar, 2009 at 01:52:13pm




On 11th Mar, 2009 jukka said:
Dave, is your clutch package something like the pics I sent you a couple of years ago ?


Not at all in the end... I don't know how well that worked, but I needed something with a larger diameter spring to give the release bearing loads and clamping pressure I wanted to achieve. Ths size of the spring in that one you showed me would not have provided this.

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY



turbodave16v
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SouthPark, Colorado

11th Mar, 2009 at 02:01:09pm

Phil makes a point about the spring being flat - especially as the latest MS plates are thicker than the 'old standard' of mini clutch plates, hence if you just machined to 24mm as I used to tell folks I did to my flywheel a decade ago probably would open up a can of worms...

Getting the spring flat is not actually the full story either if we want to be really anal. It is basically a belville spring - force doesn't just go from 1200 to 300lb over 0.1mm... The force can start to decay before it is flat or 0.5mm over centre - it all depends on the INDIVIDUAL characteristics of the spring in YOUR cover. Even a grey from 2006 could have a different setting to a grey made in 2008

The only real way to know, is to measure the force/deflection of YOUR cover, and decide where the optimal point to set the pre-load is - you might find it is 1mm over centre' or even 1mm before it gets there.

Edited by turbodave16v on 11th Mar, 2009.

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY



matty

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Aylesbury

11th Mar, 2009 at 08:48:50pm

My grey diaphragm/organic plate setup was only good for about 8psi then slipped like a bastard!! Im going for a twin turbo spring verto with 190mm plate now..If that slips im fucked! *hehe!*

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1/4mile in 13.2sec @ 111 terminal on 15psi
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