Originally Posted by ThePass (Post 1230502)

Apples to oranges.

The following is of course all things that you know, but for clarity purposes for those following along...

The wilwood standard rotors are straight-vane, made in China, low-cost rotors. Easy to acquire, easy on the wallet. Not comparable to a high-grade motorsports rotor though.

The approach with the GWR BBK was to offer the most bitchin' rotor possible - hence, on Version 4 of the rotor now (10 attachment points, kangaroo paw "vanes", ideal iron composition), and most owners get many, many years out of one set of rotors and we've had zero reports of rotor coning, premature failures, etc. that are far more possible with budget rotors.

There IS a high-quality replacement for the wilwood 8-bolt 11.75" friction ring. It's from PFC and it's ~$200 per ring. That is an apples to apples comparison with the V4 friction rings from DBA. Obviously, rotor diameter differences apply.

-Ryan

Originally Posted by k24madness (Post 1232016)

The rotor diameter is a big part of the advantage of the trackspeed kit IMHO. Because the wilwoods flex having a larger rotor diameter means less hydraulic pressure (ie less flex) per xxx pounds of wheel torque. My maths says 10% less. That should help those little wilwoods quite a bit.

Love the DBA's though. Would rock them if there were a 11.75" version.

Originally Posted by OGRacing (Post 1232359)

the rotor diameter doesn't pay a roll in caliper flex. a dynalight caliper will flex the same amount @ 200* on a 11 and 11.75" rotor.

Originally Posted by curly (Post 1231210)

Even 6uls need 5mm spacers.

Originally Posted by Savington (Post 1232399)

But the force required to flex that caliper generates more braking force on the larger rotor. The same caliper on the larger rotor will require less pedal pressure to achieve the same braking force, and thus the caliper will flex less.

Originally Posted by OGRacing (Post 1232458)

yes i guess. but a larger rotor isn't necessarily a fix for a flexy caliper.