911 breaks

[junk yard dog]

Will a master cylinder from a kia Rio work in my festy

[Bert]

That is an excellent question, and if/when you find the answer please enlighten us all. Desperate folks will try anything and numerous desperate folks without lathes/mills/MIG welders are merely looking for easy answers. Aspires and early Rios have so far shown to be wonderful Festy subs and this is just another case of "it retro-fits" then we're lucky. Go for it laddy and please report back.

[DriverOne]

Re: 911 breaks

I too would like to know about this! If your RIO BMC doesn't work, the '94 Protege BMC does, and is $25 new on Rock Auto.

[bravekozak]

The Kia Pride master cylinder KK15043400D costs $68.50 + shipping from Korea.

[navdoc101]

Is the RIO M/C larger than the Escort M/C? The Escort M/C is larger than the Festy one & is a direct fit, with a small mod.(plug 2 lower fittings).

[Damkid]

911 breaks

Aspire MC's work as well

[Christ]

Be very careful about mixing and matching parts like this.

If the new MC is too hard, it will seriously alter brake feel and require much less travel to lock the brakes up.

If it's too small, you won't have the power to lock the brakes, and it will increase travel required to apply proper braking pressure.

If you don't know how to determine the best size for your setup, it's best to stick with something that's already designed properly until you have a chance to educate yourself.

[Bert]

Be very careful about mixing and matching parts like this.

If the new MC is too hard, it will seriously alter brake feel and require much less travel to lock the brakes up.

If I did this and my car for the very first time ever felt 'like the instant brakes on a Volvo/BMW/Audi' as a consequence I don't think I'd ever feel sorry. Bigger M/C, less the worry and the smaller the effort; so where do I sign up?

[rbrown]

I have been looking at alternates too.

I have been pulling the capri apart and noticed it has a small MC. And the internal piston is smaller too. But the ports are much more different. I do not think it wise to add a 4 port MC and simply plug 2 ports. Have to know how the internal valving works before I would do that.

But with that said, I do think I need a bit bigger since I will be running the Rio larger brakes. But I might try it first with the Festy one.

[shadetree]

Rio master will not work ! Rio master booster combo not sure about .

[bravekozak]

Somewhere in my library, I have a book on racing brake systems. Besides the usual recommendation to use teflon lined stainless-braided -3 AN hose (please correct me if I am wrong), the front wheels should lock a split second before the rear wheels lock. To achieve this, a variable proportioning valve is necessary on the rear brake line. Do a number of panic stops in front of a witness. Adjust until successful. This method will take into account tires, and suspension modifications.

[navdoc101]

I put a Escort M/C on my Festy. No problems, several other members have done this same mod. Search and you will find thier threads. No one has reported ANY problems. My brakes feel a lot better. The Escort M/C is not a lot bigger than the Festy one, just right IMHO!

[Christ]

If I did this and my car for the very first time ever felt 'like the instant brakes on a Volvo/BMW/Audi' as a consequence I don't think I'd ever feel sorry. Bigger M/C, less the worry and the smaller the effort; so where do I sign up?

A bigger MC will require more effort over a shorter travel. You have less mechanical advantage and if it's too big, you lose the wide margin between too much brake and TOO MUCH BRAKE!!!

Your brakes, ideally, should lock up no less than half-way through the pedal travel, which allows you to still lock hot brakes compensating for a "squishy" pedal.

If you're comfortable with the shorter travel, more power to you, but it's not ideal and affords no real advantage.

[Bert]

When I did the Aspire swap I contemplated doing the Aspire MC swap too (hey the parts were there and they were free) but the Aspire set up was considerably larger (particularly the booster) and ultimately I didn't do it. I don't have any regrets; the car stops just fine with the existing Festy MC. I'm no connoisseur of brakes but I do know that what I've got at the moment works.

[PhoenixSHO]

03-05 rio , the booster bolts in , but unsure if it fits in a stock festy. I also got the rio MC in , fisrt off the brake line fittings are differant , they are bubble flares. So you need to change your hard lines. My setup is currently untested , so until then , stick with whats known.