stu’s68furyiiirat
Active Member
Will this work on my 1968 Plymouth fury III someone told me that this will bolt up to my car
Disc brake one more time
- Thread starter stu’s68furyiiirat
- Start date
No, the C body spindles are taller.
No, too small.
stu’s68furyiiirat
Active Member
A b body guy say it would work I’ll show him this post to to prove my point
Just show him these pictures.
It might actually bolt together, but the geometry won't be right.
fury fan
Senior Member
No, as others have said, it won't fit.
B/E-body LBJs have a smaller bolt spacing than C-bodies, so the spindles won't bolt to your LBJ/steering arms.
The BJ pin-taper sizing is also smaller on those cars.
There were guys perhaps 10 years ago discussing the use of C-body discs on the smaller cars, but it required some machining work to get the parts to assemble.
Then there's the whole discussion of spindle height, alignment specs, and steering geometry.
But you wouldn't get far enough to worry about that with that kit.
I really wonder how well that fits all the years/carlines shown, as some 62-65 A-bodies can have 9" drum brakes, and I've read that those parts are really small, smaller than what is used on the small 10" drums. And we use 11" drums.
IMO your best bet right now, due to our C-body calipers being NLA, is the kit from ECI Hotrod Brakes. (but it's $925)
It has only an 11" rotor, but uses larger-piston GM D-52 calipers, and claims 15-25% more braking than later B-body brakes (which is in the kit you showed).
And it uses no bearing spacers or other claptrap.
Chrysler Disc Brake Kits
B/E-body LBJs have a smaller bolt spacing than C-bodies, so the spindles won't bolt to your LBJ/steering arms.
The BJ pin-taper sizing is also smaller on those cars.
There were guys perhaps 10 years ago discussing the use of C-body discs on the smaller cars, but it required some machining work to get the parts to assemble.
Then there's the whole discussion of spindle height, alignment specs, and steering geometry.
But you wouldn't get far enough to worry about that with that kit.
I really wonder how well that fits all the years/carlines shown, as some 62-65 A-bodies can have 9" drum brakes, and I've read that those parts are really small, smaller than what is used on the small 10" drums. And we use 11" drums.
IMO your best bet right now, due to our C-body calipers being NLA, is the kit from ECI Hotrod Brakes. (but it's $925)
It has only an 11" rotor, but uses larger-piston GM D-52 calipers, and claims 15-25% more braking than later B-body brakes (which is in the kit you showed).
And it uses no bearing spacers or other claptrap.
Chrysler Disc Brake Kits
I've got that ECI brake kit sitting in my room right now, the biggest reasons for me picking this kit were the fact that you can retain the original spindle, and that there are EBC bluestuffs available in the D-52 pattern; I fully intend to take my barge out to the occasional "arrive and drive" style of track day. D-52 pads are everywhere though, so lots of options to choose from. It uses rotors from a 1980 firebird, rockauto sells them. They seem to sell centric/fvp 12162025 rotors which by the pics, appear to have two bolt patterns so these have a chance of fitting over our wheel studs. If these are confirmed to fit, then it will save having to machine rotors to fit our PCD.
Worth noting however that the instructions say to have the calipers towards the rear of the vehicle, but this may result in having to fab up new brake lines as the factory lines go to the front, and there is no rubber line I know of that can reach from the front all the way across to the caliper without consulting a local hydraulic shop. The mounting brackets are symmetrical however, so you can mount them on backwards so the left caliper sits on the right corner, and vice versa which lets you mount the calipers towards the front. Might raise eyebrows, but it saves having to refab the steel brake lines.
Worth noting however that the instructions say to have the calipers towards the rear of the vehicle, but this may result in having to fab up new brake lines as the factory lines go to the front, and there is no rubber line I know of that can reach from the front all the way across to the caliper without consulting a local hydraulic shop. The mounting brackets are symmetrical however, so you can mount them on backwards so the left caliper sits on the right corner, and vice versa which lets you mount the calipers towards the front. Might raise eyebrows, but it saves having to refab the steel brake lines.
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rd92west
plan C
AAJ Brakes
is a good alternative
For $300 you get a caliper mounting bracket that bolts to the original spindle and bracket mounting hardware. Plus a list of what caliper, rotor, and hose you need to get.(All readily available)
Brackets for 14 and 15 inch wheels are available
is a good alternative
For $300 you get a caliper mounting bracket that bolts to the original spindle and bracket mounting hardware. Plus a list of what caliper, rotor, and hose you need to get.(All readily available)
Brackets for 14 and 15 inch wheels are available
fury fan
Senior Member
Presumably hte AAJ uses the stock hub/bearings/seal, after you remove the drum from it?
Do you know if it will fit behind a 14" wheel?
If so, that $300 is a great option.
fury fan
Senior Member
That centric/fvp 12162025 rotor isn't a direct-fit, at least on paper.
The 11.16" dia give a bit of a chance that it will fit inside a 14" rim, but the 2.201" overall height puts the caliper outboard toward the rim. (15" wheel should be no problem?)
It doesn't specify what the 2nd bolt pattern is, it is visually larger bolts than the .457" and a smaller bolt circle - so perhaps it fits our .5 on 4.5".
The center hole needs enlarged a bit to our 2.81", but that's do-able with a die grinder and a carbide burr if you have the patience.
The .98 x 11.16" rotor size is in B-body territory, and not the later '75-newer one that is 11.75", but the prior/smaller-dia one.
Is it better than 11x2.75" drums we have? Probably, esp with the better-friction D52 pads that are available.
But with heavy braking, I'd be wondering how easily these rotors will warp due to their reduced mass compared to a C-body rotor.
This is for 79-81 Firebird, so only 3 years of usage and only that car (no Camaro, either). Presumably it was for the WS6 handling package.
That's a cult-classic car, but if you go this route might want to buy 3-4 sets of rotors and put them on the shelf just in case these go NLA!
Be aware that hte D52 caliper comes in 2 sizes, for the thicker and thinner GM rotors. One must make sure to get the right one. Sometimes the GM full-size cars use the thinner rotor, one must dig into the measurement page (like the one posted below) to make sure.
This rotor is for the rear of the car, so one cannot simply choose the front caliper and assume it will fit the thickness of the rear rotor. It might match, but must verify.
I will be evaluating this rotor a bit further for sure. It might be what I've been lookign for.
The 11.16" dia give a bit of a chance that it will fit inside a 14" rim, but the 2.201" overall height puts the caliper outboard toward the rim. (15" wheel should be no problem?)
It doesn't specify what the 2nd bolt pattern is, it is visually larger bolts than the .457" and a smaller bolt circle - so perhaps it fits our .5 on 4.5".
The center hole needs enlarged a bit to our 2.81", but that's do-able with a die grinder and a carbide burr if you have the patience.
The .98 x 11.16" rotor size is in B-body territory, and not the later '75-newer one that is 11.75", but the prior/smaller-dia one.
Is it better than 11x2.75" drums we have? Probably, esp with the better-friction D52 pads that are available.
But with heavy braking, I'd be wondering how easily these rotors will warp due to their reduced mass compared to a C-body rotor.
This is for 79-81 Firebird, so only 3 years of usage and only that car (no Camaro, either). Presumably it was for the WS6 handling package.
That's a cult-classic car, but if you go this route might want to buy 3-4 sets of rotors and put them on the shelf just in case these go NLA!
Be aware that hte D52 caliper comes in 2 sizes, for the thicker and thinner GM rotors. One must make sure to get the right one. Sometimes the GM full-size cars use the thinner rotor, one must dig into the measurement page (like the one posted below) to make sure.
This rotor is for the rear of the car, so one cannot simply choose the front caliper and assume it will fit the thickness of the rear rotor. It might match, but must verify.
I will be evaluating this rotor a bit further for sure. It might be what I've been lookign for.
When I was hunting for rotors on Rockauto I did see that and note the diameter of the hole was almost the same size as the Durago BR5560 rotor that I got and ended up having machined, resulting in the total cost blowing out to even more than if I had just bought the Centric rotors straight from Rockauto and footing the extra cost of shipping from a different warehouse from the rest of my parts.
The BR5560 has a center hole diameter of 71.7mm, while the 12162025 from what I can find is 70.8mm. With the ECI hub, the BR5560 fit snugly on it, my wishful thinking is that one could still get away with a 70.8mm diameter but I'll need to check again if there's any wiggle room on the hub for it. Update: The 71.7mm fits VERY snug, probably not even 0.5mm clearance all around. Highly likely that the center hole would need to be reamed out ever so slightly. But hopefully someone else with the ECI kit can confirm for sure.
The reason I suspect the dual bolt pattern of the 12162025 would work was because when I had my rotors drilled, the holes ended up looking exactly like what was seen in the Rockauto pics.
which sounds like it increases the applied pressure to match that of the drums at the cost of increased pedal travel. And to be honest I don't actually mind extra travel; I feel like the stock brakes are incredibly touchy as they are.
The BR5560 has a center hole diameter of 71.7mm, while the 12162025 from what I can find is 70.8mm. With the ECI hub, the BR5560 fit snugly on it, my wishful thinking is that one could still get away with a 70.8mm diameter but I'll need to check again if there's any wiggle room on the hub for it. Update: The 71.7mm fits VERY snug, probably not even 0.5mm clearance all around. Highly likely that the center hole would need to be reamed out ever so slightly. But hopefully someone else with the ECI kit can confirm for sure.
The reason I suspect the dual bolt pattern of the 12162025 would work was because when I had my rotors drilled, the holes ended up looking exactly like what was seen in the Rockauto pics.
Oh boy, wish I knew that. However, the ECI kit does specify what parts are used and even includes part numbers for the bearings too, all this available from Rockauto as well:
The rotor size may be smaller than the stock drum, but the ECI kit specifies a master cylinder with a 1.031 inch bore, versus the stock 1 inch bore,
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Just Carbs
Well-Known Member
Bigger master cylinder bore decreases pressure at the wheel and decreases travel at the pedal.
oops thanks for correcting me. less travel but with less pressure probably means it's much easier to modulate the pedal. Going from an 89 Toyota Cressida to a 18 Camry I thought the brakes on the Camry were touchy, then I got in the Plymouth and whoa boy lol. I thought it was rather interesting that the pedal was very close to the floor (~1 to 1/2 inch?) at full travel too.
rd92west
plan C
AAJ Roger is a 1 man show (unless you count his wife)
He can supply brackets for 14 and 15 inch wheels.
Recently I got brackets for 62 saratoga. This bracket is for 15 inch wheels. I could have gone with his brackets for 14 inch wheels but liked the idea of bigger diameter rotors for this car.
fury fan
Senior Member
Ah, I was getting the ECI and AAJ kits mixed up. Forgot hte ECI supplies the hub, so who knows what they have that rotor/wheel pilot machined to. I would hope it's the stock Mopar, though, to preserve hub piloting (although that's not absolutely critical).
To clarify - I was merely noting the stock drum size as to what our cars use and vs the smaller car drums.
The dia of the rotor and the ID of the drum cannot be directly compared toward brake performance, the mechanics of operation of drum vs discs is totally different.
I think the hub is just machined to fit the bog standard firebird rotors.
Right, makes sense
rd92west
plan C
The cut edges are dressed. This bracket is 3/8 thick.
This picture is included with the bracket.
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stu’s68furyiiirat
Active Member
Do you all have a link
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