2021+ 4-piston rotors?

[Mach VII]

It says Left, Right meaning either side. Directional rotors would be interesting lol

When I view the posted link via laptop is see this:

When I view from my phone is see this:

Starting to think I'm losing my mind lol

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[ice445]

When I view the posted link via laptop is see this:

When I view from my phone is see this:

Starting to think I'm losing my mind lol

Probably just a browser thing, I see what you do on your phone lol

 

[Optimum Performance]

I've seen some threads here mentioning that 2021 and newer had corrected the cooling of the OEM 4-piston rotors.

Is it possible to buy those OEM replacement front rotors for an older Mustang?

RockAuto is showing BRRF447 and BRRF439.

It looks like BRRF447 is vented inside based on the pics I get from googling but I'm not 100% certain.

Can anyone confirm?

I know there's 6-piston take off kits, and I understand that I would need the control arms and belly pan to get full brake cooling performance, regardless of what path I chose.

Mike, BRRF448 Should be the ones you want.

 

[AllthePonies]

NO, there is no reason to cool from the outside. the brakes can and will overheat on a 1/4 mile shut down.

It is a cost saving move only.

I didn't have my base model a month until I bought Steeda's 2 piece rotors due to overheating my brakes on the street.

How it saves money I don't know.

Here’s an explanation for the vanes being on the wrong side:

https://www.mustang6g.com/forums/threads/rotors-with-inverted-cooling.109866/page-2

 

[TeeLew]

How it saves money I don't know.

Warranty issues. A better cooled disc sees more heat cycles. If you keep the brake artificially hot, then the operating temp is higher, but more consistent. If you're accelerating and braking with traffic, you'll never see fade, but you'll reduce the possibility of cracks and warping.

Take it to the track, though, and you're screwed.

 

[Optimum Performance]

We bought one and confirmed the correct part number.
I have attached our BLOG POST about it.

 

[MrMike]

We bought one and confirmed the correct part number.
I have attached our BLOG POST about it.

Thanks! This actually makes keeping the 4-piston brakes a reasonable option. Just need to grab some more aggressive pads and good to go.

 

[shogun32]

I have attached our BLOG POST about it.

do you have a post about 'track' pads for the 4-pot? Seems the pickings are mighty slim.

 

[Optimum Performance]

do you have a post about 'track' pads for the 4-pot? Seems the pickings are mighty slim.

FRONT Pads

 

[BlackandBlue]

Well that is clear as mud.

It’s standard hat vs reverse hat. Standard hat has the cooling on the wheel side and reverse hat has the cooling on the suspension side.

The benefit from standard hat is the rotors won’t warp like reverse hat. Standard hat rotors have a straight mating surface with the wheel and rotor which causes heat cycling to be very symmetrical and resist warping. Reverse hat has a step that curves to meet the mating surface of the wheel and hub. This allows the better cooling on the back but also causes the rotor to be more susceptible to warping due to heat cycling.

Long story short, standard hat rotors will feel smoother much longer but heat soak much quicker due to not being able to get clean air to cool.

 

[TeeLew]

do you have a post about 'track' pads for the 4-pot? Seems the pickings are mighty slim.

100%, that's the issue. EBC has some options. I run the blue pad for normal running around, but I don't know if they make the same pad in actual track compounds.

A 14" disc is still pretty big. I think if you're trying to actually race, you'll want the biggest brakes you can find for heat management. For autocross/track day work, the 14's should be fine once they have reasonable cooling air on them.

 

[K4fxd]

For autocross/track day work, the 14's should be fine once they have reasonable cooling air on them.

They do work fine. Although I have the 2 piece rotors front and back I've never wished I had more brake. I like the reduced weight.

I could see the rears on the 21 up overheating since they still are reversed cooled.

 

[Mike Pfeifer]

They do work fine. Although I have the 2 piece rotors front and back I've never wished I had more brake. I like the reduced weight.

I could see the rears on the 21 up overheating since they still are reversed cooled.

Are the rear rotors on the PP1 cars different than the regular GT? I believe the calipers are the same other than paint, right?

 

[shogun32]

Rear brakes are all the same, even mach1, except eb without pp.

 

[MrMike]

100%, that's the issue. EBC has some options. I run the blue pad for normal running around, but I don't know if they make the same pad in actual track compounds.

A 14" disc is still pretty big. I think if you're trying to actually race, you'll want the biggest brakes you can find for heat management. For autocross/track day work, the 14's should be fine once they have reasonable cooling air on them.

I used EBC RedStuff on my Z years ago and was satisfied. I would just try RedStuff on the Mustang.

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