I need to replace my stock EVO rotors soon. They have survived over 20 track days with racing pads grabbing them all day. The car has 22,000 miles, of which at least 4,000 are track miles. The stock rotors held up well.

Should I replace them with another stock set, or get aftermarket rotors (slotted? drilled?), and if so, what brand?

Thanks.

 

i would stick with stock.

i tried the R1 concepts rotors and they cracked after 6 track days or so . . . and didn't perform noticably better or worse than stock.

the 2-piece floating performance friction rotors crack a bit too after track use (someone on socalevo.net did a write up and report, i think his name was earlyapex)

 

Performance Friction 2 piece floating dimpled rotors from RRE.

come on, you already knew that...

 

wt??? weren't you the one talkin' all that **** to david on socal? why are you even asking this question? and why would you wanna get stock rotors again?

nils has a pretty sick car. are you running pfs?

heh i always see richevos car at rre... like every time i go. how's that radiator workin' out? cuz justin told me that he was puttin' in the pwr biggie rad in your car.

 

yup... the PF's work great for me...

n

 

you got any inside info on when the rears are coming out?

 

I'm not a big fan of slotted/drilled/dimpled rotors. I find plain rotors hold up the best on the track. I've never seen any improvement in braking with the other designs...just shorter rotor and pad life.

But our stock rotors have a few strikes against them. They're heavy and the design of the internal vanes makes for poor cooling efficiency (in fact, stock rotors don't even have real vanes...just a bunch of posts). In my view, the ideal rotor would be a 2-piece, plain, directional vane design.


I've gone with custom 2-piece plain rotors with directional vanes. We'll see how they hold up on the track: I have a bunch of days in a row coming up this week. If they test well, my buddy will put them on the market.

Emre

 

you never glazed pads? cuz that's what the scraping is for...

 

I was going to go with Brembro slotted rotors, all the way round, and frodeo pads. I wanted to get brembo rotors to go with the calipers (i believe are stock rotors are made my mitsu).I dont really like drilled rotors but really like slotted. I have had slotted rotors on a couple of my cars and I felt a great inprovement. Also most race cars and such use slotted rotors and i never seen race cars with drilled rotors.

 

i have the slotted rotors from rotora and they work great with some hawk brake pads whats a diff.

 

but you can't use hawk hps in the track

 

Never. Glazed pads are the result of poor bedding in and improper brake application. If you bed in your pads properly and know how to brake on the track (i.e., short and hard application with quick release...no dragging) then your pads will never glaze.

For the record, slotting (a.k.a., "gas slotting") was NOT conceived to prevent pad glazing. In fact, pad glazing isn't even an issue in high-performance driving...it's only an issue with sunday drivers on the street. Like cross-drilling, gas slotting was originally designed to prevent "green fade" when the resins holding organic pads compounds together would vaporize from the pressure. That's why it's called gas slotting: the slots allow the gas between the rotor and pad surfaces to escape. Modern ceramic, metalic, and other high-carbon brake pads simply do not outgas to any noticable degree. Cross-drilling and slotting is largely an anachronism these days.

Emre

 

The "improvement" you felt was because you switched from worn out rotors to new rotors. And maybe you also swapped in new pads at the same time?

There's no way you can "feel" an improvement in braking comparing brand-new stock rotors to brand-new slotted rotors. Slots do not increase brake torque in any way...and that's what you feel.

Emre

 

hawk has two diff. kinds of pads one for street use and the other for track use only

 

Hawk has many different pad compounds. Some are for the street (e.g., HPS and HP+) while others are for the track (e.g., Blues and HT-10's).

Emre