Mc556

My wheels are piano black so they show everything. The dust isn’t bad, but I usually wash the wheels off after a mountain run.

Kubs

If you are concerned about dust on the street, look for HB453Z. The Performance Ceramic compound still gives great cold bite and feel with much less dust than the HPS 5.0. I use the PC compound on the street with my Wilwoods and DTC-60 on the track. I have to clean the 60 dust off after each event.

Stingroo

This is great. I'm about to do the C6 Z51 rotor swap for my car but this is definitely a sweet upgrade. Might have to look into this next time for the front.

Kubs

Keep in mind the C6 Z51 uses a smaller piston on the rear caliper due to the larger increase in rotor size on the rear (+0.5" front, +1.0" rear). Using the C5 caliper with the larger rear rotor might create some unwanted rearward bias on track.

Stingroo

I saw that. I snagged a set of rear calipers to go with in case it becomes an issue. Friend of mine upgraded his car to C6Z stuff so I had some pickings.

JHrinsin

Correct the C5 & C6 base rear caliper has a 45mm piston, while the C6 Z51 rear caliper has a 42mm piston.

One other thing to keep in mind is that some folks have found the C5 & C6 base 12.0" [305mm] rear rotor to be a bit undersized in thermal capacity at the track when matched up with a HD front brake upgrade and track pads. The stock replacement 12" rear rotor only weights approximately 14-14.5 lbs, while a plain, non-cross drilled aftermarket version of the C6 Z51 13.0" [330mm] rotor weighs closer to 20 lbs. Now that would normally be a red flag with that much increase in un-sprung weight, but the increase in thermal capacity can also be greatly appreciated. On a dedicated track car, some of that weight increase can be offset by the use of a 2-pcs rotor and even elimination of the emergency brake setup, if the rules allow. Of course you can also fine tune the balance of most any brake set up by using a less aggressive pad material on the rear axle. As always, YMMV.

Kubs

Based on my hand calcs the Z51 rear rotors with a 14" rotor on the front is the same front to rear bias as stock, with the C5 rear caliper. I went to a Z51 rear rotor and C5 caliper when I put my Wilwoods on the front. However, Z51 size track capable rotors are hard to find because they are not popular. I just bought the last 2 DBA 4000 series rotors KNS had on the shelf and it doesnt sound like they plan to restock them because no one buys them. I might need to find something else that works and is more readily available long term.

The ATS Brembo has larger pistons so the setup discussed here will be more front biased (approximately +5%, +3% WITH the Z51/C5 rear). It might be better to find a solution using the larger 13.4" C6 Z06 rear rotor to help offset the front bias. Z06 rotors are easier to come by, but will not fit inside the Z51 caliper abutment bracket.

JHrinsin

Okay, so you got those Mike. I may have to pick up the few remaining C6 Z51 Centric 125 series (plain, non cross drilled) rear ones left there. 😉

Kubs

Centric blanks are a good option also. Not as good, but still hold up well.

Mc556

That’s great info I’m glad to see this thread not flame out yet. I had ordered a set of the rear z51 brackets to run that larger rotor but I would love to find a solution to run the 13.4
Does anyone here have any theories on what might work? I don’t know anyone with a c6 z06 to pull measurements off of. With the C6 and C5 having so much in common I’m betting there has to be something that could be adapted.
To me this part of the fun of the hobby. It would be easy to just write a check for something out of the box.

Stingroo

The C6Z caliper bolts to the C5 spindle with no mods. It doesn't use a bracket like the C5 calipers do. So you could have 14" fronts from ATS and C6Z06 stock stuff out back in theory.

JHrinsin

Just one question, considering the C6 Z06 front 6-piston PBR caliper and 14" rotor bolt right up to the C5 spindle with no modifications required and you can buy aftermarket 1-pcs pads vs OE designed the multiple padlets, what exactly is the advantage to going with this ATS 4-piston Brembo caliper setup?

Bigbrake

The C6Z06 calipers are discontinued and they are fairly rare to source even reman so it`s a supply issue. The ATS is available and cheap, you can even use the C7 base JL9 caliper to get the right Logo "corvette" It`s an option but (ATS on stock spindle) - but you do have the pad overhang so your shooting yourself in the foot somewhat by not utilizing the whole pad and rotor surface area which is not there on a Z06 C6 rotor. The whole point of a brake upgrade is to increase these area`s and then you have to run a 2 size larger wheel than that caliper would actually fit into if it were on the proper mounts (12.6 rotor) will fit into a 16 inch barrel. It`s a solution but with it's drawbacks no doubt

JHrinsin

Fair enough. As a point of reference, I went with the very versatile C5/C6 Wilwood #140-12629 front kit; with Aero6 calipers and mounting brackets with spacers that allow you to use either the stock 13.4" C6 Z51 rotor or the stock 14.0" C6 Z06 front rotor.

Bigbrake

Do those Aero 6 calipers have dust boots on the pistons ? I know Wilwood had started offering some calipers with dust boots but they were not on every caliper since most of their stuff is really meant for competition use with little to no regard for street use (where you would hit the occasional weather) - dirt, water sand etc...

Kubs

The Wilwood Aero 6 do not have dust boots. I ran my stock calipers without dust boots on the street also. The boots burn up in about 10 min on track and dont do anything anyway. Just be sure to clean the pistons before pushing them back in the bore.

Bigbrake

Thanks for that, on the street these would eventually overtime corrode or seize without some regular maintenance or attention , the pistons obviously move in and out during use and contaminants (dirt, water, sand, salt, brake dust) will be ingested on a car that sees regular use on the street. Track- yes thats whole different ballpark, boots are useless but for true competition use the calipers will get more service / attention / upkeep than say a daily driver or even a weekend car

JHrinsin

Actually Wilwood recently updated their Aero6 calipers to include outer dust boots or seals. Those updated calipers were at first being directed to kits that are effected by TUV rules (so kits imported into European mostly). Not sure if they have been shipping C5/C6 kits as of yet with the updated Aero6 caliper - best to call their tech line and ask for any updates. Keep in mind that any caliper pistions fitted with an outer dust seal will get destroyed fairly quickly if used at the track with high Cof pads.

Kubs

Interesting. Mine definitely dont have dust boots and I just got them September of last year.

Elektro

Aero6-DS appears to be a separate product..