C5 Brakes on front

[MY6.2SS]

Hello,
Those that have installed the C5 front brakes using the blazer spindles, did it change the offset in your front wheels? What I mean by that is, did it push your wheel out board any? I have not yet installed mine but I am looking to buy new front wheels and wanted to make sure I get the backspacing correct.

Thanks for your help, David

 

[scoti]

If any difference, it will likely be related to the thickness of the rotor hat where it seats on the hub since both applications utilize the separate hat/hub set-up vs the older 1pc rotor/hub.

 

[Tony1968]

It's pretty easy to measure needed backspace. Hanging strings with some weight on them and measure to hub mounting surface etc

 

[MY6.2SS]

It's pretty easy to measure needed backspace. Hanging strings with some weight on them and measure to hub mounting surface etc

That is how I usually do it, but like I said, I haven't installed it yet. Just checking to see if anyone else has completed the swap.

 

[Tony1968]

That is how I usually do it, but like I said, I haven't installed it yet. Just checking to see if anyone else has completed the swap.

I know there are guys here who have done it. Maybe try a search. The info has to be here somewhere
My car has C7 setup so I'm not sure about C5
You can probably check Kore or Bigbrakeupgrade.com for measurements also. Good luck

 

[scoti]

You also can't rely on anyone's measurements. You can use them to compare but don't rely on them. Always measure your specific combo. It's a PITA sometimes because if you don't have things assembled for measuring, it delays other things that are dependent on the info. But it minimizes your possible mistakes.

Despite the fact that these cars are similar, every combo of parts can be slightly different. Add in personal preferences on appearances & what works for one may not work for you. Minor changes can be a big detail. I read where guys say this size wheel & tire w/these brakes fit.... then see where they're running spacers to clear the brake calipers. That changes things & has to be considered.. Stuff to keep in mind.

As mentioned, if they're both hat style rotors on a hub bearing assembly, you can start w/the dimensions there (rotor hub thickness). I know they definitely push the wheels out vs stock brake assemblies but doubt there's much difference between each other unless it's a custom offset set-up (only this rotor on this hub w/a specific caliper).

It's also a peeve of mine when manufacturers advertise brake kits as "maintains stock track width" when they really add to it vs stock brakes as it can make a difference when selecting the best specific BS/offset for your application. If the hubs land @ the same dimension as the factory 1pc hub/rotor assembly & you slide rotors over the hubs..... the track width is increased.

 

[scoti]

Another thing..... Make sure the new possible wheel options are 'caliper friendly' w/your brake option.

Case in point.... I test fit 17" steel Corvette rallys over 4th GEN f-body calipers & rotors (12"). They'll clear the set-up. An aluminum 17" rally? Unlikely.

Why? Because the cast aluminum centers are reinforced (thicker) where the spokes are (areas around the windows in the wheel center). That thickness is the difference maker between the two.

People will suggest printing off a caliper template to help determine if things will work. I scratch my head @ that suggestion because it would seem one needs the wheel in order to validate the template. What you need to know are caliper clearance dimensions/offsets. I try to find 'brake clearance' dimensions when looking @ wheels. Some manufacturers will provide caliper clearance limits. Obviously some calipers are much bigger vs others so they'll list the clearance needs Not every wheel manufacturer provides the info though..... ESPECIALLY budget priced wheel options. That's where you have to research what works w/what.

 

[Built6spdMCSS]

You're talking thousanths of an inch.... if anything. Hub is the same. Just the Rotor.

Pic for reference of my C5Z06 setup on front, Wheels went on fine.

 

[MY6.2SS]

You're talking thousanths of an inch.... if anything. Hub is the same. Just the Rotor.

Pic for reference of my C5Z06 setup on front, Wheels went on fine.

View attachment 192646

Thanks for the info!!
What brake lines did you use for this swap?
Thanks, David

 

[Built6spdMCSS]

C5 on the Calipers to the Gbody line, had to add new Flare Nuts since my old ones would not come apart.