Brake rotors -69 Charger

[RobinAB]

Ordered new rotors over a year ago, and have finally gotten around to changing them.
But the new rotors are a bit smaller than the old ones, so now I'm not sure if they're the right ones.
The same rotors (7008R) at classicindustries are listed for 70-72 B-/E-body.
If they are different for -69, are they still available, or do people just use the (slightly) smaller ones?
If the bearings fit between them, haven't checked...

Edit: guess it could be that the ones already on the car are slightly bigger than the correct ones
The old ones are 11.25" while the new ones are 11".

 

[Dragon Slayer]

Sounds like they are wrong. Original 69 are about 11.25" and original 70-72 are 10.98" Plus bearing and other difference, I do not think they will work. G

 

[dieseldazzle]

69 probably has Kelsey hayes

 

[Dragon Slayer]

69 probably has Kelsey hayes

Opposite. 69 B Body is Bendix and 70 is KH.

 

[dieseldazzle]

Opposite. 69 B Body is Bendix and 70 is KH.

You sure about that?

 

[RobinAB]

I see 11,19" mentioned some places when i try to google some solid info on this.
But Year One have 11" rotors listed for 69 with 4-piston calipers.
The old rotors on my car are larger than, or going outside the pads, wich to me would suggest they are slightly bigger than the correct ones.
Guess I'll just have to see if the new ones I have will fit.

 

[dieseldazzle]

I see 11,19" mentioned some places when i try to google some solid info on this.
But Year One have 11" rotors listed for 69 with 4-piston calipers.
The old rotors on my car are larger than, or going outside the pads, wich to me would suggest they are slightly bigger than the correct ones.
Guess I'll just have to see if the new ones I have will fit.

Yes i bought the same rotors you are looking for to put on my 69 rt with factory 4 Piston brakes.

They weren't cheap but they were cheaper than nos

 

[Dragon Slayer]

You sure about that?

Yes I am I own both years with Disc brakes and both service manuals. Look in a 69 manual for the B body and also 70. They are different makers and size rotors and calipers. 69 Bendix 4 piston 11.19" Rotor; 70 KH single piston 10.98" Rotor. Now the A bodies used KH, but not familiar with all the A body details.

 

[RobinAB]

Can you guys tell what's needed to convert to -70 brakes in the front? Or if there's a better way to go?
The -70 rotors I have fits the spindle but looks like they have different offset from the ones already on the car. Haven't checked where the difference is, it might be that the "braking surface" is further out on 70 rotors and that 70 calipers is bolt on.
Looks like it's a PITA to find -69 rotors so I might as well change it all to something that's easier to deal with.
I find 70 calipers "everywhere" but I haven't found the brackets sold separately yet, or even sold with the calipers, only in conversion sets. If anyone knows where I can find these it would be much appreciated.

Sorry about my bad explaining ...

 

[Dragon Slayer]

I have the caliper brackets for 70 and they do come up on ebay. What I am not sure of is if they would mount on your 69 Spindle. You might have to find a 70 spindle set with the brackets. At that point you can get calipers for about $25, and you have the rotor already. So you are trying to use the 70 rotor on a 69 spindle with 69 Bendix 4 piston caliper? I will see what I can figure out, since a shop near me may have a 69 spindle set up I can check on.

 

[RobinAB]

I have the caliper brackets for 70 and they do come up on ebay. What I am not sure of is if they would mount on your 69 Spindle. You might have to find a 70 spindle set with the brackets. At that point you can get calipers for about $25, and you have the rotor already. So you are trying to use the 70 rotor on a 69 spindle with 69 Bendix 4 piston caliper? I will see what I can figure out, since a shop near me may have a 69 spindle set up I can check on.

Yeah, something like that

Considering most, if not all aftermarket spindles are advertised as suitable for 66-73 (IIRC) I would think the difference in offset is from where the "braking surface" (sorry, couldn't think of a better word) is in relation to the spindle. The wheel bearings are the same and the rotors fits my spindle but not my calipers.

If you have the opportunity to see if those brackets fits the 69 spindles it would be great
! ☺

 

[Dragon Slayer]

After market spindles fitting is one thing, but match OEM type stuff to it may be different. Early OEM had small front bearing, Later stuff (I think 73 up) used a bigger bearing. So I am not sure what bearing they use on the after market spindle and you may have to use their rotor because of front bearing. I will let you know what I find out. G

 

[RobinAB]

After market spindles fitting is one thing, but match OEM type stuff to it may be different. Early OEM had small front bearing, Later stuff (I think 73 up) used a bigger bearing. So I am not sure what bearing they use on the after market spindle and you may have to use their rotor because of front bearing. I will let you know what I find out. G

I know.. was just thinking about the offset difference... but I'll stop thinking about it and measure it ☺
Do you have brackets listed on Ebay or did I misunderstand? If you have, PM me a link.
Thanks.

 

[Dragon Slayer]

The spindles are different for mounting bracket so it won't work. There is a set listed on Ebay right now for $55 (not mine), but they are not going to work unless you get 70-72 spindles. Frankly, I think you would be better off going with one of the all inclusive conversion kits and selling your stuff. Or you need to get 70-72 spindles with the bracket. At that point your new rotors will work and just get the 70-72 pin style B body calipers. Basically, you have the 66-69 B, 70-72B and than the 73 and up stuff which folks use for conversions. They also go with the larger 11 3/4 rotors as long as you have 15" wheels. Frankly, doesn't year one have the correct 1 piece just more expensive? Maybe they will accept the others for credit.

 

[RobinAB]

Since I'm in norway the expensive 69 rotors becomes even more so before I have them here and returning the ones I have to Year One not an option. So I might as well spend a bit more bucks than new 69 rotors will cost and get something that's much more easy to maintain and even works better.
I don't want to sell the original parts as I think it's nice to have them if I or someone else further down the line wants to have everything as stock.

Don't know if i should get a conversion set or find some spindles with brackets. Have looked at some spindles listed at Ebay but I'm not confident they are the right ones.
Guess if I get the ones with the bigger inner bearing diameter I wouldn't be able to use 70 rotors?
Can I use the same calipers on which ever spindle I choose if it's 70 or newer?

 

[Dragon Slayer]

Missed that you where overseas. What calipers do you have now, the original Bendix 4 piston? If you go the 70-72 route, you need to get the spindle with small bearing and the key is the correct bracket to work with the pin style 70-72 calipers which are inexpensive. Hoses may have to change too, but that is minor. The 73 and up are a slider type caliper and a different caliper bracket. So getting the correct spindle and caliper bracket is the first part.

Correct, can not use small bearing rotor on large bearing spindle. They do make a sleeve for small bearing spindle to work with newer large bearing rotors. But that is not your issue as you have correct 70 rotors already.

 

[RobinAB]

Thanks.
Yes I have the original Bendix 4-piston now.
If I choose to use 73 (or was it 74..) to 76 A-body spindles rather than 70-72 B-body, getting new rotors isn't a major deal. Guess I can flip the ones I have anyways.
If I convert I feel the newer A-body spindles with matching brakes is the best solution, based on what I've read this far at least.
Just have to make sure I'm getting all the right parts the first time around

 

[RobinAB]

According to one article I've read the caliper brackets for both pin-type and slide-type has the same bolt pattern and can be used on either spindle.
What I haven't managed to find out so far is if the caliper would mount in the front of the spindle with 73-76 A-body. If so, would this present a problem in regards to the brake hose routing?
Also, if I use the newer brakes, would I need to change the master cylinder?