Ok after about a year delay i am finally able to start buying the parts to finish up my 12" CBB conversion. here is what i have:
B-body tall spindles
81 malibu rotor/hub with a 2" JOE
stock chevelle control arms

here is what i plan to get:
12" C3 rotors
B/G body upper ball joints
B body lower ball joints
Offset upper shafts
JD7 Suburban calipers
78 camaro hoses
PFCM pads

Now after a year what I can't remember a few things. One is which C3 rotors work with a hub with a 2" JOE the fronts or rears? I know that RJ uses the fronts but made a spacer to get the rotor aligned correctly. I thought that BC had used maybe a rear rotor and it fit without problems?

Second is who carries the lower ball joints already turned down? If nobody has them I will just have to go bug BillK and see if he can turn some for me.

Third is the application listed the correct one for the brake hoses? I will probably go with the stainless ones from Right Stuff for about $50 a pair.

And finally I recall Joe mentioning to use a 617 pad instead of the 52, is this also valid for the JD7 calipers?

thanks all!!!

Originally posted by FIG:
And finally I recall Joe mentioning to use a 617 pad instead of the 52, is this also valid for the JD7 calipers?

thanks all!!! All good questions.

I guess you could call it me just being anal, but the reason I would go with the larger brake pads is due to the lining pressure drop with the more surface area the police spec pads allow. Just a simple force = pressure / area

The only reason I would do it was because of my design background when I used to work for a hydroelectric plant and had to redesign there band brake that stopped some huge turbines.

I had to worry about not exceeding the manufacturer's brake lining pressure or else cracks and over heating would occur...not good! The HUGE calipers from the suburban that is used for this swap allow for increased pressure onto the rotor when compared to stock iron moraine calipers.

Did RJ make a spacer to use the opposite rotors that Bill used?? Can't remember if they were front or rears :confused:

I thought his spacer was only to run the C5 'vette wheels?

If I remember correctly Bill used the 1LE 12" rotors that have a 1.75" Joe and RJ used a second gen. F-body rotor as a hub with a 2.0" Joe. I might have to do some research to find out.

I'm sure the resident experts will chime in here.

Thanks for letting me ramble!

Joe

Not a problem with any rambling Joe tongue.gif

So 617 is the right number to pick up smile.gif You weren't too sure of the number in the post I was reading through. But I agree that it simply makes sense to use the larger pad, if we are going to bigger brake rotors for more surface area why not have a pad that uses more of that area to spread the clamping force on.

And I do believe RJ made a .125" spacer to go behind the rotor to bring the rotor out the extra space and fully center it in the caliper.

And no I'm not having fun yet :rolleyes: That starts once i actually get the parts in hand!!! graemlins/hurray.gif

Originally posted by FIG:
Not a problem with any rambling Joe tongue.gif

So 617 is the right number to pick up smile.gif You weren't too sure of the number in the post I was reading through. I'll check tonight with my parts books (when I fly back to KC) and get the right one for you. I do believe the '94-'96 Impala's used them as well as the 9C1 police spec Caprices.

I'll report back tomorrow to let you know.

Joe

JJ,
Looks like the part number is "614A" for the larger pads.

Hope this helps you out! graemlins/beers.gif

Joe

Cool J.J.

You ae correct, I used the front C3 rotors. And Bill had rear C3 rotors. He had something that wasn't exactly correct with the spacing on the rear rotors, and so I thought I would be smart and use front rotors. Well that is how smart I am, I do need to run a .125" spacer behind the rotor to get the pads to line up. graemlins/clonk.gif

If I get a chance I will look for Bill's orginal post, or maybe he will chime in at some point.

Good luck with the setup!

R.J.

Sorry, i don't get out here too much, but maybe I can pull a few things from memory!!

On the rotors, what I ended up using was a later 70's Camaro or Friebird rotor to make my hubs and they only had like a 1 3/4" JOE. For that reason, I had to use the rear Corvette rotors or could not get the correct orientation of the calipers. If you use a hub like the ones mentioned and they have the 2" JOE, then you should be able to use the Corvette FRONT rotors and be lined up fine. Hope that helps on the rotors...

Another option I just learned about today is possibly using a late model Camaro rotor instead. I just looked at what I believe is a 2002 front cross-member from a Camaro one of the guys here at work bought. I am thinking of using that same setup under my 56 Chevy pickup project. I noticed that the Camaro now uses the 12" rotors that are 1 1/4" thick and slip onto a hub that is mounted to the spindle. It looks VERY similiar to what we are making here... I just wonder how close of a match the late-model hub and rotor assemblies would be to slipping onto our spindles?? If nothing else, the rotors looked like they might be adaptable.

Fig,
The ball joints can be pruchased from Hotchkis and/or Global West separately and are not priced too high, but then you would have no excuse to bug BillK!!

If you go with the JD7 calipers, one thing to remember it that they use metric banjo bolts! Also, the mounting boss where the brake hose attaches is a little recessed and the factory lines have a little bend in them where they connect. I'm not familiar with the 78 camaro hoses, but they may work. Another suggestion I would have is to simply use disk brake hoses for the stock Chevelle! The JD7 calipers brake hose mounting point is pretty much the same as the Chevelles, only about 1/2" closer to the frame! You will probably need to grind off the corners of the brake hose fittings on the caliper ends because of the 'hole' on the calipers, but it should work fine, just make sure you get the right banjo bolt!! I have a spare set of braided hoses from Earl's for a stock Chevelle I could sell you if you are interested. I'm going to try and remember to bring them to CB'04 with me...

The JD7 caliper uses the standard '52' series pads, so whatever upgardes Joe can come up with for pads that fit a stock caliper will also work for those calipers. I have not tried the pads Joe mentions, but hope to on my next project.

Hope that helps for now... gotta go pack for CB'04!!

Bill C.

Bill,

I have a 12" rotor off of a '94 Z28. It doesn't have a hugh offset, but it might work out well. I can get some measurements off of it for you and post. And have fun at CB! graemlins/thumbsup.gif

R.J.

Originally posted by airrj:
Bill,

I have a 12" rotor off of a '94 Z28. It doesn't have a hugh offset, but it might work out well. I can get some measurements off of it for you and post. And have fun at CB! graemlins/thumbsup.gif

R.J. Keep in mind the front F-body rotors Bill is talking about were used from '98-'02.

Nice pieces :D

Joe

Hmmmmm seems that the plot thickens.... Anyone have a 98-02 rotor laying around? What can i say.. i love that this is a living process in which new ideas come about and get used graemlins/beers.gif

Oh and BTW I checked with Hotchkis and they want $45 EACH graemlins/angry.gif can you say ouch?

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