kos

Has anyone ran the Paragon rear 2pc rotors? No caliper bracket trimming / machining needed, nor any need to preshave the pads down. They are a solid disc, but with an aluminum hat.

http://paragonbrakes.com/2-piece-rot...r-honda-s2000/

Bullwings

Renegade BBK info, F/R from Grip_Skiddly's build thread.
https://www.s2ki.com/forums/automoti...1185948/page4/

Car Analogy

Only slightly less expensive than Urge vented rear rotors, but few of the benefits.

Similar.weight savings compared to Urge, but no improvement in cooling. Perhaps some slight benefit from top hat not conducting as much heat as stock into hub.

But for a little more $, and the inconvenience of dealing with shaved pads, you could get massive improvement in rotor cooling.

Bottom line, most of the cost, hardly any of the benefits, compared to Urge.

Setsuna

Hi, quick question. stock is floating caliper, but other BBK is fix caliper, which means those BBK has double piston area for each side. Why does you only calculate the on side of it.

Car Analogy

why only use one side to calc caliper piston area?

Setsuna

Oh, thanks, but for the effective radius on brake torque, he is half the height of the brake pad, which is controversial from what I learned. My understanding is that effective radius = rotation diameter/2 - Brake pad height.

Car Analogy

The point of this entire endeavor is to compare stock brake bias to brake mods bias. Therefore the method used to perform comparis is much more important than the actual raw numbers.

He uses the same process to measure effect brake force of stock components that he applies to aftermarket.

Wheelman_99

Great topic and spreadsheet!

However, what about the effects of the fluid volume required for each caliper? Was this taken into account anywhere? Is this a non issue on S2K because of the diagonal split in the master?

Car Analogy

You mean the ratio of mc piston to caliper piston? Yes, that affects hydraulic leverage, much like changing rotor diameter changes mechanical leverage, and is an integral part of how the bias is being calculated.

If you meant how do we make sure the total swept volume that mc can supply is sufficient for all these extra caliper pistons, that isn't a thing.

While there aremore pistons, they're smaller. Unless you're using calipers that throw bias way off scale, fluid volume is in same ballpark as stock.

If you're calipers need more volume than mc can supply, your bias would be so far off car wouldn't be drivable