ghoffman

We now have a rear rotor for C5/C6/C6Z that has an aluminum hat (with a Mil-spec coating for the parking brake), directional curved vane rotors and weighs only 14.2 pounds! This is a 5 pound saving over the C6Z rotors and a 6 pound savings over the C6 rotors (each!). It is a direct bolt on with no changes necessary for stock C6. It can be used on C5's with a change in the caliper bracket from the original to the C6 version. As with all Hardbar products, we use nothing but the best engineering, design, materials, hardware and of course, is 100% made in USA. We did no less than 6 load cases on this, and am only showing one. Here are a couple of sneak peeks at it, (more pics to follow). Available in February, 2009.

Z06Fix

Very nice.

C66 Racing

Gary,
I'm guessing that those aren't going to be legal in SCCA T1.

Very nice looking rotors though. Maybe I'll pick up a set for DE days....

RC45

Gary - please remember to put aside a set to match my Hardbar front rotors

AU N EGL

gkmccready

And a working parking brake? Very cool!

ghoffman

Absolutely, yes! Unfortunately, the C6ZO6 stock PBR caliper cannot be made to fit, it hangs down too far and the clearances here are already VERY tight for the bolt heads and hat. Note how the AN (aircraft)fasteners have the bolt heads "captured" and cannot rotate. They are sized correctly to have no threads in shear and we use Nordlocks under the nuts. Also, note the rotor and hat interface area is minimized for optimum heat transfer (isolation) into the hat. Again, we focus all of our time and money on solid basic engineering principles, state-of-the art CAD and CNC machine work and back it up with testing.

Here are a few more pics:



In this pic (again, before coating) you can see how close the tolerances are, and 12 point jet nuts will be substituted on Thursday this week.

naschmitz

I got to see these in person today and they are top quality like everything else Gary designs. They look like they belong on a fighter jet. Parking brake works great too.

mgarfias

Gary -

Any idea pricing yet?

stevenm357

wow, amazing. any figures on how much faster braking will occur? or how much of a parasitc loss in hp this will remove?

ghoffman

About the same as our fronts, the hats are more expensive, the rotors less expensive. As a rule of thumb, the pair will be roughly equivalent to 70-100 pounds of vehicle weight reduction. Chris Ingle just found out at Road Atlanta that 100 pounds was with almost 1 second. It is non-trivial! Also, I have located a source for titanium fasteners in this size and that will take off an additional .2 pounds of rotating mass. That kit will be about $50 extra per rotor asembly (and that will include the Ti fasteners, Nordlocs, and 12 point "jet" nuts).

Silverton

Gary,

What is the rotor diameter, and what calipers will work with it (you're showing a Wilwood SL-4R)?

MJM

Gary,

Your stuff is always top notch!

Any market for C5 front rotors in stock size?

Thanks,
Matt

ghoffman

This is a 13.3 diameter, 1.0 inch wide, but 13.0 will also be offered. We are still checking, but the C5 OE caliper should fit when using a C6Z51 caliper bracket (the calipers are the same). Almost any aftermarket radial mount caliper will fit, only the C6ZO6 caliper does not so far. On the 13.3 inch rotor you have 2.30 inches from the radius of the rotor to the radius of the hat.
Thanks Matt, I have been thinking of doing a 13.0 front for C5/C6. I need to know what the distance is from the top of the pad to the bottom of the caliper bracket to determine the maximum hat radius. If you can measure that, it will speed the process for me. Thanks!

mgarfias

If Matt can't do it, I'll measure it when I'm home from my thanksgiving trip as I'm interested in having a better set of rotors/calipers that fit under my stock fronts.

RC45

Ouch - sorry to hear the C6 Z06 rear calipers wont fit

ghoffman

OK, these willl be the only ones made like this, I have redesigned it so that the OE C6Z and slide rail C5/C6 calipers will now fit. Pics later!

Speed Direct

Nice looking parts, Gary.

ghoffman

Thanks! We moved the hat flange to being inboard of the rotor and using some Aerospace unique fasteners (that are basically unknown to the automotive biz, but you see them every time you board a Boeing 737 around the door) we are able to get a totally flush face on both sides. This way, it can accommodate any caliper that comes on the Corvette, slide rails included, without compromising cooling and uses standard rotors. I wish I had thought of this before the above prototypes were made, but, oh well, this is fine for the Wilwood, PFC or AP calipers that I might use.

BrianCunningham

Now that's an invative solution!