C5/6 conversion brackets for single piston spindles

*Disclaimer* I take absolutely no responsibility for your f*ck ups. Brakes are serious and if your fab work blows DON'T DO THIS. If you die, kill, hurt, maim, suffer loss of property or damage others property it's on you. To use these you must cut, drill and tap your factory or drop spindles. This is simply the measurements and a drawling for reference.

The measurements are metric, that's how GM builds. You can convert the measurements but you may lose accuracy. Here is a calculator if you chose to convert to SAE.
http://lachie.net/maths/length.html

Stock spindle bolt spacing = 180mm
C5/6 caliper bolt spacing = 128mm
The vertical separation between the hole centers = 33mm
The bracket material = 0.375 (3/8 inch)
Spindle side bolt holes = 11mm (shown as 10mm because sketchup isn't accurate enough.)
Caliper side bolt holes = 14mm
*note* Make sure to leave a minimum of 3/8" of material surrounding all of the bolt holes to retain strength.
Metric drill bits can be found online.



The actual shape/ dimensions of the bracket are up to you. This is a basic shape I came up with.

Click this link for more info on the swap
http://www.pro-touring.com/forum/showpost.php?p=474214&postcount=33

I'm working on a bolt-on C4 brake kit (or at least what parts are needed) & the adapter brackets. I still think a modified version of this is the answer.

I'm working on a bolt-on C4 brake kit (or at least what parts are needed) & the adapter brackets. I still think a modified version of this is the answer.

I waited on your e mail and forwarded it to my friend with the cnc plasma burning table,hopefully I'll hear from him tomorrow.

Sweet! If the measurements are off I only have myself to blame, since I measured it.

Eric, you need to update the link to where that info is about the swap. I looked but I didn't see where it is so I could relink it.

Fixed.

Nice.

I saw my buddy with the burning table today.The dimensions are in the computer .soon as they have some 3/8 plate on the table he'll have some cut out.PROBLEM,the small round spacers.Cutting them out is not the problem,finding them in the water table is though.Washers?

Washers.. possibly. Even a 1" wide piece of 3/8" flat stock w/ 2 holes drilled in it would do it. Problably be better, too. I was thinking of welding those round spacers to the main plate. Guess I could always weld that flat stock to it instead.

Sounds like a plan.

If you guys could come up w/ a 1" wide plate that's drilled to match the .5625" holes ..& maybe radiused edges.. that'd be neat.

does someone already make these? and if not, would people actually buy them? cause i has CNC machine...

I bought mine from a vendor on the web that is well known on the forums. Personally I am not very happy with the pieces and thought I would post the dimensions. If you want to make them go for it, just verify the measurements. Plenty of Pro Touring G bodies out there...

are they steel or aluminum? i assume steel if the are only 3/8 ths thick. how thick can they be before they interfere with something?

The ones I have are 3/8 steel. In combination with cut down S10/ G body rotors as hubs for the C5/6 rotors they will not need spacers. 3/8 just works.

can they be 1/2 or 3/4 thick? is there room for that? whats the going rate for the brackets?

Here is the bracket (attached) I used for the C5 swap. This included cutting off the stock ears and drilling/tapping the dust cover holes. It was cut out of 1/2" steel. I can't take credit for the design though, it was made by a fellow member on S10f.

To mount the rotor, I turned the stock hub/rotor into just a hub and installed longer studs.

Sorry I don't have any pictures right now of the guts but here's the finished product.

I should also mention that i'm using drop spindles which I think has more material around the dust cover holes

I know this is probably slightly off topic but....has anyone compared the Blazer DP calipers to the C5/6 calipers or even the C4 calipers?  The reason I ask is that I'd like to get some drop spindles for my Blazer but don't feel like shelling out $325 for the 2102 spindles if I can pick some used "normal" drop spindles cheap and then adapt my stock DP calipers to them I figured I could save some $$.

Later, Doug

Does anyone have a picture of the adapter brackets bolted to a 2100 Belltech spindle (or even stock spindle I guess) without the rotor? I'd like to understand the design better. KORE3 doesn't make a bracket for first gen spindles, but he does make one for the 98+ blazer setup. Unfortunately I'd be looking at $600 to convert to that style spindle/hub, where I already have spindles and rotors to turn down to hubs.