usafstud

afzan

if used with stoptech front bbk (or any non-SBG) your brake bias will be off, it hints towards that on the link you provided:
" *NOTE: This rear brake kit has been designed to be used with our AP Competition Front Brake Kit or Street brake kit running a 325x32mm rotor. Installation of this rear kit with stock front brakes or other aftermarket front brakes is done at your own risk. Due to the increased rear rotor size and caliper piston size, rear braking force is increased as compared to stock. If you are running stock fronts or aftermarket big brake kits with undersized pistons, we recommend installing a lower coeffecient friction pad in the rear to compensate for increased rear bias. Optionally a proportioning valve may be installed with setups other than the SBG AP Front Competiton or SBG Street Brake kits so that you may safely and correctly adjust the rear brake bias . Installing this rear brake kit with any front braking system other than SakeBomb kits made to pair with this competition rear kit is done at your own risk. "

tut4u2

What questions do you have about them? I've been running them for a while now with the sbg wildwood kit.

usafstud

tut4u2

I got 19 thirty minute sessions out of the rear pads last time I replaced them so 4 track days. They could've gone another track day but I was replacing the calipers so I changed the pads while I was in there. These were dtc50s while running federal 595rsrr tires.

​I haven't replaced the wheel bearings yet so I can't comment on that.

bgoetz

tut4u2

I bought the calipers used off ebay and had 2 issues:
1. The piston dust boot got torn
2. The brakes would drag occasionally and make this awful noise whenever I would go in reverse; the latter issue is still present even with the new calipers.

I ended up getting reman'ed calipers off eBay for $115 shipped. So far I haven't had any issues with them the exception of the previously mentioned noise while going in reverse.

Nate Tempest

Does anyone know definitively whether this is still an issue for cars with EBD (2006+?) It seems like it shouldn't be; in theory it should allow you to put any rear brakes in, and the system should optimize the bias automatically. It would be nice to confirm that though.

DanielB

I built this tool to analyze how brake bias is affected by the various kits available. As afzan and SBG point out, the kit has more torque than stock by 20% and hence SBG properly warns not to use it with stock front brakes.

Information on the Stoptech kit is sketchy. Rotor diameter is specified as 345 mm and the calipers are ST-41. However, the ST-41 can support pistons ranging from 26mm up to 42mm. Link. Assuming the kit uses a 26mm piston yields a change in brake bias vs. stock of only 1%. Larger pistons could of course be used to get closer to the SBG kit if that's what you want. The point is that without more info, you really can't know how bias will change. I'll add that for a company of Stoptech's reputation, it's really surprising how difficult they make it to get the detailed specs on their kits. Contrast to Wilwood who makes is quite clear and easy.

Last, I have not used the SBG rear kit but have their front Wilwood kit and have been really happy with it. It's a quality kit with good engineering. They do their homework.

ckowalc

Not sure which kit you are looking for but this thread has specs/piston sizes on the standard kit (ST-40 328x28):
https://www.s2ki.com/forums/s2000-ra...ch-bbk-909159/