Need some info about brake pads

[vr2turbo]

I don't know the exact boiling temperature but it overheated with me and my 3-speed auto downhill genting with 1-2 gears all the way down. DOT4 btw.

That is because always steeping on the brakes when downhill......

 

[vr2turbo]

I see .....do you know what's the working temperature of brake fluid during normal daily commuting usage? I always thought that the temperature are not far off with the fluids considering it's indirectly in contact. eg rotor>pads>piston>fluid

Normal commute got time to cool.......

 

[y2188]

I don't know the exact boiling temperature but it overheated with me and my 3-speed auto downhill genting with 1-2 gears all the way down. DOT4 btw.

How does it feels like when the fluids are boiling? spongy?

Normal commute got time to cool.......

Actually i have some question like these, let say on a track is the main straight long enough for the brakes to cool down 20-30 degree? or just slightly difference :hmmmm:

 

[vr2turbo]

How does it feels like when the fluids are boiling? spongy?



Actually i have some question like these, let say on a track is the main straight long enough for the brakes to cool down 20-30 degree? or just slightly difference :hmmmm:

Yup, spongy or even no brakes, pedal can just go down.....

Track different leh because braking hard, and only got one or two straights only, others all corners.....hahhahahha

 

[Izso]

How does it feels like when the fluids are boiling? spongy?



Actually i have some question like these, let say on a track is the main straight long enough for the brakes to cool down 20-30 degree? or just slightly difference :hmmmm:

Pedal feel is instantly different, like suddenly you need to press more to get the same amount of braking. And easier to fade. Very scary experience, will make you drive slower instantly. And gearbox overheated too that day.



When brake fluid boils, it boils the water in the mixture and introduces pockets of air, which in turns makes pedal feel crappy and spongy. Your brakes just aren't the same after that.

 

[vr2turbo]

So dot 4 dry boiling point is 230 and wet is 155, so can quite easily boil up when braking downhill....

 

[6UE5t]

I'm using Bendix dot5.1 for the last 2 years now, noticeable improvement over regular Bosch dot4 especially downhill Genting.

 

[Izso]

I'm using Bendix dot5.1 for the last 2 years now, noticeable improvement over regular Bosch dot4 especially downhill Genting.

How much and where do you buy yours? I need a regular supply. I occasionally get the Ferodo one but my supplier doesn't bring it in that often.

 

[vr2turbo]

I'm using Bendix dot5.1 for the last 2 years now, noticeable improvement over regular Bosch dot4 especially downhill Genting.

What Difference in price against dot 4?

 

[Shinjite]

I'm using Bendix dot5.1 for the last 2 years now, noticeable improvement over regular Bosch dot4 especially downhill Genting.

What's the price bro?

 

[y2188]

Yup, spongy or even no brakes, pedal can just go down.....

Track different leh because braking hard, and only got one or two straights only, others all corners.....hahhahahha

Haha i always wonder that after extensive use of brakes, on a straight how much would the ventilated vents cool the brakes rotor down

Pedal feel is instantly different, like suddenly you need to press more to get the same amount of braking. And easier to fade. Very scary experience, will make you drive slower instantly. And gearbox overheated too that day.



When brake fluid boils, it boils the water in the mixture and introduces pockets of air, which in turns makes pedal feel crappy and spongy. Your brakes just aren't the same after that.

I totally understand it now...because my mom's first gen myvi always tend to have this feeling after few hard stops hahahahah

 

[Izso]

I totally understand it now...because my mom's first gen myvi always tend to have this feeling after few hard stops hahahahah

Myvi is due to a other things I suspect. Expanding brake hoses, flexing firewall, shitty brake pads, etc. I have 2 of these monstrosities at home both 1.3L so I know what you're referring to

 

[6UE5t]

How much and where do you buy yours? I need a regular supply. I occasionally get the Ferodo one but my supplier doesn't bring it in that often.

What Difference in price against dot 4?

What's the price bro?

Last time I got it for rm25/500ml bottle, previously about rm20 or 21. I bought it at a part shop in Ampang Point, just next to HSBC bank, but I bought their last stock of 2 bottles like over a year ago and since then I've never seen them restock again. Not sure if can order again thru them.

 

[hitz]

I'm using Bendix dot5.1 for the last 2 years now, noticeable improvement over regular Bosch dot4 especially downhill Genting.

Did you change your brake pump when you use Bendix Dot5? I thought our X can use Dot 4 brake fluid only.

 

[y2188]

Myvi is due to a other things I suspect. Expanding brake hoses, flexing firewall, shitty brake pads, etc. I have 2 of these monstrosities at home both 1.3L so I know what you're referring to

Yeap, exactly not to mention you have to press the pedal alot to feel the bite. The ori pads is good enough for stop and go traffic only imho, slightly more aggressive then it will start to fade....

 

[6UE5t]

Did you change your brake pump when you use Bendix Dot5? I thought our X can use Dot 4 brake fluid only.

Nope, just flush and change. Dot 4 is minimum requirement for our car, doesn't mean it cannot use higher which is dot 5.1.
It's dot 5.1 btw not dot 5, those 2 are different and you cannot use dot 5.

 

[vr2turbo]

I totally understand it now...because my mom's first gen myvi always tend to have this feeling after few hard stops hahahahah

That maybe brake fade? Try change the pads first......

 

[vr2turbo]

Last time I got it for rm25/500ml bottle, previously about rm20 or 21. I bought it at a part shop in Ampang Point, just next to HSBC bank, but I bought their last stock of 2 bottles like over a year ago and since then I've never seen them restock again. Not sure if can order again thru them.

Probably less users so they sell back dot 4

 

[vr2turbo]

Did you change your brake pump when you use Bendix Dot5? I thought our X can use Dot 4 brake fluid only.

Not dot 5 but dot 5.1. Best to flush the whole system and no need change the brake pump if still in working condition.
Dot 5 is silicone base fluid, so if want to use seems you need to change all the rubber seals...

 

[hitz]

Nope, just flush and change. Dot 4 is minimum requirement for our car, doesn't mean it cannot use higher which is dot 5.1.
It's dot 5.1 btw not dot 5, those 2 are different and you cannot use dot 5.

Not dot 5 but dot 5.1. Best to flush the whole system and no need change the brake pump if still in working condition.
Dot 5 is silicone base fluid, so if want to use seems you need to change all the rubber seals...

I see, ok next service will flush and change to Dot 5.1 also. Thank.