Larger diameter clutch slave.

Larger diameter clutch slave.

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Discussion

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Monday 15th February 2021
quotequote all
I'm aware by changing the slave to a larger bore it will lower the pedal presure .

Can It be improved even further by changing the clutch master cylinder with somthing of different design ?

jamieduff1981

8,025 posts

140 months

Tuesday 16th February 2021
quotequote all
If you do nothing else then you are guaranteed by basic engineering principles that either the stroke of the slave cylinder piston will reduce (potentially no longer disengaging the clutch) for a given pedal movement. To make a larger bore slave cylinder piston move the same linear distance to impart the same movement on the clutch fork, you will unquestionably have to displace more hydraulic fluid via the master cylinder, either from a longer stroke or a bigger bore (which in turn will require more force on the pedal to displace it).

magpies

5,129 posts

182 months

Tuesday 16th February 2021
quotequote all
I believe one or two have fitted remote servo's tom their clutch system to make it easier on the leg.

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Tuesday 16th February 2021
quotequote all
jamieduff1981 said:
If you do nothing else then you are guaranteed by basic engineering principles that either the stroke of the slave cylinder piston will reduce (potentially no longer disengaging the clutch) for a given pedal movement. To make a larger bore slave cylinder piston move the same linear distance to impart the same movement on the clutch fork, you will unquestionably have to displace more hydraulic fluid via the master cylinder, either from a longer stroke or a bigger bore (which in turn will require more force on the pedal to displace it).
I dont need a physics lesson just a bit of advice .

phazed

21,844 posts

204 months

Tuesday 16th February 2021
quotequote all
Only ideal solution Daz is the Mcloed twin plate clutch.

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Tuesday 16th February 2021
quotequote all
phazed said:
Only ideal solution Daz is the Mcloed twin plate clutch.
Hi thanks Peter ,what's involved ?

phazed

21,844 posts

204 months

Tuesday 16th February 2021
quotequote all
Complete twin plate clutch assembly plus ideally the matching flywheel.

Lovely light clutch that can handle up to 800 bhp.

https://www.mcleodracing.com/rst/p31

Contact them direct and get a quote.


SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Wednesday 17th February 2021
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Would the flywheel knock the balance of the engine out ?

phazed

21,844 posts

204 months

Wednesday 17th February 2021
quotequote all
I believe that if the flywheel is neutrally balanced it will be okay.

Do check with Rob.

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Wednesday 17th February 2021
quotequote all
Thanks ,do I need to buy from the USA and what are the part numbers I need ?

Do I need to buy the flywheel off these people or can mine be modified ?

MikeE

1,828 posts

284 months

Thursday 18th February 2021
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Why not just try the 1” slave RG Parts sell and see how you go, it’s only £45

phazed

21,844 posts

204 months

Thursday 18th February 2021
quotequote all
What clutch have you at the moment Daz

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Thursday 18th February 2021
quotequote all
Peter I have a very heavy duty AP clutch which purchased new from a chap who was going to put it in a race car

I can't seem to find the part numbers ,but it it is more heavy duty than the AP clutch Power sells .
Its took loads of abuse ,and still work perfectly .

I had to stop in a traffic jam ,my leg gave in .

phazed

21,844 posts

204 months

Thursday 18th February 2021
quotequote all
I sympathise with you Daz.

My old clutch was like that. The twin plate RST is like an ordinary production car clutch.

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Thursday 18th February 2021
quotequote all
SILICONEKID 357HP said:
Peter I have a very heavy duty AP clutch which purchased new from a chap who was going to put it in a race car

I can't seem to find the part numbers ,but it it is more heavy duty than the AP clutch Power sells .
Its took loads of abuse ,and still work perfectly .

I had to stop in a traffic jam ,my leg gave in .
Found them

These are the part numbers for the 340f clutch ,you can get one rated at 270ftLB.

Pressure Plate/Cover Plate: CP2394-14

Friction Plate: CP2346-4



your prices are as follows

1/ CP 2394-14 £171.52 + VAT IN STOCK

2/ CP2346-4 £115.03 + VAT TO ORDER.

darren@grahamgoode.com

phazed

21,844 posts

204 months

Thursday 18th February 2021
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The RST setup will cost you a grand but will outlast the car.

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Thursday 18th February 2021
quotequote all
I dont mind spending that but I don't know what I am buying .

Which flywheel and weight ?
Which parts .

Are these only available from the USA ?

Does the 1000 pounds include the fly wheel ?

SILICONEKID 357HP

Original Poster:

14,997 posts

231 months

Thursday 18th February 2021
quotequote all
SILICONEKID 357HP said:
I dont mind spending that but I don't know what I am buying .

Which flywheel and weight ? Which flywheel did you fit .
Which parts .

Are these only available from the USA ?

Does the 1000 pounds include the fly wheel ?

citizen smith

745 posts

181 months

Friday 19th February 2021
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I would imagine that your flywheel would need to be re-drilled to suit the McLoed Pressure Plate. It would also be worth having the flywheel refaced/skimmed at the same time.

hoofa

3,151 posts

208 months

Friday 19th February 2021
quotequote all
Like peter has said only the RST clutch is nice and light, the flywheel just needs drilling to suit. Also you will need to modify the clutch release bearing bracket , on mine I had the back machined to make sure the bearing cleared the clutch fingers. Don’t forget getting a clutch alignment tool.

Mine takes the 605ibs of torques and had no issues, it’s the only clutch to fit in my opinion , think slideways and Mac also fitted this clutch

I got mine from real steel and it was about 800 quid just for the McLeod stuff