I've had the front brakes from an SI and the rears from an LS for way too long now, and am now ready to install them.. The problem is that I had a few questions about the master cylinder and brake booster..

What is the size of the stock LS booster, and what size should I optimally use and what car can I get it from?

Is the stock LS m/c an optimal choice also?

Thanks so much in advance, everyone!

 

http://www.sohfast.com

 

the LS booster should be fine. actually a stock ex one works well too, that's what I'm using. no complaints.

 

Sounds good, how about the master cylinder? LS one also? thx

 

 

I have Teg front calipers, disc rear calipers, stainless brake lines, and Castrol SRF brake fluid. The front rotors are 11.2" and the rear ones are 11.4" (both these are thanks to caliper relocation brackets from http://WWW.Fastbrakes.Com).

I am using the stock EK hatch CX master cylinder, brake booster, and proportioning valve, and my brakes could NOT be better. The pedal is firm, it does not travel more than about 1" for normal stopping power, and when I get on the brakes, it goes maybe another 1/2" to get maximum stopping power. My pedal has never gone beyond 1/2 the full travel, even under repeated hard stops, and I have never had any fade. I am using AEM front pads and Honda OEM rears. I would reccomend a better front pad if you are doing lapping. The AEMs overheat pretty easily. I had Hawk HP+, but they dusted too much for my liking.

 

i have an ej and am about to do the rear conversion i have SiR rears will i need a master cylinder and propo valve?????

 

Not necessary. Let me tell you, swapping prop valves is a pain in the ***.

 

The only difference a bigger bore MC makes is less pedal travel. The CX MC will perform fine. The smaller bore means you have to push the pedal down farther to achieve the same clamping force as a big bore MC.