Good info here.
Some experience on my part... C4 PBR's all the way around with 13" rotors up front, 12" rear, on a 3250lb (no driver) '68 Mustang, ~625hp, on Hoosier slicks with brake ducts in front and running The Brake Man #4 pads works very, very well for 20 minute HARD track sessions with a very aggressive driver. One thing you need to remember is take a cool down lap so ambient heat doesn't bake the rubber dust seals on the calipers when you park it in the pits.
C4/C5 brakes for "casual" track days work very well when paired with good pads especially when cooling ducts and hi temp fluid is in place.
I think a C5 setup with good pads (maybe consider a set of track wheels-- certain race pads and their dust can be quite corrosive to wheels especially if the dust gets wet) and cooling ducts will do the job for you. Run good hi-temp fluid like Motul or Wilwood (fresh just before the track day.) If you mix and match pad brands (such as having a street pad you run and then some race pads) you may also want another set of rotors that stay bedded to those particular pads. However, I do know that Carbotech advises you are OK to switch pad compounds as long as you stick with their stuff without having to re-bed-- that's nice! Running race pads on the street has drawbacks too, not getting them hot enough can often lead to amazingly fast rotor wear.
Be warned of the other probable heat management issues I bet you will have... heatsoaking the radiator & engine, you'll probably need a big tranny cooler, and being turbo'd you're guaranteed to need a LARGE engine oil cooler as well. I would also be willing to bet that you'll end up melting some of the "soft bits" under the hood from heat exposure from radiant heat off all the turbo plumbing under sustained use/abuse on the track. Also, did you put inconel exhaust valves in? Under roadcourse use with turbos you might "tulip" a set of stainless valves, I see it on boosted boat applications.
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1969 Chevelle
Old setup: Procharged/intercooled/EFI 353 SBC, TKO, ATS/SPC/Global West suspension, C6 brakes & hydroboost.
In progress: LS2, 3.0 Whipple, T56 Magnum, torque arm & watts link, Wilwood Aero6/4 brakes, Mk60 ABS, Vaporworx, floater 9" rear, etc.
Last edited by Blown353; 08-30-2006 at 02:33 PM.
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