disc brake conv opinions? - Ford Bronco Forum
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post #1 of 29 (permalink) Old 04-03-2017, 08:15 PM Thread Starter
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disc brake conv opinions?

So since the Bronc is off the frame and starting with, well, just a frame, i figure I might as well put discs all the way around. There's a lot of kits out there, and also i understand there are some that fit off other cars. I figure they should at least match the front, whatever size they are. If they are small, maybe i should make all 4 the same size, bigger? There's kits on LMC with plain rotors for 500 bucks, then there are slotted/drilled 14" rotors with the full kit for 1700 bucks on racing sites, so theres a lot of options. What have you tried, and how has it worked? opinions?
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post #2 of 29 (permalink) Old 04-04-2017, 01:09 AM
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The front rotor is 11.7 inches. You want the rear to rotor to be smaller than the front. so now you're thinking "hey, why not get bigger front rotors then i get the cool big rear brake kit!" Well no one makes a big brake kit for the Ford dana 44 front so get that out of your head.

Remember your wheels also have to be able to clear the rotor. I've got 14" rotors on my mustang and my 17" wheels barely clear them.

If you want big brakes and don't mind buying new wheels to fit over them your best bet would be to upgrade to 1 ton axles front and rear.

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post #3 of 29 (permalink) Old 04-04-2017, 07:16 AM
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Not true on the front brakes, though if you want big brakes up front your going to have to pay for it.
Flight industries fabricated knuckles and brakes - GoFastBroncos.com A lot of those are TTB knuckles but I have seen his work on some Solid axle ones as well
I agree on bigger axles being a good way to go about getting better brakes, and beefier stuff though too.

I have 2 broncos, both have the normal style rear disc brake kits on them and they both work very well. The two I kits I have both use montecarlo front calipers. LEB (lefteyeblind) makes some brackets that use bigger chevy truck calipers.
Should also think about upgrading the master and booster, or going to hydro boost setup at the same time. Most of the suckyness that is the 78/79 brakes comes from those items.


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post #4 of 29 (permalink) Old 04-04-2017, 08:08 AM
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I have SSBC brake kit on my bronco 9 rear end. There not bad, and priced around 650.00. There are two kits from wilwood on the summit site, but there back placing is a 1/8" off on the kits. This can be corrected with shims for the calipers alignment. There are around the same price, they do offer internal emergency brake and solid or slotted and cross drilled rotors. If I new this 6 years ago i would have gone that route instead of ssbc kit.
i also run a f-250 brake booster and a master cylinder from wild horses. In the end it's $$$ and cents and style.

Last edited by outlawbob; 04-21-2017 at 07:55 AM. Reason: spelling
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post #5 of 29 (permalink) Old 04-04-2017, 10:44 AM
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So I read through some of the Flight Industries threads and that mans work is impressive. The only price I could find that was mentioned anywhere was $4300 for the complete front kit. Now if I was a desert racer looking to keep my long travel TTB dana 44 I could see sending my money to a guy on Instagram to make that happen. Everyone else would go Dana 60 with hydroboost and still have money left over.

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post #6 of 29 (permalink) Old 04-04-2017, 12:57 PM
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As I read it, hydroboost is all that is needed on the stock system. I am going to do that first and then upgrade if necessary.

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post #7 of 29 (permalink) Old 04-04-2017, 01:31 PM
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Another rear option 2500-5B - TSM Mfg. Co., Inc.

I'm doing the opposite just for curiosity sake. I want rear discs regardless, so when I did my total brake overhaul, along with the new lines, calipers, etc, I bought the CCP MC (hydroboost MC that comes with the WH kit) along with a stock replacement new booster. I didn't have the Bronco budget funded for full hydroboost at the time.

So, I'm curious to see what it's like with a stock booster, but upgraded MC and rear discs (whenever I get around to installing the rear discs). Then regardless I'll do the hydroboost unit at some point.
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post #8 of 29 (permalink) Old 04-05-2017, 12:13 AM Thread Starter
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Good info. I'm not really wanting to go through the trouble of swapping axles out just to get huge rotors or anything, basically I just want something that works very well, not crappy. Hydroboost is a great upgrade idea, but as far as what rotors and size, apparently the typical plain conversion kits are enough to work very well on these trucks it sounds like. I'll check into a few of the mentioned kits. Thanks for ya'lls help!
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post #9 of 29 (permalink) Old 04-05-2017, 08:57 AM
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BC Broncos in Kerrville, TX makes a rear disk kit for the early Bronco 9 inch. It should fit the 78-79 as well. Uses Caddy disks and has an e-brake. I have it on my early Bronco crawler with hydroboost. Works great!
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post #10 of 29 (permalink) Old 04-06-2017, 12:28 AM Thread Starter
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great, that's not too far away from us, i'll check it out
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post #11 of 29 (permalink) Old 04-06-2017, 12:54 AM
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Brake size is more relative to heat dissipation than power, a caliper with more pistons and larger pads adds frictional clamping force. The front does 75% of your braking for best handling, a proportion valve controls this bias regardless of brake size or force. Unfortunately I have yet to see a brake upgrade for the front of a solid 44 axle as of yet so upgrading what you got is the best option. I went big on rotors, pads, shoes and hardware to maximize what I could squeeze from the front as those are the brakes that stop you and take most the heat.
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post #12 of 29 (permalink) Old 04-17-2017, 09:46 PM
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I've not done this myself, but I've researched it quite a bit. The late model Explorer/Mountaineer 31-spline 8.8 rear came with factory disc brakes. The parking brake is an internal drum brake assembly. Apparently, these will bolt directly to a big Ford 9" housing directly after grinding a bracket or two from the late model setup. That's probably the route I would take over any GM or SSBC stuff.

'79 Ford Bronco: 408-ZF5-NP205 SEFI-EDIS8; 4" lift, Dana 44/Ford 9" w/4.10s, locked
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post #13 of 29 (permalink) Old 04-18-2017, 09:04 PM
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Hydroboost is going to get you the best brakes using stock size stuff.
Will be a better upgrade than rear disk (or anything else you do to the stock type/size brakes).

Want even better brakes, go 8 lug front (with stock bigger brakes) and D60 rear (converted to disk).
Probably cheaper overall than some $2000 big brake kit.
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post #14 of 29 (permalink) Old 04-18-2017, 10:19 PM
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Quote:
Originally Posted by Shaker666 View Post
I've not done this myself, but I've researched it quite a bit. The late model Explorer/Mountaineer 31-spline 8.8 rear came with factory disc brakes. The parking brake is an internal drum brake assembly. Apparently, these will bolt directly to a big Ford 9" housing directly after grinding a bracket or two from the late model setup. That's probably the route I would take over any GM or SSBC stuff.
I am trying to visualize what you are saying. So use the 8.8 backing plate and disc brake setup on the 9"?

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post #15 of 29 (permalink) Old 04-18-2017, 11:03 PM
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Quote:
Originally Posted by marshallnoise View Post
I am trying to visualize what you are saying. So use the 8.8 backing plate and disc brake setup on the 9"?

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Mustang and Fords wrote an article on the Explorer brake kit retrofit to the Ford 9". The only specialization you might need for a '78-79 Bronco is the axle flange might be the st andard big Ford.

Rear Disc Brakes Conversion - Mustang & Fords Magazine

'79 Ford Bronco: 408-ZF5-NP205 SEFI-EDIS8; 4" lift, Dana 44/Ford 9" w/4.10s, locked
'00 Mountaineer:5.0L-4R70W-3.73 gears, stock
'89 5.0L LX hatch: full 90mm Blowzilla blown Dart 304 w/Vic Jr heads + TMoss ported GT40 lower @ 8.4:1
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post #16 of 29 (permalink) Old 04-18-2017, 11:11 PM
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Mustang and Fords wrote an article on the Explorer brake kit retrofit to the Ford 9". The only specialization you might need for a '78-79 Bronco is the axle flange might be the st andard big Ford.

Rear Disc Brakes Conversion - Mustang & Fords Magazine
I see now. Yeah, that seems like a lot of work to still have to deal with drums in some fashion. But it is an option out there.

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post #17 of 29 (permalink) Old 04-19-2017, 12:48 AM
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Quote:
Originally Posted by marshallnoise View Post
I see now. Yeah, that seems like a lot of work to still have to deal with drums in some fashion. But it is an option out there.
The drum brakes are for the parking brake, which IMHO is a good design since it segregates the duty of the disc pads from the parking shoes. A failure in one would still allow for the utility of the other.

'79 Ford Bronco: 408-ZF5-NP205 SEFI-EDIS8; 4" lift, Dana 44/Ford 9" w/4.10s, locked
'00 Mountaineer:5.0L-4R70W-3.73 gears, stock
'89 5.0L LX hatch: full 90mm Blowzilla blown Dart 304 w/Vic Jr heads + TMoss ported GT40 lower @ 8.4:1
'66 Mustang GT: 289, T5Z, 3.89 gears and a Truetrac
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post #18 of 29 (permalink) Old 04-19-2017, 12:51 AM
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Originally Posted by Shaker666 View Post
The drum brakes are for the parking brake, which IMHO is a good design since it segregates the duty of the disc pads from the parking shoes. A failure in one would still allow for the utility of the other.
I agree with you. For ME, personally, the maintenance of having to do both would turn me off. I hate drums enough. Presumably you would do the parking brake shoes way less often.

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post #19 of 29 (permalink) Old 04-20-2017, 07:20 AM
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Originally Posted by marshallnoise View Post
I see now. Yeah, that seems like a lot of work to still have to deal with drums in some fashion. But it is an option out there.
Exactly, main reason I went Mk VII rear disk on my classic bronco.
Those brakes might be a bit light for the rear of a fullsize though.

I didn't want to have to do that much work, just to have
mud still stuck in and trashing "some" drum brake parts.

Think if I was going to do a 9 on a fullsize today, I'd find a caliper
from newer f150 or something else that heavy that has
a regular caliper and electronic solenoid for a parking brake.

Downside, is those are useless for emergency purposes, at
least my new fusion is. You can't modulate them at all, but
I guess it is rare these days to get total brake failure and
need the emerg brake use at speed.

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post #20 of 29 (permalink) Old 04-20-2017, 01:11 PM
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That is one advantage of a drum brake over a disc. There is quite a bit more surface area being used in a drum brake, making it a pretty good parking brake. I suspect this is why Ford designed the rear disc assembly of the Explorers with a parking brake drum. The V8 versions of those '96-01 trucks have a towing capacity of almost 7000 lbs, so it makes sense.
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'79 Ford Bronco: 408-ZF5-NP205 SEFI-EDIS8; 4" lift, Dana 44/Ford 9" w/4.10s, locked
'00 Mountaineer:5.0L-4R70W-3.73 gears, stock
'89 5.0L LX hatch: full 90mm Blowzilla blown Dart 304 w/Vic Jr heads + TMoss ported GT40 lower @ 8.4:1
'66 Mustang GT: 289, T5Z, 3.89 gears and a Truetrac
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