Big Red Brake Up Grade

[rsrdave]

I am upgrading my1980SC brakes to 993TT Front Calipers and I think the Rear are
GT3 (can't tell as no markings) .I bought them off a Doc who said they were both 993TT but don't think they are .
Anyway I have to adapt the rear arm to fit rear caliers .
Can anyone tell what Master cylinder I will need or will I need to fit a pedal box ,or can you recommend options .cheers Dave

[James Brown]

I think the stock sc mc will work. If not, go with the turbo one.

[Steve@Rennsport]

You will need a 23mm MC for those calipers.

[Porsche84]

I have a similar set up on my 84. Installed the turbo MC and has worked well for many track events. Great set-up. Never have a soft pedal at the track. Just make sure you get them on the correct side of the car. The calipers have a small piston and a larger piston. the small one needs to be the first one the rotor passes. If your's are not that way, flip the bleeders and the bridge.

[kupcar]

I use a 23mm and works good. Jeff

[rsrdave]

thanks guys for your help cheers Dave