i heard about this mod on the fc, do you just take the master cylinder and keep the fc proportion valve or use the 929 one.



also, what years 929 can i get it from?

The 929 MC is only a bolt-on for 89-91 Turbo brake boosters. The NA's and S4 Turbo and NA's have a different brake booster. If you buy the 929 ABS MC, it will work on ABS cars. And if you have a non-abs FC, you need the non ABS 929. But you can use the stock fc prop valve. Any 93-96 type 929 will work.

And why do people do this mod?

[quote name='ColinRX7' date='Jul 22 2005, 02:07 PM']And why do people do this mod?


[/quote]



the 929 mc has a larger diameter piston. It can move more brake fluid. If you are using larger brakes (like I am, 6-piston wilwoods) the extra size increase will return a nice, stiff pedal feel. The larger mc isnt going to do much to a stock brake'd fc. The stock brakes on a gxl/turbo car are over-engineering as it is....

Oooh, this is good to know. I thought this was a FD mod.

i did it on my stock FC brake system . I found that it gave the pedal more feel and can modulate with pedal pressure instead of pedal travel at the limits. Which to me is easier.

Excellent!

aww weak.



does anyone have the parts number for a S4 4 piston proportioning valve