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Author Topic: Rear disc brake conversion  (Read 2405 times)
rags31
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« on: April 29, 2011, 04:24:09 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
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flyingskibiker
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« Reply #1 on: April 30, 2011, 12:50:06 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...
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rags31
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« Reply #2 on: April 30, 2011, 08:25:45 AM »

thanks. . .
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joesauer
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« Reply #3 on: May 01, 2011, 01:44:11 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. 
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rags31
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« Reply #4 on: May 01, 2011, 08:57:09 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. 
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rags31
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« Reply #5 on: May 01, 2011, 09:00:09 PM »

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

rags31
'68SS
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mopar346
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« Reply #6 on: July 19, 2011, 08:05:36 PM »

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.
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tom
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« Reply #7 on: July 20, 2011, 07:26:24 AM »

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.
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69 X11 Z21 L14 glide
looking for a 69 export model (KPH) speedo
ChevyThunder
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race935
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« Reply #8 on: July 28, 2011, 03:48:47 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.



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1969 X44 COPO
1969 X33 RS Z/28
mopar346
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« Reply #9 on: July 28, 2011, 06:54:56 PM »

And there you have it, thanks Thunder.
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