25

MotoIQ's project Mitsubishi EVO IX

Project EVO IX: Part 4, In search of the Ultimate EVO Brake System

By Mike Kojima

How do you improve on something that is really good to begin with? The EVO is blessed with one of the best standard equipment brake systems found on any production car. In stock form the EVO has big Brembo 4 piston front and two piston rear brakes and big ventilated rotors on all 4 corners. With the normal brake modifications such as high temperature fluid, braided lines and upgraded brake pads, the stock brakes can handle just about any situation you would likely find on the street, including spirited driving in the twisties. With an aggressive high temperature brake pad, the stock brakes can also handle abusive track duty, even with R-Compound tires. The stock brakes even look good. No wonder many EVO tuners overlook the brakes when building fast EVOs.

To read the other articles in this series click here!

Mitsubishi EVO Brembo 355mm rotor vs stock

The big 355mm Brembo rotor dwarfs the stock one piece rotor. Even though the Brembo part is much larger, the alloy center hat makes it lighter.

Why in the world would we mess with our brake then? Since our plans for Project EVO IX include some serious track use, we first started to consider the idea of upgrading our brakes. Since a stock EVO is a relatively heavy car at close to 3200 lbs, the stock brake pads must be exchanged for some aggressive heat resistant pads for track use with sticky R compound tires to avoid fade. The trouble with these kinds of brake pads is that they are not streetable.

brembo 6 piston monoblock caliper vs stock mitsubishi evo 4 piston brembo caliper

The 6 piston monoblock caliper is compared to the stock 4 piston part here. The primary advantage of the monoblock caliper is that it uses a brake pad twice the size of the stock part. The monoblock caliper is much stiffer due to its one piece construction and the center bridge shown here in the picture.

The aggressive friction material of racing brake pads has a high metallic content including materials like powdered iron, bronze and copper with friction modifiers like ceramic and carbon powders used to maintain a high coefficient of friction at the near metal melting temperatures that brakes sometimes see at the track. Naturally this sort of brake pad is very abrasive.

So they do not instantly wear out the rotors, race pads depend on high temperatures so they can develop what is called a transfer film on the rotors. A transfer film is a thin layer of metallic oxides that bonds to the rotor. The transfer film is formed under the high temperatures and pressures of brakes being pushed to the limit. The aggressive pad material rubs on the transfer film instead of the bare iron of the rotor and the film protects the metal from rapid wear. Think of the transfer film as a wear resistant coating for the rotor that exists at high temperatures.

Brembo anti rattle clips for floating rotors

These tension spring clips are what keeps tension on the full floating rotors so they are free to move but do not rattle like typical racing full floating brakes.

When used on the street, the temperatures do not get high enough for a transfer film to form and the abrasive pad material does a handy job of machining your nice rotors down to nothing in a shockingly short time. We have seen race pads completely ruin a set of rotors in 200 street driven miles. We won’t say who did this (ahem) but let’s say we have up close and personal experience with this. Another minus is that race pads generally do not work well when cold, as in the type of cold that is seen in your first few stops in the morning or when driving on the highway for miles without touching your brakes. This might lead to dangerous situations when the brakes are cold. Finally, racing pads give off obnoxious, sticky, cleaner resistant and corrosive brake dust. This gummy black powder just loves to eat up polished alloys or burn through powdercoating if it is not washed off frequently.

Brembo front brake system for mitsubishi evo

Our brake system installed. Overall the underpinnings of Project EVO look pretty trick.

 

Page 1 of 5 Next Page
Bookmark and Share
Comments
JDMized
JDMizedlink
Thursday, November 26, 2009 9:59 AM
Excellent article as usual.
I don't know what else to say, but keep it up !
Jeffs2006EvoIX
Jeffs2006EvoIXlink
Thursday, September 16, 2010 8:15 AM
It is nice to see what can be done to the Evo, but what started out as an article for "typical mods" for the typical guy, turned into a no holds bar track set up. Spending 1/4 the price of the car alone on the suspension set up, not to mention an almost 1/4 of the price of the car on a brake upgrade all around, most people cant afford this.

It is nice that people get parts for free, or near free because they work for a magazine or whatever, but most working folks can't do this.

It is a good write up, and the pictures were fantastic. Really nice there. Unfortuneately most of us "working" people will never be able to afford such bits.
Mike Kojima
Mike Kojimalink
Thursday, September 16, 2010 12:49 PM
This isn't about typical mods, this series is about building the ultimate sleeper EVO. None of these parts were free, I paid for them. Parts like we are using are not available for free or to be sponsored.

I am a working person and I afford it because I work hard and want to afford it. I was at MOD and I saw plenty of really trick EVO's out there.

Not arguing with you, just that if there is a will there is a way, with me it's getting another job to pay for car stuff.
EVOlutionary
EVOlutionarylink
Tuesday, December 04, 2012 9:34 PM
I have these on my car. Install thread can be seen here:
http://forums.evolutionm.net/evo-how-tos-installations/609461-how-install-nagisa-front-fender-brace.html#post10540890

Great item and highly recommended for a track car. As stated in the Mike's write up it will also pay dividends for a "spiritedly driven" street EVO. . .
Mike Kojima
Mike Kojimalink
Tuesday, December 04, 2012 9:57 PM
What I really like is how they improve the ride comfort!
Post Comment Login or register to post a comment.

MotoIQ Proudly Presents Our Partners:



© 2018 MotoIQ.com