Power brake options???
#2968337
09/29/21 08:23 AM
09/29/21 08:23 AM
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Joined: Jun 2003
Posts: 2,412 Weatherford, Texas
RapidusMaximus
OP
top fuel
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OP
top fuel
Joined: Jun 2003
Posts: 2,412
Weatherford, Texas
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So….I’m in the middle of building a 76 SWB big block truck and I want to install the power brake system before I put the dash back in…not so fast there big boy…vacuum boosters are currently made out of unobtainium. Looks like the current best option is to send this one in for rebuild….is there another option, aftermarket maybe, like wilwood or??? Thanks…
Last edited by RapidusMaximus; 09/29/21 11:23 AM.
1968 Plymouth GTX 1974 Dodge P/U Long Bed Stepside 318 2019 Ram 2500 6.4, auto, 4WD
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Re: Power brake options???
[Re: RapidusMaximus]
#2968411
09/29/21 11:59 AM
09/29/21 11:59 AM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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Ouch, thanks for the info, but that’s 840 dollars after you add the correct m/c and required hoses… I know, cost rarely deters me. That's why I suggested asking Guitar Jones about his conversion.
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: Power brake options???
[Re: 440_Offroader]
#2968699
09/30/21 09:49 AM
09/30/21 09:49 AM
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RWG75
Unregistered
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RWG75
Unregistered
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Ya absolutely need the small diameter booster to clear 440 valve covers if you ever expect to remove them. Might be able to shoe horn it past the larger one but I doubt it and will be almost zero clearance. Swapping the 3/4 ton dual diaphragm has been the ticket for years. Ya might also look at 70s C-bodies as they ran dual diaphragms too. They should all be 4 bolt masters and not sure about the firewall bolt pattern. As far as getting one remanned, last I knew the only place for that was carid and quality was suspect at best.
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Re: Power brake options???
[Re: 3hundred]
#2968891
09/30/21 08:08 PM
09/30/21 08:08 PM
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Joined: Dec 2009
Posts: 20,647 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,647
in a cattle trailer down by th...
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Like 440 offroader I used a HB off a 2000 Cummins truck, but since mine is a diesel I couldn't use it as is because it's too long and hit the intake elbow. I made a flat plate to mount the unit to the firewall and shortened the pushrod. I used hoses and master cylinder from the 2000 truck as well as the power steering pump to get the two return nipples. You can just tee off the single though. Now I guess the ticket is to get the entire assembly off 2500 GM van, (a "G" I think) that already has the flat plate and is supposed to bolt directly to the firewall but the pushrod eye is different. This unit clocks the HB and master cylinder differently and probably needs custom hoses. Both will need M/C to proportioning valve lines made. You can buy a reseal kit for the HB off ebay, they all take the same kit. You need a special tool to remove the pushrod though if you plan to change that. The big nut that holds the HB unit to the bracket is 1 7/8" I believe, but don't quote me on that.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Power brake options???
[Re: moparmarks]
#2969517
10/02/21 07:34 AM
10/02/21 07:34 AM
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Joined: Dec 2014
Posts: 5,895 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,895
ohio
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Quick correction to GJ about the return line, DO NOT T them together, both need to run to the reservoir.
A single line can't flow enough and leads to funky problems with things like self activation of the brakes.
Also, 2 bolt dual boosters are available, 85 W250 is one application. Might depend on gvw.
Last edited by ruderunner; 10/02/21 07:35 AM.
Angry white pureblood male
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Re: Power brake options???
[Re: ruderunner]
#2969524
10/02/21 08:18 AM
10/02/21 08:18 AM
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Joined: Dec 2009
Posts: 20,647 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,647
in a cattle trailer down by th...
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Quick correction to GJ about the return line, DO NOT T them together, both need to run to the reservoir.
A single line can't flow enough and leads to funky problems with things like self activation of the brakes.
Also, 2 bolt dual boosters are available, 85 W250 is one application. Might depend on gvw. Many of the kits use this method as does the one posted earlier in the thread. I didn't do it on mine though. Plenty of guys on the 1st gen forums have done the same and I haven't seen any reported problems so it's news to me.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Power brake options???
[Re: Guitar Jones]
#2970005
10/03/21 03:01 PM
10/03/21 03:01 PM
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Joined: Dec 2014
Posts: 5,895 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,895
ohio
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On an IH forum I'm on, people do quite a few Hydroboost swaps. Some have had problems with T fittings.
Think about this, most, maybe all, OEM applications have separate returns requiring tooling for different reservoirs. If a T was adequate they would do that instead.
Personally I'm not a fan of Hydroboost. Don't care for the pedal feel and Ford systems are awful. You lose power steering assist if you're on the brakes hard.
Angry white pureblood male
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Re: Power brake options???
[Re: ruderunner]
#2970110
10/03/21 09:48 PM
10/03/21 09:48 PM
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Joined: Dec 2009
Posts: 20,647 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,647
in a cattle trailer down by th...
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Oh I get it and that is why I used a hydro power steering pump on mine, I just never heard of problems with the T. I love my hydroboost, the brakes have never worked so well on my truck. I may do the crew cab in the future too.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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