11.75 pin type brake caliper bracket

Hola!

Well I'm actually working on my 71 Challenger. It has stock 71 E-body disk brakes up front. I know of a few late 70's C-bodies lying around and I'm going to try to pick up a set of 11.75 pin style brackets.

But the more I read, it sounds like I'll need more then just brackets. I'll need an adapter from Dr. Diff to run the C-body rotor on the E-body and some other nick-nacks.

Am I wrong? Am I crazy? (don't answer the last one).



Thanks

"C" body caliper mount brackets DO NOT fit an "E" body spindle.
They are to big, and the bolt hole spacing is way to wide apart.
Doesn't work.
You need mounts from Cordobas, St, Regis, Newports, of the later 70's to bolt up.
Same thing with rotors, to be needed from those cars.
They are 1.000 inch thick, and "C" body rotors are 1.250 thick.
C's are to wide for E body spindles.

The later "B" body disc set-ups is what I run on my cars. And I think the slider type is the preferred type. And it seems that the Diplomat discs work, too.

We can still find disc set-ups on Diplomats and such in the pick-a-part yards for under $100 complete.

Diplomat disc brakes are almost basically what thev OP has on his car already.
10.8 inch rotors.
The difference is in the calipers.
E's have pin type calipers, Diplomats have slider type calipers.

Sounds like the op wants to upgrade to the 11 3/4 inch rotors.
Then he needs Cordoba type of brake parts.

I had slider 11.75" on my Barracuda before I tore it down [i'll sell those parts soon] along with late B-body spindles. All worked fine.

I reproduce the late '70s B-body 11.75" caliper brackets AND early/late style slider calipers. These bolt to A/B/E/F/M/J/R body disc knuckles.

I also make a brake kit which mates first generation Viper calipers and 11.75" C-BODY rotors to '73-'75 A-body drum knuckles as well as all B/E body drum knuckles.

Oh I'd love to get your disk brake viper setup. It is just out of my price range. And I thought I saw your 11.75" kit was for the slide style caliper?

But if I wanted to go to a slider style, I'd have to swap over the spindle and get new calipers, etc... I was hoping just to get the adapter bracket and new rotors.

Ok, so I need to find some late 70's B-body aka Cordoba 11.75" Pin style adapters. That should work with the E-body spindle and bolt spacing on each? And from what I've read, the pin style is the better style between the two.

You can simply bolt 11.75" slider caliper brackets and calipers to your existing disc knuckles.

New black zinc plated 11.75" caliper brackets with hardware $90 pair

New, black powder-coated slider calipers with hardware and pads $120 pair

I don't believe pin type calipers offer any advantage over the slider type. In fact, most pin calipers result in fitment problems when performing disc brake conversions.

My '73 Dart had slider calipers on it, but they would rattle and clunk driving on cobble stone road, just like something heavy is about to fall off your car.
Had to rebend and even reinforce the tabs that maintain the calipers a few times, but they still got enough play over time to be audible. (We have a lot of cobble stone roads here).

When time came to replace the 10.9" setup, I just used what I had laying around;
- Late b-body brackets
- '73 Chrysler calipers
- '73 Rotors (11.75" & 1.25" thick)

Just needed 2 shims/washers to space the bracket out so the caliper aligned with the rotor nicely.
And an adapter collar on the spindle to be able to mount '73 outer bearing on the Dart's spindle.

Slider calipers rattle when the brake pad tabs are not bent tight against the caliper, the caliper/bracket "ways" are worn or flimsy hold-down clips are used.

http://www.slantsix.org/forum/viewtopic.php?t=58938&sid=1a849d87949c62c4b1964c1162a01147

Isn't it more then that? Wouldn't it be, adapters, pads, calipers, lines and rotors?

adapters and rotors is it.

Assuming you buy the adapters that match your existing calipers.

Try not to over think it.

But that's what I'm saying. The car currently has 71 E-body disk brakes, which are pin style calipers. He's saying to swap to the 11.75" slide brackets. Which would mean new calipers, rotors, adapters and lines I believe. If I'm wrong, then let me know.

But for the same price of all that, I could just upgrade to the viper caliper adapter setup he has.... which is tempting. I know I can get some A-body drum spindles or probably some E-body ones.

Just get the pin type adapters then.

Not enough difference, imo, between the two styles to warrant the cost of converting.

Other than bling, what does the viper caliper bring to the show that isn't being addressed by the stock calipers?

Nothing.

That's what I'm saying. If I go and get slide adapters, I need everything that goes with them. If I am getting everything anyways, for a few extra dollars I can get the viper setup.

But if I get the 11.75" Cordoba pin style adapter brackets, all I should need is the adapter and rotor I believe.

Correct

Question: Are the pin-type calipers from the OP's 71 properly dimensioned to mount onto the brackets for the 11.75" rotors?

I have a '72 pin type disc setup on my Challenger, along with the later large-bearing-spindle (73-up) sitting aside now (thank you 71hemigtx), so, I believe the OP and myself are in the same situation. I want the 11.75 discs but would prefer the pin-type calipers instead of the slider-type calipers. Can the 71/72 pin type calipers be used with the larger 11.75 discs?... with the proper bracket?

I've considered the Viper front setup and recently tried various rims on that setup (thanks again to Sublime 70 Charger!)... too tight for my rims and will NOT fit with factory steel Mopar ralley rims!

From what SuperCuda is saying above, if we get the 11.75" adapters from a later model B-body. The caliper remains the same. All we have to do is get the rotor and the actual adapter. From what I can see, it is any 76-79-ish B-body like a Cordoba or Magnum.

Ah, hold on a second.

I don't think there is a difference between the the early and later pin calipers, but I am not an E or a B body guy and I don't know for a fact.

MoPar Action's swap guide doesn't seem to say one way or the other.

One other mandatory part on this swap, 15" rims.

I don't know what the Viper stuff costs, but even IF the change was made from pin to slider, the additional parts wouldn't cost that much money. Reman calipers are $25 each, pads would run about $20, and hoses are $5 apiece, so $80 more to go to the pin type.

Of course when I pull that stuff in a pick-a-part yard, it all comes with and usually costs $50 to $75 a side. And that includes the spindle and rotor. Sometimes, it is even fairly new reman stuff.

Question about disc pads (inside and outside) -- aren't the pin-type pads slightly larger in square surface area vs the slider type pads? IF yes, then there is an advantage, IMO, to having the pin-type calipers (or whichever is larger, speaking for both the inside pad and the outside pad).

Dunno, I do know that the pin type has more options in regards to friction material choices though thru Hawk. But Firm Feel does have some for the slider types too.

I have done this swap on both my 71 Road Runner and 72 Charger. All you need since you have discs already is the Dr Diff spacers, B-Body 11.75 pin adapters and rotors. As said above C-Body will not work. Your calipers, hoses and hardware are a direct swap. I used Wagner BD60475 rotors and Bendix CQ ceramic pads on both.

In 1973, the pin caliper's fluid port location changed.

Hose routing is funky when this caliper is mounted toward the front on muscle era Mopar A,B, and E bodies. When this caliper is mounted toward the rear, the brake hose banjo bolt hits the lower control arm before full lock!

'70-'72 pin calipers are fairly scarce and costly. These fit nicely when mounted toward the front, but hose routing suffers when installed toward the rear.

Due to clearance purposes, most pre '73 A-bodies equipped with sway bars and pre '70 B-bodies equipped with sway bars require rear mounted calipers.

Wow, thank you for that. I my calipers have been sitting for a decade. I hope they are still good. I can rebuild them I believe though.

Dr. Diff, if I wanted to upgrade to the 11.75 rotor on my 71 Challenger. It would appear I need your sleeve kit to make it work?

http://www.doctordiff.com/70-72-b-e-body-disc-brake-spindle-sleeves.html

Yes. The spindle sleeve/seal kit allows you to bolt '73 and newer rotors and wheel bearings to pre '73 knuckles.

Question -- Can the 72-older (72-71-70) pin type calipers be used on the 11.75 rotors... and must they, then simply, require the B-body caliper brackets for the 11.75 rotors? Also, will those 11.75 pin-type caliper brackets properly attach to the 72-older e-body disc brake spindles?

I believe the answers to above ar YEs, but, i just want to be re-confirmed.... then I'd need the DrDiff sleeve kit instead of swapping the spindles.

Yes, on all counts.

DR Diff/Cass -- T/Anks for the confirmation... saves some $$ to spend on other items.. such as your rear disc 10.75 setup! I'll contact you soon!

Now, I just need to locate the B-body 11.75 pin-type brakets (front end of car is apart now... timely to find them!!!).

I just picked a set of brackets up off a 1978 Dodge Monaco (the basic Monaco was on the B-body platform)

Everything checks out to being the correct ones, so once I get them cleaned up and order up the Dr. Diff stuff. I'll do an article on the upgrade.







Ryan

Before you have too much time invested in those caliper brackets, run a tap through the caliper pin threads and make sure they are good. In your pics they look a bit rusty. They can be nearly impossible to heli coil as there isn't a lot of meat there to hold a sufficient number of heli coil threads to do the job. Been there, done that...had them pulling out/unthreading on me when screwing in the pins even after trying to loc tite the heli coil in place...that's one advantage the sliders have over the pin type brackets...

mitch the brackets you were interested came off identical car even the color gerry

You're absolutely right, mine seem to have cleaned up nice, thanks to a thread chaser my friend let me use.







Ryan