I am considering ditching my OEM brakes to go with a dual wilwood composite master cylinder setup mounted on a 7:1 pedal with a proportioning bar.

I am wodering how much pressure is required to apply brakes as compared to the the stock power assisted setup. This is a project car but it will see some street time.

Any input from someone with a similar setup would be great.

-Rob

 

Can we ask why? There are MANY heavily tracked RX-7s here that still use the stock brake system with larger rotors/calipers with great results. Many times people also install the slightly larger 929 master cylinder to shorten the pedal stroke.

Just curious as to what benefits you think you'll gain by going that route.

 

redundancy, cost (you can buy the setup for aprox the cost of the 929 mas cyl) and the fact that the brakes will not be effected if the engine should cut out.

 

The 929 master is $100-$150. Where the heck can you get the Wilwood cylinders, balance bar, and pedal assembly for that price? You'll most likely need another reservoir for the clutch with that setup, too. I'm not saying you shouldn't do it, but I find it very hard to believe that it won't be substantially more expensive than the 929 master.

-Max

 

you let me know where I can find a 929 master cylinder for 100 bucks and I'm there. ;o)

If not for any other reason (for installing the Wilwoods), I would like to try something different and somewhat unique, though, I may just do a 929 swap and call it a day. Anyhow, I would rather avoid having to justify my questions.

Back to my original question...

also, would you happen to know what the stroke on the 929 master cylinder is? I know that it's a 1" bore but I can't find the stroke.

 

Kragen, or another local auto parts store should have reman 929 master cylinders for $140-ish with a $40 core. The one I got mine from said it would be okay if I brought back my RX-7 master clylinder for the core. However, I brought in my core and they refused it. I think I must have confused the parts counter person when I asked about it originally. I pointed it out that I was returning an RX-7 master cylinder when I brought it in (since I thought it was okay) -- I am pretty sure they would have taken it and not noticed if I hadn't said anything. Still, my total cost was only $140.

-Max

 

Malloy quoted me around 180 for the 929 if I remember correctly. I found a brand new one on ebay for $44.

 

gotta love Ebay. I found a used 929 cylinder with a 3 year warranty for around $95. I think I'm going to just purchase it so I can finally finish this brake system renovation (repalcement) and build/attach the last few lines.

 

gotta love Ebay. I found a used 929 cylinder with a 3 year warranty for around $95. I think I'm going to just purchase it so I can finally finish this brake system renovation (repalcement) and build/attatch the last few lines.