So I'm messing with this 2010 Camaro independent rear end trying to figure out if I can stuff it under a TR8. Everything is working out swell. Go to bolt on a spare set of Wilwood 5.25" lug mount calipers and they aren't even close. Measuring calipers show a caliper mount of 4.7" or there abouts. What the hell is this? Can't find anything. Heard of GM metric mount calipers, but I thought that was 5.something something. I am completely out of my known universe. Somebody please shine a light on this for me. Where do I go to find calipers now? Can't simply bolt on the Brembos that came off of it because they use a 14.XX by 1.10 inch rotor. Thats just way too large for a 2400 pound car. Looked like the wilwoods would have been perfect with a 12.19 solid rotor. I can live with that. Somebody please tell me there is an aluminum caliper that will bolt on to this with a low profile, and if it has a built in e-brake, I will be forever indebted to you. Because the caliper mounts are so far outboard to begin with, I don't think caliper brackets are an option unless I do radial mounts. Might be easier to just machine up new carriers from billet.
So what you want is a caliper that fits a solid rotor, with an integrated handbrake, and mounts with a 5.25" bolt pattern?
Threads in the caliper or threads in the knuckle? I think I might have an answer for you when I get back to my parts pile.
I can get that from Wilwood. Thats not the issue. I need to know what this 4.7" mount is. Don't think I can make a bracket to go from 4.7" to 5.25" Chevy or even down to 3.5" Ford mounts without spacing it outboard even more. There just isn't enough room. I'm thinking this 120mm is a European mostly Brembo concoction. Found listings for some flimsy British aluminum calipers that mount to 120mm, and found lots of Mitsubishi Evo references using CTSV Brembos. Problem is CTSV calipers are essentially or even exactly the same as Camaro. Can't use 14.4" rotors.
So, 120mm/4.7? Thread in to the caliper or the bracket?
Must stop watching racing footage on YouTube and get to the garage...
Can we have a picture of the mounts you're working with? I wonder if you could build an adapter that mounts on the back side of the stock mounts and doesn't move the caliper outwards.
Just google Camaro IRS and you will get lots of photos. Can't go inboard because the hats would need to be so deep that they would hit the carrier. I have a 1.96" offset hat here and it won't fit without hitting the carrier. Can only go outboard and use an even shallower hat. A buddy of mine has the hubs and is drilling in the new 5X4.5" bolt pattern. Looks like I should be able to make a bracket that spans the 120mm and then mount Wilwood 3.5" calipers. This will however push the calipers out towards the wheels. As long as I can still mount the Enkei RPF1s I want to run and not foul the wheels on the calipers, all should be a good. Need to get the hubs back with the new bolt pattern and then mount up a wheel to see just how much room I have in there. Eyeball test with just the carriers looks like I should have the room I need. This morning I held the carrier inside a 16" RPF1 and it looks like it will just clear or just foul the inside of the rims. Going to have to run 17s whether I want to or not for clearance around the carrier, so its looking like 17X9 or 17X10s on the rear and 17X8s on the front.
