BBU.COM

It is possible. I had a customer ask me to do a bracket for this and it will work, with one small mod. The calipers entrance and exit points gets very close to the rotor`s O.D. With this bracket. The JL9 base brake calipers will fit onto a Z51 rotor which is 1 inch larger diameter at 13.6 inch. The edges of the caliper just barely touch the rotor as it spins, so just a bit of dremel work for this mod. Everything else is std....std hub, bolt on application. This also goes for the ats caddy caliper on a z51 rotor, again std hub. I did have a small run of these brackets cut.

QwkTrip

iTrader: (22)

What bolt pattern are those brakes?

BBU.COM

5 x 4.75

UltRoadWarrior9

That's nice to know. The price for the Z51 rotors are comparable to the JL9 rotors on Rockauto. Also, I see they have drilled and slotted JL9 rotors available now too. They weren't available when I did my BBU conversion.


Thanks for the update Scott!

EDIT: Anything like this possible for the rear?

BBU.COM

Yes on your EDIT...the rears can be upgraded too, the JL9 backing plates need a mod but you can go to the Z06 rears, 14.4 rear rotor with a 4 piston caliper.

UltRoadWarrior9

Scott, you mentioned the front and rear brackets needed a mod. Is there any way we can purchase them from you ready to bolt on?

BBU.COM

The front mod is only making sure the caliper does not rub on the OD of the rotor. The only mod you would need on the rear is if you ran the parking brake...the backing plate would need some holes drilled and you can open the center portion if you wanted to make access to the flange bolts easy. (this would allow you to put on the backing plates with the adapter brackets all as one part. If you did not open the center of the backing plate you would need to assemble and disassemble in pieces. The rear brakes (C7 JL9 or 6th Gen Camaro SS) would still use the 5th gen Camaro SS backing plates or the 5th gen Camaro V6 rear backing plates. I do offer the whole rear assemblies ready to bolt on, mods done with low mile take off backing plates or all new assemblies.

UltRoadWarrior9

Thanks for responding so quickly. I'll be in contact. Thank you sir!

Would this be a good place to post my updates or should I continue on my original thread?

BBU.COM

I`d post at both , your planning to move the fronts up to the 13.6 rotors? I`d leave the rears right where they are at 13.3 inch.

UltRoadWarrior9

Yes, the fronts are spec'd @13.6" and the rears @13.4", .1" larger in the rear... Going for a drilled slotted uniform look and performance on front and rear.

BBU.COM

typo sorry 13.4 (339mm) the JL9 and the Z51 use the same size rotor, the Z51 used a slotted rotor where the JL9 was solid, but besides that both are one in the same.

UltRoadWarrior9

Scott, do you have any brackets left for this upgrade to the front? Can you PM me the cost

UltRoadWarrior9

An aside question: do Z51 calipers have the same bolt pattern as JL9?

BBU.COM

The bolt spread is the same but location of the holes are different due to the different rotor diameters that they are married too. (distance from center point) So the Z51 caliper mounting points are longer for the larger diameter rotor and thus the JL9`s are shorter to fit the smaller rotor. Now in this case where we are installing a shorter legged caliper onto a larger rotor the spindle bracket (in our case) must move the static mounting points out so that the caliper with short legs can fit over the larger rotor.

UltRoadWarrior9

So after getting your adapters for the Z51 rotors on the front, I would be able to fit a JL9 caliper OR a Z51 caliper?

BBU.COM

negative, the hybrid adapters move the caliper mounts out .50 of an inch (to account for a 1.00 inch larger rotor) so with the hybrid brackets you use a JL9 caliper on a Z51 rotor, IF you put a Z51 caliper on the hybrid it would be .5 of an inch out from its natural position, you would then need a 14.6 inch rotor for that Z51 caliper. The Z06 rotor is 14.6 inch but I`ve not tested it, but there`s a good chance that would work.

A Z51 caliper and rotor would use the standard bracket similar to the one you have now BUT the caliper needs milling normally to clear the bracket.

this link has photos of that caliper clearing