G27 BRAKE MASTER CYLINDER

[whiteonyx]

Need help in finding out what type of brake master cylinder is used on a G27R.
The cylinders have Girling stamped on the side but need to know what vehicle there off as both of mine are now goosed and have to replace asap.
THANKS

[kitkat-muffin]

the master cylinders are available from places like demon tweeks / rally design etc etc.

thay come in 3 sizes .625, .700 & .750. I remember using .625 frt & .700 rear on the g27dr race cars(1995/1998) & .750 cylinder on the rear when thay were converted to disk brakes on the rear .(2000).

you can also get a repair kits for them.

[whiteonyx]

i have seen .70 on the outer piston, i didn't know that there were different sizes for front and rear.
My car is a 97DR with discs all round.
With reference to the repair kits how easy is it to do?
regards all

Edited by whiteonyx on Saturday 23 January 17:39

[dcr]

Before you buy a repair kit , take the master cylinders off, remove the pushrods and look at the end of them. If they are a modified bolt as supplied by the factory when new ,go and buy new cylinders. They push the pistons unevenly and generally don't work very well! You will have to space the master cylinders away from the bulkhead to get them in with the standard pushrods. With bolts in they can be relied upon to lock the brakes on randomly like some of the cars from the factory when new! For the cost of the cylinders and the fact that they are brakes , i wouldn't put repair kits in them, a second pump on a clutch you could cope with but on the brakes is too exciting!!

hth, Dave