The Pros and Cons of Putting Aggressive Performance Brake Pads on Your Daily Driver
There are inherent risks and a few inconveniences... Like listening to squeaky-ass brake pads in traffic.
If you want to accumulate significant time on a race track but your disposable income and parking room is limited like mine are, you might have to run the same car you use for daily driving on the course. There are inherent risks to that, and a few inconveniences. Like listening to squeaky-ass performance brake pads in traffic.
Keeping an eye on your vehicle’s mechanical condition and having exceptional awareness on track are key to preventing a crash. But even if you’re able to keep your car clean on track, you’ll still have to work out the equation of how much noise, vibration, and harshness you’re willing to endure on your way to work Monday so you can try to drop your lap times on Sunday without changing anything?
If you’ve got a one track mind for going fast, you’ll be more willing to trade-off comfort for performance. Even if it means making your friends carsick, destroying your ear drums, destroying your spine, or even getting a concussion from repeatedly hitting your head on the headliner.
Upgrading your car’s brakes is a hugely significant step you can take towards improving its track-worthiness, but contrary to what you might imagine, brakes meant for “motorsports” can actually be suboptimal. Especially when they’re not being used, you know, under track conditions.
Upgrading Brakes Efficiently
The great thing about attending track events is that you can genuinely show up with anything as long as it’s in decent mechanical shape and isn’t leaking any fluids.
If you’re going to start upgrading, or want to have a better and safer time in a stock-as-heck car on track, brakes are the best place to start.
As important as acceleration and cornering are, brakes are what bring your fast-driving flow altogether. Having strong brakes that stand up to higher temperature due to repeated hard use are crucial. They also as provide more direct feel, make driving on track more fun, and help drop lap times.
DOT5-rated brake fluid has a higher boiling point than DOT3 or DOT4, which is what most cars run conventionally. DOT5 ensures you won’t lose braking strength due to repeated use at higher temperatures, and it has more longevity than convention DOT4. In colder climates though, it can take slightly longer to come up to operating temperature. In that case, swapping out fluids depending on the season is a good idea.
I started out upgrading the brakes on my Mazda2 by swapping to DOT5 fluid, using performance street pads, and braided, stainless steel brake lines. Braided lines don’t expand and contract and lose efficiency from higher temperatures like rubber lines. Think of the steel braiding like a binding, or a corset – if the line tries to expand or swell out of shape, which can happen in high-heat situations and diminish braking responsiveness, it’s held in place and your brake pedal feels consistent.
The steel also acts as armor; there’s less chance of a line being damaged from going off-track or hitting debris. Some people disagree and say rubber lines are fine, but for how cheap they are, it’s a why not mod in my book.
Swapping in performance street pads helps maintain braking strength at higher temperatures than factory-style pads. In general, because performance pads have a more metallic compound, they might wear rotors a tad faster and produce more dust, but they’re a great upgrade over OEM for sure. After trying this mild upgrade, I wanted to upgrade to something more aggressive as I got faster and faster on track. That’s when I experienced an inevitable but annoying side-effect… The stronger, more track-focused my pad choices got, the more annoying they became to use on the street. And we’ll get to why soon.
Performance Pads To Race Pads
As I got faster on track, performance street pads became overwhelmed and overheated by shorter, more intense braking zones. They weren’t cutting it anymore. They’d fade and lose strength, causing me to either go off the track, understeer off line, or a gloriously terrible combination of both. I then changed up to more aggressive pads that literally did cut it – they were so strong that they ate up and cut grooves into the rotors quite quickly.
After a bit of research and trial and error, my most recent track pad choice has been G-LOC R10s. These are a popular compound in SCCA B-Spec racing; a class where caged, race-prepped versions of my Mazda2 shine. These pads have great modulation, are quite strong, and stay strong all-session-long. They also aren’t harsh on rotors. Modulation is key; being able to feel how much clamping force there is on the rotor, especially while trail-braking into tricky corners, is paramount for holding momentum and getting my 100-horsepower Mazda2 around a track in decent time.
However, off-track the benefits of these pads quickly faded (pun sort of intended).
When Racing Pads Start To Suck
Like I stated earlier, stronger pads are stronger pads; on the street, they grab and slow my Mazda down significantly better than an OEM pad compound. But since the temperatures for road driving and track driving are different, so are the pads’ characteristics.
The G-LOCs take a bit of time to warm up. This is never an issue on track. Even on an out-lap meant to warm the car up, there’s enough hard braking happening to bring them up to temp before the first flying lap. But the street is much different. Cruising through my 25 mph neighborhood after just-firing-up the 2 requires an increased stopping distance at the first stop sign. It’s not terrible, but it’s longer than a cold OEM pad compound for sure and takes some getting used to.
Then there’s the noise. Oh my stars, the noise. Easy going street driving, especially on a cold and or damp SoCal morning, means the G-LOCs are squeaking pretty much all the time, until the brake pedal is firmly pressed. Lighter stops of the quarter-to-half-pedal variety make a loud grinding noise that cuts right through the eardrums. It’s a deep, pronounced grinding; I’m not the type to cringe at nails on a chalkboard, but this noise is brutal. Sometimes it sounds like I’m dragging a big, heavy pipe under the car.
The only remedy is to do as many hard of stops as possible, acting like a total dick in the process.
Decent-flowing, mild traffic on the highway is very annoying, too; it puts the pads in a sort of noise purgatory. The temps are too cool to stop the constant squeaking, and feathering the brakes when needed causes slightly-less-annoying grinding.
This has all been a lesson in compromise. Or, rather, the stock style brakes are supposed to be a “compromise” between functionality and comfort. The compromise I made was “comfort be damned.” Brakes that perform wonderfully on track mean dealing with downsides on the street. However, there’s still a lot of meat in the middle of this Venn diagram.
Racing Brakes Can Actually Be Fun on the Street
When racing pads are warmed up, they’ll perform really well. Like, really well. This is very handy for dealing with sloppy drivers who like to get in your way and hate using turn signals. Strong, grabby brake pads are reassuring in these scenarios.
Then, there’s having fun on twisty canyon roads. Strong track pads ensure adequate stopping power for mild enthusiastic driving as well as any kind of emergency situation. Like massive rocks in the middle of the road that can’t be avoided. Or dickheads in cars or or motorcycles crossing the double-yellow line in front of you; being able to stop or change direction quicker means a better chance of avoiding a bad situation.
There’s one more street benefit to share: loud brakes save lives. Like the old saying loud pipes save lives, having something that reminds other drivers of your presence on the road, especially if you’re in a small car, is always a good idea. Asserting one’s presence with loud racing brakes comes in handy, and might even over-power the Nickelback blaring out of some lifted bro-dozer.
Swapping Pads at the Track Is Also an Option
I just blabbed a lot about the ups and downs of mounting up track pads to a daily, but one can also just swap pads in and out at the track or the night before the event. Most caliper designs are pretty simple, and with the right tools can be removed and re-mounted pretty quickly.
I’m blessed that my Mazda2 has very simple, single-piston front brake calipers. Remove two 14mm bolts, slide the caliper off and rest it on the rear shield, pop the pads off, slide the new ones in, and re-install the caliper. Done. This way I can daily on a performance street pad, and track on an aggressive track pad. The rear brakes on the 2 are drums; they don’t do much as they don’t have to.
There are some risks associated with doing this, though. A lot of OEM and performance street pads require a bit of pad material transferred onto the rotor for optimal performance, do your research when selecting pads. Track pads remove this material due to their aggressive, mostly-metallic makeup. Redoing this with the OEM or performance street pad is strongly recommended after they’re re-installed, which is done via the pad brand’s listed bed-in procedure.
I actually very recently started doing this. I overcame my laziness of not swapping pads in and out of a super simple caliper design, and recently put Hawk HPS 5.0s on for street driving. They’ve been performing great after I bedded them in properly post-G-LOC.
This is probably the move, and ensures living a life of less suffering. Though it does mean factoring in more steps and frequency for prep, which becomes a trade-off on its own. Especially if your time is limited.