Caliper swap/upgrade and brake pad combo for bias tuning

[ktm]

I recently completed the 300zx vented rotor and Toyota S12W caliper upgrade and replaced the drums with the 240sx caliper and 300zx solid rotor setup. I pieced the system together instead of buying a the package that Modern Motorsports offers. I did use their spacer and rear bracket though.

 

I was faced with trying to find a pad combination that would allow me to adjust my brake bias with the Wilwood proportioning valve. There are quite a few discussions regarding bias tuning and issues with the rears not providing sufficient braking force.

 

Modern Motorsports offers KVR pads with their package and claim that they are well matched with the S12W and 240sx setup. However, KVR pads are rather pricey when compared to Hawk HPS and Porterfield R4S.

 

I had a set of the KVRs for the rear that came with the setup I bought from a member here, but I was looking for something different in the front. Ultimately I picked up a set of the Porterfield R4S.

 

This combination, so far, allows me to adjust my brake bias. With the valve fully open the rears lock up first. After 2.5 rotations of the valve, I have the fronts locking up before the rears.

 

I am posting this because I could not find a discussion regarding pad combinations that worked for the disc brake setup.

 

In summary, the combination of Porterfield R4S' with S12W calipers and 300zx vented rotors and KVRs with 240sx calipers and 300zx solid rotors works well.

 

I encourage others to post their combinations as well.

[Miles]

I have the same brake set up using MM Toyota calipers and 300zx vented rotors front and 240sx calipers and 300zx solid rotors in the back. KVR pads in front and back. Also, a proportioning valve and a 280ZX MC.

 

The rear 240sx brakes aren't doing much even with the P Valve full open for the rears.

 

Has anyone else tried the Porterfield R4S pads on the front with KVR pads on the rear to help adjust front to rear bias?