I have video of me racing, and you can see that coming down from the highest speed portion of the track into a slalom that my rear brakes locked pretty much at the exact same time as the front tires. Meaning that the bias is correct. You may very likely hurt your braking ability by adding disc brakes to the rear and in fact increase your braking distance or even cause your car to be far more unstable during braking.

In other words don't think about changing them if you actually plan to race or drive hard.

 

Why do most high performance cars have disk brakes rather thatn drums?

 

Looks, heat dissipation, weight of the vehicle, etc.

Keep in mind not more than 30 years ago Forumla 1 race cars were four wheel drum.

It's easier to make discs upgradeable and more powerful in the long run, but it doesn't always mean it's necessary. On our cars the rear drums are quite strong, and our braking distances are impressive. Keep in mind that we brake only about 10 feet longer than an evo from 60 mph. And that is done on stock tires, so I think you could see that distance erased with better tires.

 

wow, i found this post very informative THANKS!!

 

yeah mee too...sdhtown is the best with info so is rhyzin...these guys are good

 

Well, I'm not sure but all I know is that if you want rear disc brakes, you have to get the ralliart rear disc brakes cuz the size is the same as the normal lancer. Changing the drum to discs is not like putting a rim or tire. You have to change almost every parts in the rear in order to put the disc. That's why it's expensive. (And I think if you ask the auto shop to produce disc brakes, it would cost more.)

 

Sdhotwn is 100% correct. if you were to do a rear disk swap, it would destroy the braking balance of the car, resulting in increased braking distance. NOTE: The Ralliart Lancer has bigger front brakes as well.

Brakes on the US Lancer:

10.1in discs in the front
8.0 in drums in the rear

Ralliart Lancer:

10.9in discs in the front
10.3in discs in the rear

If only the rear ralliart brakes were to be installed on the US Lancer, the rear rotors would be bigger than the front!

If you really really want to do a 4 wheel brake swap, you would need the following:

Front and Rear Brakes from the Ralliart.
Proportioning valve from the Ralliart.

A proportioning valve is what controls the brake pressure diffrences from the front to the back.
I'm willing to bet that the proportioning valve on a disc/disc setup will be much diffrent than the disc/drum setup. With these three things, you would retain perfect brake balance.

 

so, say i found like a salvage ralliart and i took there braking system off it and put in on my us lancer, then would i have good braking performance or would i still be messing it up??

...not that im gonna do it n e time soon, but its always something to keep in mind!!

 

Kontradictions has the conversion for his Lancer. Last I heard he hasn't installed it though. And some custom work has to be done before it can be installed. Got it from Wilwood.

 

As long as you have both front and rear brakes and the proportioning valve, you will not be messing anything up. Infact, you will have the same braking performance as the Ralliart Lancer.

Hehe.. I would take the engine too, if i found a salvaged ralliart...

 

I know some manufactuers make conversion kits for the Civic. Now, if the Civic has 4 lugs and the Lancer has 4 lugs, why can't -of course with the proper customizing- this work?

 

It could work... the problem is that that customization you are speaking of includes axles, strut bottoms, control arms, etc. Basically a massive amount of things you'd have to cnc to make it all line up. Not to mention that this is your BRAKES we are talking about. Frankly I'm not interested in risking a mistake there .

 

i'm doing homework on a rear disc swap as well as a larger front disc swap. i believe it's totally possible with other mitsu parts as the mirage guys have gotten it down already. as money permits, look for it in the future. same size as the ralliarts without hub swap and dual piston front calipers instead of single.

 

There is already a big brake kit for the lancer willwood makes it i think they are 4 piston calipers too

 

1. the ralliart is 5 bolt.. keep that in mind
2. you will ned more than the rear suspenion.. you need a new brake booster and master cylinder from the front..
3. you will probably need a new proporational valve and stuff
4. then you will have to get the new abs computer and sensors
5. the ralliart also have EBD, which your ecu can't do.. so it's another hurdle


at the end of the day.. you won't get much better performance..