CSP 14inch Disk Brake kit

[Fraggle]

Hi

Do you have to replace your master cylinder with a later 'disk brake' master from bay when you fit this kit??

The CSP guys say you do but I can't see why?? What's everyone else done??

My bus is a 68 with dual circuit drum brakes all round at present....awaiting disk kit!

Cheers for any replies in advance.

 

[stuartrx7]

Hi Fraggle i have csp disc brakes on my 1970 bay,I alsoi have used the same master cylinder with no problems,To my knowledge you only have to use a later master cylinder if you have a single circuit system.

 

[slammedkustom]

drum brake master cylinders have "pre load" to keep pressure on the wheels cylinders, calipers dont need to be preloaded so you will basicaly be driving with your brakes on just a little bit.
after a while your either warp your disc or wear your pads out in a fraction of the time, i deal with CSP all the time and they wouldnt tell you to change a component unless it was nessercery.

on a lighter note creative enginering are doing the CSP fitting kit for £35ish, bargin that is!
C :wink:

 

[speedwell68]

How good is the CSP 14" disk brake conversion, is there much more braking power than with front drums?

 

[Fraggle]

Slammedkustom - what fitting kit?? I don't understand why I need a fitting kit. I do understand why I need a new master cylinder now as your the second person to say aboutthe preload. Can't I just bolt on a later master cylinder sold from GSF etc?

 

[slammedkustom]

im 99% sure on the bay a dual circuit cylinder will go straight on
splittys need an adapter cos you use a 73 to 79 bay master cylinder

 

[Fraggle]

Cheers Buddy

 

[slammedkustom]

no probs!

 

[slammedresto]

ive just fitted a 15" csp disc kit, do i need to change my master cylinder??

its a lhd USA 69 westy

 

[slammedkustom]

if it came with wide 5 as stadard then you should change the m/cylinder as the calipers will "drag"
use a 73-79 bay one

 

[kevdonlon]

Wheres the best place to get one from?
cheers kev

 

[slammedkustom]

i think machine7 is the cheapest and is a proper CSP dealer so any probs shouldnt be a prob!
if you get my drift!

 

[Fraggle]

Machene 7 told me it would be ok to use the standard one when I called them!!!!!!! :? :?

 

[Rexer]

im fitting the 15" kit on my 1970 dormobile, i was told you only need to change the master cylinder if you have single circuit brakes, im not sure but i think that includes splits and 68 bays only, i know mine has dual circuit.
would'nt be a bad idea to put a new one on anyway if your going as far as changing to discs as the old one is probably getting tired anway.
thats what im doing anyway.
Nick

 

[slammedkustom]

as far as i know the reason you change the master cylinder in a split is because it is single circuit an drums, on an early bay it is dual circuit and drums.
drum brake master cylinders have a residual pressure of 10 to keep the pressure on the slave cylinders
disc master cylinders have a residual pressure of 2 so there is little pressure on the brake calipers.

ive known a few people who fit the kit, dont change the cylinder and then their disc warp on the first long run.

personally i think if your spending £600 on a disc kit then fitting a new cylinders isnt gonna be much more expensive. also a lot cheaper than replacing the front end of your bus...

dont mean to sound like i know it all but good brakes and tyres should be top of the list every time.