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You'll need to know what the size stock rotors you're comparing to what size Wilwood rotors.
And to an extent what kit you're looking at.
The basic 11.75 and 12.2" kits use a .810 wide rotor.
The DP6 13 uses a 12.88 x .810 disc
The TCE/Wilwood a 13 x .810 disc
Any of the larger kits are going to have a far less usage level than the smaller kits. In turn the smaller kit should prove longer lasting than the smallest of the oe rotors.
Pads much the same: there are three different pads from 12mm to 16mm to 20mm thick in the various brake kit options. Cubic inch wise the 12 and 16 are similar, the 20mm pad much more cubes. Life will be based on cubes/cost.
Two of the three Wilwood (and TCE/Wilwood) kits are top loading making that pad change quick and easy. The DP6 and stock caliper must be removed. Seeing that you'll need (rightly) both street AND race pads time is money.
Replacement "rings" or rotors on the 2pc will run from $85 to 135ea. Stock parts from Autozone; far less. But if the others last 3X as long or more, and lower operating temps, and flow more air, and are lighter, better pedal feel and modulation....you get the idea.
Comparing is fine but it's not a direct comparison really. Brake kits are almost always going to be more efficient. If they cost a bit more to do so that's just part of what track days are. Much like comparing an all season tire to a performance or R compound. Sure the all season lasts longer but if it doesn't perform as you need it there's no reason to use it.
I'm only concerned with operating costs for now, pads,rotors/tires eat up the budget, so if wilwood last twice as long and cost twice as much there's no reason to upgrade from the JCW brakes
it would be 11.75 rotors, I am sticking with 15" wheels the jcw are 11.5" I believe, 294mm
car has basically zero street use now, driven to the track that's it, and will have brake cooling/ducting installed this weekend
Rotors cost me 35 $ a pop, but pads are expensive for jcw brakes
15s will narrow the cost/value equation a bit. The rotor size being only a tick larger you won't see huge gains in torque. But the added cooling and side benefits of the caliper change offset much of the rotor costs also.
$35 vs $105ea 3X the cost. There's no way to predict a life of 3x on the brake kit. But as I say; if you're buying only for the life of the part you're missing out on many of the benefits of the bbk. On the other hand rotors as a disposable part are hard to beat.
There's "no fee lunch" on either option; you have pros and cons to both that arguably are important or more so than just the cost of the rotor. Example: you're boiling fluid in the iron caliper and the pedal feel is inconsistent. On the other hand the alum caliper with ss pistons shed and reject heat better while offing a better tactical feel. If that's not worth the increase in rotor costs that's fine, just know what you're giving up.
All that being said there's a reason we build the special order TCE 11.75 kit.
The TCE version has .980 (referred to as 1") rotors, a different caliper part number and a modified hat. This one WILL last you 3X the life as a factory part and I doubt you'd have much issue with heat but for the most hard core track runs.
More costly rotors later at $185ea too.
And the overall kit will run about $1100. But this, for the 15" guys, is pretty much a one-n-done purchase.
do you know if those fit under 15x8 and 15x9 949racing wheels? I'm going to assume they are very very close the the same size as R53 JCW brakes, those do fit under 949wheels
YOUR 15" wheels...that's something you'll have to look at the wheel fit diagram on page three and compare to the SHAPE of the wheel spokes. The issue is not diameter so much as it is the wheel shape.
