CRG Discussion Forum

Camaro Research Group Discussion => Mild Modifications => Topic started by: rags31 on April 29, 2011, 09:24:09 PM

Title: Rear disc brake conversion
Post by: rags31 on April 29, 2011, 09:24:09 PM

Hello,
I'm new to the forum. I recently acquired a '68 SS with front disc brakes and was considering upgrading the rear drums to disc. I was hoping to get feedback from any one thats made the upgrade and if it's an improvment to what degree, Also, what kit does the best job as I've seen 3-4 on the market. I'm also considering changing out the "14x6 rims to "15x7 - are there any problems going with the 15's front & rear? What tire sizes would you recommend 225 or 235? Is therd enough clearance in front for these?

Thanks for your feedback

rags
'68 SS

Title: Re: Rear disc brake conversion
Post by: flyingskibiker on April 30, 2011, 05:50:06 AM

I run 15X8s on my '68.  I have 295s in the back and 265s in the front.  The fronts rub a bit.  But I think with another 1/2" of back spacing, it wouldn't.  So, 225 or 235 should be fine.

As far as the brakes, I'm sure some people on here can help you out.  I can't.  But I'd like to suggest Team Camaro for help with most modifications.  There are a lot more people changing out parts on that site.  Just a suggestion if you don't get some quick answers here...

Title: Re: Rear disc brake conversion
Post by: rags31 on April 30, 2011, 01:25:45 PM

thanks. . .

Title: Re: Rear disc brake conversion
Post by: joesauer on May 01, 2011, 06:44:11 PM

Are your front discs aftermarket?  If so, it's a good idea to use the same brand front & rear.  Most conversions require a min. 15" rim w/min. backspacing requirements specified by the manufacturer.  Some would argue its a better investment to increase the size of your front disc's vs install disc's on the rear. 

Title: Re: Rear disc brake conversion
Post by: rags31 on May 02, 2011, 01:57:09 AM

Quote from: joesauer on May 01, 2011, 06:44:11 PM

Are your front discs aftermarket?  If so, it's a good idea to use the same brand front & rear.  Most conversions require a min. 15" rim w/min. backspacing requirements specified by the manufacturer.  Some would argue its a better investment to increase the size of your front disc's vs install disc's on the rear. 

Title: Re: Rear disc brake conversion
Post by: rags31 on May 02, 2011, 02:00:09 AM

front are stock power disc  - I'm going to 15X8 wheels - it appears most aftermarket rear disc kits require "15 wheels.

rags31
'68SS

Title: Re: Rear disc brake conversion
Post by: mopar346 on July 20, 2011, 01:05:36 AM

I believe you can use GM rear disc from a 79-81 Camaro/Firebird with little modification. Maybe someone can clarify.


Just noticed my thread on the subject at the bottom of the page, it appears to be a direct swap for a 69 according to some. Might be worth a read.

Title: Re: Rear disc brake conversion
Post by: tom on July 20, 2011, 12:26:24 PM

Lots of info here: http://www.pozziracing.com/brakes.htm#Converting_Drums_to_Discs
15x7 was standard z28 wheel, it fits. Tire size will depend to some degree on your backspacing, and any other mods, like dropped spindles, short springs, etc.

Title: Re: Rear disc brake conversion
Post by: ChevyThunder on July 28, 2011, 08:48:47 AM

Quote from: mopar346 on July 20, 2011, 01:05:36 AM

I believe you can use GM rear disc from a 79-81 Camaro/Firebird with little modification. Maybe someone can clarify.


Just noticed my thread on the subject at the bottom of the page, it appears to be a direct swap for a 69 according to some. Might be worth a read.

You are correct. I had them on one of my 69 Camaros and they worked great.

(http://img.photobucket.com/albums/v600/ChevyThunder/Hugger%20Orange%20X33/DSC00607.jpg)
(http://img.photobucket.com/albums/v600/ChevyThunder/Hugger%20Orange%20X33/DSC00608.jpg)
(http://img.photobucket.com/albums/v600/ChevyThunder/Hugger%20Orange%20X33/DSC00610.jpg)

Title: Re: Rear disc brake conversion
Post by: mopar346 on July 28, 2011, 11:54:56 PM

And there you have it, thanks Thunder.