11.8" S2K S2000 Caliper and RSX-S, EP3 Si rotor big brake upgrade

ASSISTANCE Suspension, Brakes & Wheels
1

I haven’t seen an upgrade guide yet for the S2K caliper/RSX-S rotor combo yet so I thought that I would put one together.

Fronts

Tools needed - 14mm socket, 17mm socket, needle nose vise grips, old fuel line, screwdriver wrench, bottle of brake fluid.

1st - You are going to need front calipers from a 02 and up S2000. I sourced mine from ebay. Front and rears for 149 shipped.

2nd - 11.8" Front rotors from an 02 and up RSX type S re-drilled to 4x100

3rd - You have a couple options to correct the rotor offset. It is 3mm off center for the caliper to work correctly.
Option 1 - Take your caliper brackets to a machine shop to have them mill 3mm off the side that contacts the hub. This will push the caliper back further and allow the rotors to be correctly aligned.
Option 2 - This is the way that I did mine. Take a 3mm wheel spacer and cut it to fit inside of the rotor. This will go between the hub and the rotor and push the rotor further out for the same desired effect.

If you use option 2 then it becomes a completely bolt on affair.

Disassemble

Use needle nose vise grips with old fuel hose on the teeth so they don’t damage the brake line hoses and pinch the line closed as close as you can to the caliper with enough room to take the bolt from the brake line to the caliper off. (This will save you much brake bleeding later on)

Remove 14mm bolt from the brake line to the caliper and set aside. Make sure to do this first because it’s much harder taking it off after the caliper is removed.

Remove the 2 17mm bolts holding the caliper to the hub.

Discard old caliper.

Use the screwdriver wrench to take out the rotor screws (sometimes they can be a PITA if you don’t have this tool)

Take off the old rotor.

Reassemble

Put the trimmed wheel spacer on the hub first. The lug bolts will hold them in place.

Put your new 11.8" rotor on.

Attach the new S2K calipers to the hub.

Bolt the brake line back to the caliper. Don’t forget the solid washers on both sides of the bolt attaching the brake line to the caliper.

Have a helper assist in bleeding the new calipers. Don’t forget to keep topping off the reservoir while bleeding.

Enjoy

Before

After

Rears to come next weekend.

2

Why upgrade to that size rotor? The stock rotor is 11 inches already. That little bit more of surface area isnt going to make a crazy difference. How many pistons is the s2k caliper?

3

looks like it’d barely clear a 15" wheel if it would

4

Stock rotor is 10.3" - surface area is = pi*(r) squared or pi5.155.15= 83.3 square inches
Legend Upgrade 11.1" - pi5.555.55 = 96.8 square inches
My new rotor is 11.8" - pi5.95.9 = 109.4 square inches

Both have the roughly the same point at which the braking surface actually starts. Which means that I have over 25 square inches of extra breaking surface than a stock setup.

Still a single piston caliper.

5

I’ve been told that it will clear SOME 15" rims, mostly high end racing rims though.
I like the look of 16s on my car so it doesn’t really matter to me.

6

i really doubt any 15" rims would clear that… even the legends only clear some 15’s, and they are almost an inch smaller

7

kosei k1s clear my friends willwood brake set up, but I am not sure how big his rotors are.

8

Did you just keep the stock master cylinder>?

9

FYI there are some guys I know who make the 3mm spacer you mentioned. So you don’t have to take a normal wheel spacer and trim it down. I can’t seem to find a link but if anyone’s interested I could probably find it, or at least put you in contact w/ them.

10

This is a cool write up. Had no idea people were doing s2k/rsx setups aswell. Colin you think you can find that link!? I came across this write up and thought it was cool to. check it out
-Drew

http://www.team-integra.net/forum/19-projects-diy-article-talk/209631-diy-no-bs-bolt-big-brakes-rs-gs-ls-gsr.html

11

I did an abs delete on my car so I was already working with a 1" master cylinder.

12

Here ya go: http://forums.nwp4life.com/zerothread?id=19453

13

Thats wierd i just went and measured my rotor and it measured atleast 10.8" that was with it attched to the hub so not to accurate, but definently not a 10" rotor. So i dont really see this as cost effective compared to a 12" wilwood kit. Which is way better then this combo. Sorry just not buying the oem thing here. People this is why you shouldnt just listen to people on the internet

14

This directly off of autozone dot com

262 millimeters = 10.3149606 inches

And the $350 I spent on it is for the 11.8" front and the 10.3" rears including all four calipers

Now if you want to spend a grand on just the fronts that are about the same size as mine be my guest. I’m just trying to help out people that don’t have $995 (on Ebay) to get factory quality without the cost.

15

Damn those are way better than the hack job I did on the wheel spacers. I wish I would have known about them before. Good thing I only spend $9 bucks including shipping on them or I would feel even worse.

16

Hmmm… You must have seen a side by side comparison on the Wilwood 12" vs my 11.8" set up at 60-0 mph and 100 - 0 mph, that I’m not aware of. That would really be the only way to make such a stong a statement as [QUOTE=Swhangin;2249274] Which is way better then this combo.[/QUOTE] Just sayin…The difference in stopping distance would have to be astronomical for me to justify spending another 700 bucks.

17

Stock brakes are just fine for daily purposes. Not to mention most people that do wilwood or other brake upgrades to look good. I did the itr brakes because i needed it on the track so i can brake late and also be cost effective as well. How many people you know that have spoon calipers actually use them for the track. Most of them are shiny with no dust on them. I think i make a pretty valid point on this.

18

Exactly, I did mine for the bling factor. I needed to change out my rotors and my calipers were leaking anyways. Might as well. Go big or go home, son!!

19

In that sense its good time to upgrade since you would spend almost the same money on buying remanned new stock stuff. But on the baller big brake upgrade issue there are very few people who actually put them to use on the track.

20

I wonder what stops better? This or the dual piston Legend GS brakes?