why does the BRZ's brake feel firmer after a hard stop? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

chenshuo · 05-29-2013, 10:34 AM

long story short, i was on my way to work and this guy in front of me was gonna go for a yellow light but decided not to. I was behind him so i had to step on the brake HARD to avoid a collision. Right after that, the brake feels significantly firmer. Why? Should i be worried about anything?

Edit: i should probably add that, when i say firm, i mean i didn't have to step on the brake as deep as before for it to engage braking force. Feels like new brakes.

s0sl0w · 05-29-2013, 10:47 AM

Quote:

Originally Posted by chenshuo

long story short, i was on my way to work and this guy in front of me was gonna go for a yellow light but decided not to. I was behind him so i had to step on the brake HARD to avoid a collision. Right after that, the brake feels significantly firmer. Why? Should i be worried about anything?

probably burped some air into the reservoir by the cycling action of the ABS perhaps?

GNS · 05-29-2013, 11:14 AM

Maybe it's the Brake Assist feature? It helps to apply brake force beyond what the driver can apply with the right foot.

Ganthrithor · 05-29-2013, 11:37 AM

The hard braking brought back memories of being at the track, and the pedal is now aroused.

BRZfan · 05-29-2013, 11:55 AM

"Should i be worried about anything?"

Yes. You should probably not have had to break hard.

Quote:

Originally Posted by chenshuo

long story short, i was on my way to work and this guy in front of me was gonna go for a yellow light but decided not to. I was behind him so i had to step on the brake HARD to avoid a collision. Right after that, the brake feels significantly firmer. Why? Should i be worried about anything?

s0sl0w · 05-29-2013, 12:13 PM

Quote:

Originally Posted by BRZfan

"Should i be worried about anything?"

Yes. You should probably not have had to break hard.

After seeing quite a few of your post I've decided you're a tool. Sometimes people do dumb things in front of you or maybe you were going a bit fast or maybe following too close. Does it really matter why he had to stop quickly? The point is he did stop so quit being an ass.

strat61caster · 05-29-2013, 12:50 PM

Quote:

Originally Posted by s0sl0w

After seeing quite a few of your post I've decided you're a tool. Sometimes people do dumb things in front of you or maybe you were going a bit fast or maybe following too close. Does it really matter why he had to stop quickly? The point is he did stop so quit being an ass.

It is the vehicle behind who is responsible for keeping a safe following distance. If the car in front of you slams on the brakes for a squirrel, yellow light, small child, or if their tire blows up or engine seizes you NEED to have the space to come to a safe and controlled stop. It's basic driving etiquette not to mention the law, doing so can save lives.

Nobody is perfect, but a reminder every now and then doesn't hurt.

atledreier · 05-29-2013, 01:07 PM

Most likely it's just the brakes being up to temperature. The first corner on track the brakes feels like glass, but after the first few hard scrubs they are up to temp and bite like I'm used to. Same thing on the street. Most people never tried brakes that are up to temperature (not boiling of course). The bite can be significant compared to cold brakes.

chenshuo · 05-29-2013, 01:22 PM

Yea I admit i wasn't keeping enough distance. It was during the morning rush hour i find if i keep enough distance, some other car is going to squeeze into the gap.

So nothing to worry about?

strat61caster · 05-29-2013, 02:01 PM

Quote:

Originally Posted by chenshuo

So nothing to worry about?

Doesn't seem like it, they'll feel different with temperature changes as well as the brake booster as mentioned.

If it went from "spongy" to rock solid in one stop though there may be some cause for concern, keep paying attention and if it's repeatable or any other signs go to the dealership.

Ganthrithor · 05-29-2013, 03:56 PM

Quote:

Originally Posted by strat61caster

It is the vehicle behind who is responsible for keeping a safe following distance. If the car in front of you slams on the brakes for a squirrel, yellow light, small child, or if their tire blows up or engine seizes you NEED to have the space to come to a safe and controlled stop. It's basic driving etiquette not to mention the law, doing so can save lives.

Nobody is perfect, but a reminder every now and then doesn't hurt.

Agreedo. It happens, but ideally it shouldn't.

Wilsonk227 · 05-29-2013, 04:09 PM

hmm not sure if it has much to do with it, but check your brake fluids just incase? I'm not a car tech guy but just a suggestion.

Bristecom · 05-29-2013, 05:32 PM

Quote:

Originally Posted by atledreier

Most likely it's just the brakes being up to temperature. The first corner on track the brakes feels like glass, but after the first few hard scrubs they are up to temp and bite like I'm used to. Same thing on the street. Most people never tried brakes that are up to temperature (not boiling of course). The bite can be significant compared to cold brakes.

This is correct. Sport brake pads get more friction as they heat up. But if they heat up too much, you'll lose friction. It was your brake pads. Nothing to worry about.

05-29-2013, 10:34 AM	#1
chenshuo Senior Member Join Date: Nov 2012 Drives: WRB BRZ Location: Toronto Posts: 1,260 Thanks: 259 Thanked 473 Times in 245 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	why does the BRZ's brake feel firmer after a hard stop? long story short, i was on my way to work and this guy in front of me was gonna go for a yellow light but decided not to. I was behind him so i had to step on the brake HARD to avoid a collision. Right after that, the brake feels significantly firmer. Why? Should i be worried about anything? Edit: i should probably add that, when i say firm, i mean i didn't have to step on the brake as deep as before for it to engage braking force. Feels like new brakes. __________________ Last edited by chenshuo; 05-29-2013 at 12:40 PM.

05-29-2013, 01:22 PM	#9
chenshuo Senior Member Join Date: Nov 2012 Drives: WRB BRZ Location: Toronto Posts: 1,260 Thanks: 259 Thanked 473 Times in 245 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Yea I admit i wasn't keeping enough distance. It was during the morning rush hour i find if i keep enough distance, some other car is going to squeeze into the gap. So nothing to worry about? __________________

05-29-2013, 04:09 PM	#12
Wilsonk227 Senior Member Join Date: Mar 2013 Drives: Super Vehicular Terrain Vehicle Location: Rosemead, CA Posts: 395 Thanks: 211 Thanked 170 Times in 99 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	hmm not sure if it has much to do with it, but check your brake fluids just incase? I'm not a car tech guy but just a suggestion. __________________ ig: @MrWiils0n

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05-29-2013, 11:14 AM	#3
GNS Senior Member Join Date: Jul 2012 Drives: . Location: Ontario Posts: 350 Thanks: 28 Thanked 223 Times in 105 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Maybe it's the Brake Assist feature? It helps to apply brake force beyond what the driver can apply with the right foot.

05-29-2013, 11:37 AM	#4
Ganthrithor Senior Member Join Date: Feb 2013 Drives: '13 BRZ, '06 997, Other Things(TM) Location: Santa Barbara, CA Posts: 1,078 Thanks: 1,715 Thanked 670 Times in 351 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	The hard braking brought back memories of being at the track, and the pedal is now aroused.

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