Valeo Xhd High Perf Clutch Kit

[Guest]

Dont think many organic clutches would stand up that sort of abuse for long.

Street car driven every day with a track day now and again = organic

Strip weapon that's not driven in traffic every day =ceramic

Its a hard choice when it falls in between these two.

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There are other options

Street car driven every day with a track day now and again = Cerametallic

Strip weapon that's not driven in traffic every day =ceramic / Twin Plate

D.

Edited 11/12/06 02:47 AM by Darren

[WBT56]

Dont think many organic clutches would stand up that sort of abuse for long.

Street car driven every day with a track day now and again = organic

Strip weapon that's not driven in traffic every day =ceramic

Its a hard choice when it falls in between these two.

←

There are other options

Street car driven every day with a track day now and again = Cerametallic

Strip weapon that's not driven in traffic every day =ceramic / Twin Plate

D.

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This is why Mal Wood offer such a range of clutches. You have to remember that the option three is an 11" unit, not a 10.5" as shown in the first picture. The increase in capacity is huge. The highest output "T" that is running an option 3 that I know of has done 40 laps of Sandown with 440rwkw. Others in the V8 application have run a full season of GT/P with an organic. Option four is a 11" cera-metallic, option five is a 10.5" organic twin that we have holding 580rwkw turbo V8, and option six is the 9.5" carbon twin. Clutch selection is done on a case by case basis, and in a daily driver you steer away from exotic material unless there is no other option.

As far as capacity goes, I challenge anyone to get a cover like the blue one shown out to 70% above std CLAMP PRESSURE. You will find that a lot of the entry level clutches are actually rated at % increase in clutch capacity, even if they are not worded as such. Therefore, they might have a std replacement (non OE) pressure plate that is 15% above std clamp, and they then calculate the increase in total capacity as a factor of this increase in clamp, and the increase in friction co-efficient by using metal pads. The one shown is just the "brass button" of old, and should not be used in a road registered car. Ben.

[Guest]

Ladies and Gentleman,

No truer words could have ever been spoken, then those written above. In addition to the above, dont look at just 'clamp pressure' to guage the capacity of a clutch.

The clamping capacity of a Clutch Pressure plate will change, all depending upon the materials used to within a the Clutch Plate.

For Example.

Heavy Duty Pressure plate, with an organic clutch plate will provide = X amount of clamp.

Heavy Duty Pressure plate (same as above) with riveted cerametallic buttons on a rigid plate = Y-Z amount of clamp.

As it stands, the best comprimise, in terms of drivebility (shudder, chatter, peddle feel and modulation), and over all increased capacity (torque, HP, Co-efficient friction, clamp) is found in what they now call a 'Cushioned Button'

'Cushioned Button' is a sprung centre type clutch plate, with cerametallic friction material bonded to a backing plate. Due to dampening used betweeen the backing plates, modulation is improved.

This type of clutch plate is or will gradually become the step between a Organic clutch plate and a sprung centre button type clutch. A degree of harshness is to be expected with this type of plate, but FAR FAR, easier to live with, that non-slip, in or out, button types.

Cushioned button: <div class='bbimg'>

</div>

There have some very intersting concepts regarding the combining of various certain materials, to maintain drivability, and up the capacity. Already available in 4WDs, in the not too distant future, performance vehicles may have an option as whats shown below.

COMING SOON TO A PEDDLE NEAR YOU!

Cheers

D.

Edited 11/12/06 01:49 PM by Darren

[WBT56]

....There have some very intersting concepts regarding the combining of various certain materials, to maintain drivability, and up the capacity. Already available in 4WDs, in the not too distant future, performance vehicles may have an option as whats shown below.

COMING SOON TO A PEDDLE NEAR YOU!

Cheers

D.

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Re the clutch design shown in this link, Clutch Industries had better be VERY careful about advertising a "unique design". It was unique when it was released in the mustang cobra terminator by Ford Motorsport US more than four years ago, now pretty well accepted as being a flawed theory, a bit like putting wets on one side of your car and slicks on the other and expecting it to handle all conditions. Ben.

[driftpig01]

The clutch shown above is a Exedy cushioned button.

http://www.exedy.com.au/products2.asp?type=sports%20tuff

[Guest]

The clutch shown above is a Exedy cushioned button.

http://www.exedy.com.au/products2.asp?type=sports%20tuff

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Yep, you are right, it is an Exedy 'cushioned button' hence why I included in the thread, to highlight what a 'cushioned button' looks like.

Regardless of manufacturer, cushioned button plates offer a liveable comprimise from an Organic - Button Type

D.

[Ralph Wiggum]

I have a cushioned button type clutch that Mal Woods supplied as part of his option four setup. The drivability is excellent. I occasionally get some shudder when taking off from the lights or on an incline but that usually because im not paying attention and driving it as i should. I find the quicker you are to release the clutch the better it engages.

my 2c's :yuck2:

im just waiting to win lotto so i can afford and option 6 from Mal....

[Guest]

....There have some very intersting concepts regarding the combining of various certain materials, to maintain drivability, and up the capacity. Already available in 4WDs, in the not too distant future, performance vehicles may have an option as whats shown below.

COMING SOON TO A PEDDLE NEAR YOU!

Cheers

D.

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Re the clutch design shown in this link, Clutch Industries had better be VERY careful about advertising a "unique design". It was unique when it was released in the mustang cobra terminator by Ford Motorsport US more than four years ago, now pretty well accepted as being a flawed theory, a bit like putting wets on one side of your car and slicks on the other and expecting it to handle all conditions. Ben.

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Im sure Clutch Industries has made sure that all I's have been dotted and t's crossed.

I understand the 'concept' has been around for a little while, but what is 'unique' to Clutch Industries and their '4Terrain' clutch kits, is how they have formulated the materials they have chosen, and applied them to remedy issues found normally in 4WD's like below.

1. Shudder

2. Chatter (high compression engines, like Turbo Diesels)

3. 50% Reduced Fade

4. Anti Burst

5. Excellent modulation (when issues of shudder are solved)

The results speak for themselves, not only have they rigoursly engineered, and designed these 4Terrain Kits, but they have the facilities to accurately 'TEST'

How it can so easily be said, that this theory is 'flawed'? Perhaps it may of been in that Mustang Cobra Terminator, but say in this...

What you (and others) may think is flawed, they design, engineer, test, test and test again, to prove that it not only works, but works well.

D.

[F6 UTE]

What's wrong with an F6 clutch???

I am yet to be proven wrong that it's the best clutch available.

It's quieter than other twin plates on the market and mine has handles 65,oookm's of abuse from me. I have hardly ever had less than 300rwkw and the other day on a 65,oookm old clutch I hit a 1.6 60' at the drags.

That's dropping the clutch from 5000rom and it hooks up - time after time after time.

The car has seen copious drag days, track days and general street driving.

Yes it got 'hot' but 4 runs in an hour with 42 deg track temps will take it's toll on any factory item.

Upgraded discs are available for them and Simon from Extreme is running those, aswell as every other customer of his making more than 330rwkw ( Other than me )

The amount of development AP went thru with the fix/refinement is second to none.

It is simply the best clutch available imo..

[Fat-Tony]

What's wrong with an F6 clutch???

I am yet to be proven wrong that it's the best clutch available.

It's quieter than other twin plates on the market and mine has handles 65,oookm's of abuse from me. I have hardly ever had less than 300rwkw and the other day on a 65,oookm old clutch I hit a 1.6 60' at the drags.

That's dropping the clutch from 5000rom and it hooks up - time after time after time.

The car has seen copious drag days, track days and general street driving.

Yes it got 'hot' but 4 runs in an hour with 42 deg track temps will take it's toll on any factory item.

Upgraded discs are available for them and Simon from Extreme is running those, aswell as every other customer of his making more than 330rwkw ( Other than me )

The amount of development AP went thru with the fix/refinement is second to none.

It is simply the best clutch available imo..

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Problem for those who wernt lucky enough to get a F6 is the price