Adding a servo to my clutch system

[The AJP Griff]

I quite fancy adding a servo to the hydraulic circuit of my clutch in the griff,in order to make it lighter to use.Apart from the necesary space required,is there anything i need to bare in mind to carry out this conversion?Any pitfalls etc?Any advice greatefully received Cheers,Mike

[rev-erend]

I fear you will also have to get rid of the medallion .. and after that it will be roof up everywhere..

The slippery slope

[Paul Drawmer]

Not heard of a servo-assisted clutch before.

I know nothing about the pedal arrangement of your car, but you may be able to make a significant change in pedal pressure by altering the leverage.

If you lengthen the pedal, or shorten the clutch actuating bit, you will decrease the pressure required; albeit at the expense of extra travel.

[dnb]

Can you not use a concentric hydraulic release bearing to make it light enough?

I had the pedal box out of my Griff this week, and there really isn't any spare space...

[stevieturbo]

You can get remote servos.....dont ask me where, but I know you can.

Some old cars had the servo's remotely mounted for their brakes.

[trackcar]

remote servos were popular for minis many years ago, and some cars have remote servos where the change from LHD to RHD is space-compromised (some BMWs for eg have twin remote servos in the front passenger inner wing). Some early Lamborghini (Miura?) had a servo assisted clutch also

[Fume troll]

trackcar said:

remote servos were popular for minis many years ago, and some cars have remote servos where the change from LHD to RHD is space-compromised (some BMWs for eg have twin remote servos in the front passenger inner wing). Some early Lamborghini (Miura?) had a servo assisted clutch also

I've seen it done on a LR Defender. Lots of space though. I wonder if you could have a break over spring that assists after the pedal reaches a certain point?

Cheers,

FT.

[GreenV8S]

Just fit a smaller bore master cylinder?

[The AJP Griff]

To answer a few replies....I will still wear my medallion with pride,it's my wife that i want to do this for.The slave is a concentric type,it's a Cerbera in this respect.You can get a remote servo very easily,i've been looking at some with up to 2 times boost which are 6" in diameter,and am thinking of mounting it in the inner wing.
I've thought about a smaller master cylinder,but this plan is in case it doesnt work,after all,im guessing that TVR would have made it lighter in this way if at all possible?

[stevieturbo]

GreenV8S said:

Just fit a smaller bore master cylinder?

Then the clutch wont release

[dnb]

I suspected you had a concentric slave, but I don't understand why the clutch is heavy, unless yours is somewhat more uprated than usual?

The last Cerb I drove had a similar clutch weight to my Impreza. (Maybe I have my rose tinted glasses on?)

I know you have space in different places in your car, but the inner wing on the driver's side is pretty full... You could probably get a remote something mounted under the dash just behind the steering column mounting bolts. (where my electric PAS will probably be going)

Best of luck finding some space.

[stevieturbo]

Or perhaps just source a new clutch ?? Maybe there is actually a fault somewhere.

[The AJP Griff]

dnb said:

I suspected you had a concentric slave, but I don't understand why the clutch is heavy, unless yours is somewhat more uprated than usual?

The last Cerb I drove had a similar clutch weight to my Impreza. (Maybe I have my rose tinted glasses on?)

I know you have space in different places in your car, but the inner wing on the driver's side is pretty full... You could probably get a remote something mounted under the dash just behind the steering column mounting bolts. (where my electric PAS will probably be going)

Best of luck finding some space.

Hi Dave,to be fair,the clutch weight isn't really an issue for me,but for Mel it's a bit different as she has arthritic knees.The only Tiv we've had that she enjoyed driving was the Tuscan,on which the clutch was featherlight by comparison,even easier than her MX5!I looked at putting the Tuscan pedal box in,as it's this that makes the clutch so easy by it's leverage(the hydraulics are identical to the Cerbs clutch),but it isn't really do-able.I just thought the easiest solution must be to servo the existing arrangement.I know space is at a premium,but like you,i thought about under the dash area if the inner wing will not provide it.

[GreenV8S]

stevieturbo said:

GreenV8S said:

Just fit a smaller bore master cylinder?

Then the clutch wont release

Mine has far more travel than it needs.

[stevieturbo]

GreenV8S said:

stevieturbo said:

GreenV8S said:

Just fit a smaller bore master cylinder?

Then the clutch wont release

Mine has far more travel than it needs.

But does his ?? lol

[That Daddy]

stevieturbo said:

You can get remote servos.....dont ask me where, but I know you can.

Some old cars had the servo's remotely mounted for their brakes.

Girling Powerstop came in different sizes 6"-9"was fitted to Rover P6,s,Hillman Hunters,Imps,and loads of other stuff around that era,great unit and very simple to rebuild was actually offered as kit form for various cars too. http://oldholden.com/node/59695http://shop1.actinicexpress.co.uk/shops/Rat_Sport/... may be of some use

Edited by That Daddy on Tuesday 15th July 20:24

[BB-Q]

If you want to do it cheaply look at old Landcruisers and the like that had them factory fitted.