3 Disk brake setup

[Error401]

Has anyone set up their brakes with 3 disks, 1 on front, 2 on rear? I've messed with my brakes on my K3 till I'm blue in the face and still can't get the rear to act like I want. I changed my servo from a Futaba 9401 to a HiTec 645MG and still cant get enough brakes in the rear. Adjusted the linkages with similar results. I'm running a 5 cell hump, so it's not a power issue.

Anyway, I was thinking that if I put a second disk on the rear, I should get more braking back there with less effort from the servo.

[Çh®i§tiªñ]

I thought the K3 went back to a single disc setup?

Just adjust for minimal DRAG brake in the rear, and when it brakes in, you should be fine.

[Error401]

Yeah, the K3 has single disks front and rear. I drove EP's K1 and kind of liked the added braking of dual disks on each side, but I'd have loosened the front a tad if it were mine.

[cbreaker]

Weird. I have a JR590 in my throttle position and I can set up the linkage so the rear tires completely lock up when I brake with my storm.

Maybe try a hopup brake pad like hardcore racing's or something?

[bill61]

I installed the dual brake set-up front and rear on my K3 and it works perfect. I have it set so the back will barely lock up if I give it full brakes. I am using the 94358z for both steering and brake/throttle, so I will never have a shortage of power.

[Error401]

Bill, do you mean that you have 2 disks for front and 2 for rear, or just 2 total? I liked the old K1 brake setup, but the single disks (for each half) seem to fade alot due to my driving style and track.

[bill61]

Error401, I put two hardcore titanium disks on the front and two on the rear.
My line of thinking was that with the two disks there would be less of a load on the servo, pads, and disks themselves thereby reducing wear. I could be full of it, but like I said the brakes work perfect for me. If I want all the tires to lock up I'm sure that I could set them to easily. Something that is kind of cool is you can hear the brakes come on, even over the sound of the engine.

[Error401]

That's exactly what I was thinking. More pads, more brakes per same ammount of effort from the servo. It should also reduce fade too. I might get a set of K1 disks and try it out. If I really like it (which I'm pretty sure I will), I'll probably get some Ti disks.

What do they sound like?

[bill61]

They make a kind of shhhhh sound. I first noticed when I was breaking-in my engine. As I was running it back and forth I thought why not wear in the brakes to seat them also?

[Error401]

That's cool, I had envisioned that sound 1:1 brakes make when they need replacing. I can hang with a shhhhhh, but not an EEEEEEEEEEeeeeeeeee.

[bill61]

I don't think I could hang with the EEEEEEEEEEEEeeeeeeeeee either.

[robriguez]

a sort of off topic question... why do you want more braking in the rear? Is that so you can swing the rear end around a turn? I solved that by putting a bit stiffer springs in the rear and 50wt oil in the shocks. I can swing the rear around the tightest of corners with just a tap on the brakes.

[Error401]

tried that. Running 30/50wt front and rear, with preload spacers (about 9/16" or so) on all shocks. And yes, that was kind of my aim. On extremely loose dry surfaces the brakes are fine, for most of a tank, but start to fade after the last 1/2. On the track I run at, the surface is watered sticky clay and the brakes fade pretty quick, almost to the point of nearly not having any. I let it cool and they come back, mostly.

[dgrobe2112]

I run with 1 brake pad in front and rear on my K2.. and have no braking problems.. i think having dual discs require you to have a stronger servo.. to squeeze all that rotating mass together.. but i run 1 brake disc.. with no prob..

i run more brake in the rear so i can swing the rear around.. and a little brake in the front for turns right after a jump..

shocks are 60weight in the front and 40 in the rear.. with spacers so the rear is level.. and the front is above level.. setup is hooked on everything.. i usually dont have to change anything except on a highbite track.. i will stiffen the car some.. with 70 in the front 50 in the rear..

[rs43drifter]

my x-terminator has 3 brakes and i can lock down the wheels in a heart beat but i like a little bit of sip so i just adjusted the likage