Big brake kits

[Lsxphil]

I am looking for advice on big brake kits what are people running and where did you buy from. I am looking for front and rear.

 

[Nas80]

I got ksports. 330mm all round 8 pot front and 4 pot rear with handbrake mech built in.

Fantastic powerful brakes. I got them used but I don't think it matters where you get them from.

 

[Sacrilegious-FD]

Audi b7 brembo 8 pots , 365mm

 

[4packet]

The challenge with BBK's is keeping the correct front to rear balance, the rear handbrake and not increasing the caliper piston size so the pedal travel becomes long and overly sensitive. Most calipers have a much larger piston area than stock, which is the opposite of what you want when going big diameter discs.

Stoptech do a great job for the front (it's what I run), by using smaller pistons to match the Mazda rear. Unfortunately they seem to have put their rotor ring prices up since I bought them and do not do a kit bigger than 332x32mm. They also don't have a handbrake solution for the rear, but did at one point offer a rear kit (group buy only).

I've looked a few times for a bigger solution and struggled. Depends what your usage/power is?

These guys provide a rear brake option, but not sure how much replacement rotor rings would be, or if they would always be available.

Sakebomb Garage Competition Rear Brake System (FD3S RX-7)

Sakebomb Garage is a specialty performance parts manufacturer and service shop specializing in the Honda S2000, FD RX-7 and ND Miata

www.sakebombgarage.com

 

[jdmr_neil]

I would go stoptech when i go bigger, i like the front kit and the balance has been proven time and again to be fantastic.

Just a shame it's expensive.

 

[Sacrilegious-FD]

Ummmm can't you just get a bias valve to align the bias

 

[karl_tate]

I've got some 4 pot brembo's with 355mm 2 piece discs to go on front and stock rear.

Yeh. Bias valve is built in with the stock lines and abs.

I have deleted the abs and put a bias valve in the rear brakes to reduce the pressure.

 

[Nas80]

If you buy the ksport 8 pot fronts and the 4 pot rears they do modify the rear calipers to use existing handbrake cables.

Brake balance is spot on too. I wouldn't go upgrading the fronts and leaving the weedy (in comparison) rear calipers

 

[4packet]

Ummmm can't you just get a bias valve to align the bias

Adjustable bias valves only adjust the point at which they begin to affect the rear brake pressure. They start at 50:50 FR balance then at a selectable point, allow the rear brake pressure to rise at a lesser, fixed rate relative to the front. Unfortunately this rate is not adjustable, so difficult to select the right valve for your system. An adjustable bias valve will help, but never fully fix the balance.

The function of OEM bias valves is to allow more brake pressure to the rear at slower speed/lower brake pressure. At higher braking forces where more load is shifted to the front tyres, the valve reduces the brake pressure to the rear brakes as the rear tyres have less grip.

 

[Sacrilegious-FD]

Fuck knows what I'm going to use, think I'm going to go hispec rears to retain handbrake, don't like the idea of my rear end overtaking me......


Will email them see what they recommend...

 

[4packet]

If you buy the ksport 8 pot fronts and the 4 pot rears they do modify the rear calipers to use existing handbrake cables.

Brake balance is spot on too. I wouldn't go upgrading the fronts and leaving the weedy (in comparison) rear calipers

I think the option to incorporate the handbrake into the rear calipers is great, but where have you seen the brake bias quoted? I can't find a reference to the piston sizes in the calipers. The only way to get the correct bias is to have optional piston sizes, otherwise the kit is the same for every car.

I've not seen a reference to the number and design of vanes on the discs. The images look like perhaps 32. Are they curved?

32mm rear disc is thicker than ideal too.

 

[Nas80]

Yea I'm just going on by experience of actually fitting them on my car. The rear brakes are smaller then the front and have different sized pistons. I didn't bother measuring them..

I've not counted the vanes but I can confirm they are curved tho.

The brakes work fantastic, dead sharp, great feel..no issues with them.

 

[MightyCondor]

There's no real need for big brakes on the rear imo. Having occasionally found the OEM fronts to be inadequate on track, moving to a 330mm ksport setup gave great consistent stopping power.

I did measure the pistons on the ksports and calculated that the 330mm kit is the right size to maintain the correct bias when still on OEM rears.

 

[4packet]

There's no real need for big brakes on the rear imo. Having occasionally found the OEM fronts to be inadequate on track, moving to a 330mm ksport setup gave great consistent stopping power.

I did measure the pistons on the ksports and calculated that the 330mm kit is the right size to maintain the correct bias when still on OEM rears.

The RS rears work OK, but the pads don't last long. 3 dry track days at best, which is the same as the fronts. I've only got the rears to last as long as the fronts by getting Ian at Carbotech to lay the friction material right to the very edge of the backing plate to increase the area. I've also added ducts to force air through the wheel to help reduce the operating temperature. The dust seals are still consumable as they go crispy. The discs (stock Mazda so far) wear unevenly, but credit to them, they don't surface crack.

I need larger front brakes really, which then poses a problem for what to do with the rears to balance them out.

 

[Charlie]

Hi, I have some K-Sport brakes for the front for sale if you're still looking for a kit for the front. I also have a set of Willwood rears I might sell

 

[GAVBEY]

Hi, I have some K-Sport brakes for the front for sale if you're still looking for a kit for the front. I also have a set of Willwood rears I might sell

330mm ones? I want to sell my 356mm ones for some 330mm ones so I can run 17" alloys

 

[shaunwil]

You can run the right 17in alloys over 356mm brakes. I'm running team dynamics 1.2 on mine with k-sport 356mm brakes.

 

[Sacrilegious-FD]

What are the specs on the rears @ Charlie

 

[Charlie]

I'll have a measure, they come with hubs since the kit uses a hub type hand brake, then 4 piston calipers for the brakes