Power brake booster conversion

GNGREN · Oct 24, 2007

I know this is a place not to be cheap on, but I was wondering if anybody has seen or had any experience with something like this? Power Brake booster conversion I want a little more stopping power until I can afford to do a front disk conversion. I like that I won't need to drill the pedal support and install a different pedal. Also the way I figure I should be able to get a disk/disk master cylinder and bolt to the booster when the time comes for the disk swap. Dose it seem like something I should keep my eye out for? I can't see spending over $100.00 at one of the mail order shops just for a name brand, but again I know this isn't the spot to be cheap on.

Gailahan · Oct 24, 2007

A power brake booster isn't made to give you more stopping power, but to lessen the braking effort. If it was me I would save up and do the brakes all at once.

Rusty67 · Oct 24, 2007

If you want to add a brake booster then go to your local parts store and just buy one.

A1 cardone part number: 5473207 replacement part for 87-93 V8 Mustangs. Bolts into a classic without pedal support modifications and will accept a drum or disc MC. You can then change the MC out later when you go to a disc setup.

The only other thing I think you will need is a new pushrod for the booster setup and of course you will need to modify your hard lines.

ultrastang · Oct 24, 2007

Rusty67 said:
If you want to add a brake booster then go to your local parts store and just buy one.

A1 cardone part number: 5473207 replacement part for 87-93 V8 Mustangs. Bolts into a classic without pedal support modifications and will accept a drum or disc MC. You can then change the MC out later when you go to a disc setup.

The only other thing I think you will need is a new pushrod for the booster setup and of course you will need to modify your hard lines.

Mmmm...well, not exactly.

If you are going to put a brake booster in your '67, the easiest (but not neccesarily the cheapest) route would be to buy a stock booster and power brake pedal for a '67/'68 Mustang.

The Fox Mustang boosters will work, but you WILL have to modify the firewall and the pedal support.

Nothing has to be changed on the Fox booster's input or output rods, because they are integral to the booster itself.

Fox booster conversion I did on my '68:
http://www.ultrastang.com/Ultrainfo.asp?Page_ID=16

This is the plate I made to weld to the face of the pedal support:
http://img137.imageshack.us/img137/8451/foxbrakeboostertemplatepx5.jpg

This is what the plate looks like installed on the pedal support:
http://img137.imageshack.us/img137/7255/68pedalsuppoert002kt1.jpg

http://img502.imageshack.us/img502/92/68pedalsuppoert003ye1.jpg

But as I said, the easiest solution is to use a stock '67 brake booster and power brake pedal. At the time I did the Fox booster conversion, I didn't have a stock '68 booster or a power brake pedal, but I did have a 5.0L booster from a '90 Mustang GT parts car, so I used what I had at the time.

mikethebike · Oct 24, 2007

I wouldn't go P/B at this point. I would first decide which disc/drum or disc/disc combo to use, intstall it, drive it for a few weeks and then make the P/B decision, If you go with the big brakes a lot of people like these days you may not need the power assist. If you can do a disc conversion that does not require a power assist unit you are ahead of the game in pedal feel, complexity and room under your hood.

Rusty67 · Oct 24, 2007

Utrastang, correct me if I'm wrong, but you were using a 2.3L booster for an early 80s Mustang ? The part I'm talking about is an 87-93 v8 booster. As far as I know they are different boosters ?

ultrastang · Oct 24, 2007

Rusty67 said:
Utrastang, correct me if I'm wrong, but you were using a 2.3L booster for an early 80s Mustang ? The part I'm talking about is an 87-93 v8 booster. As far as I know they are different boosters ?

The "2.3L-style" booster was used in 2.3L Mustangs from '79-'93 and also in the 5.0L Mustangs from '82-'86. In '87, the 5.0L LXs and GTs, as well as the 2.3L convertibles went to the smaller diameter 5.0L-style brake booster. --regular 2.3L coupes and hatchbacks still had the 2.3L type booster in them through 1993.

I initially had a 2.3L brake booster that I used, but it left me no clearance for the hyd. clutch MC to mount in the hole on the firewall, where the old clutch rod linkage used to pass through:
1. http://www.ultrastang.com/Images/Scanned/Sept2002/31.jpg

2. http://www.ultrastang.com/Images/Scanned/Sept2002/26.jpg

Since the booster stud mounting pattern on the back of the 2.3L booster is the same as the 5.0L booster, and the input rod length is the same, all I had to do was swap out the 2.3L booster and put the 5.0L booster in the same (modified) holes:

2.3L booster on left. 5.0L booster on right:
1. http://www.ultrastang.com/Images/Scanned/Jan2003/002.jpg

2. http://www.ultrastang.com/Images/Scanned/Jan2003/003.jpg

5.0L booster installed with hyd. clutch MC mounted next to it:
1. http://www.ultrastang.com/Images/Scanned/Jan2003/007t.jpg

2. http://www.ultrastang.com/Images/Scanned/Jan2003/008t.jpg

68EFIvert · Oct 24, 2007

Rusty67 said:
Utrastang, correct me if I'm wrong, but you were using a 2.3L booster for an early 80s Mustang ? The part I'm talking about is an 87-93 v8 booster. As far as I know they are different boosters ?

The mounting points are the same on the 4 and v8 boosters. How do I know? I installed both on my 68. I found out that the "v8 booster" I bought on eBay was really a 4 cyl booster and had a much larger diameter but shorter than than a real V8 booster. It caused clearance problems with my clutch linkage. I went to a jy and picked up a v8 booster and everything was cool. I followed ultrastangs instructions and everything went well. If I were to do it over again I would go with a stock booster or use one of those billet firewall adapters that has a mounting flange for a street rod type booster on one side and mounts to your original manual booster holes on the firewall. You can find them at speedwaymotors.com.

http://www.speedwaymotors.com/p/620...ster-Conversion-Plate.html?itemNo=power brake

BarnStang · Oct 25, 2007

www.discbrakeswap.com
Dennis also has some options for power brakes. We have his kit for our 67 project. Not installed yet. Sorry. But I'm pretty sure the 67-68 kits are regular parts available to the public now. I'll have pictures when we get to that stage, but the proj got put on hold again. Those pesky customers keep showing up

GNGREN · Oct 25, 2007

BarnStang said:
www.discbrakeswap.com
Dennis also has some options for power brakes.

I looked but didn't see anything on booster kits on his sight. Although his Swap.2 kit is what I have been looking at for when I get around to doing the disk conversion. Just with the building market now adays not sure if I will get a decent bonus this year or not...
I guess after reading it again I worded my first post wrong. I am looking at doing the booster for the reduced pedal effort. My wife has problems stopping the car, she is a bit petite. I have all new lines and drum rebuild components sitting in my garage for this winter. It should help with the pedal effort just rebuilding everything and replacing all the hard and soft lines. I came at this whole project completely wrong. I have had a change of goals since I started so I have stuff that I can't return because I have had it sitting in the garage for about a year now. I haven't had the time to work on the car like I thought/hoped. When I started I just wanted to get her on the road and drive it, trying to remember all of the items that needed replaced since I sold the car a few years prior.(The guy I sold it to got her painted but didn't do much else to it for the 8 or so years he had her.) I was just excited to get the first car I ever owned back!! So I figure if I am going to be redoing/replacing the the braking system at this time (Also installing a line lock.) It would be the time to do the booster install.

BarnStang · Oct 25, 2007

Sorry bout that. I forgot the brake booster was not on the site. There is an email address: info@discbrakeswap.com

degins · Oct 25, 2007

BarnStang said:
Sorry bout that. I forgot the brake booster was not on the site. There is an email address: info@discbrakeswap.com

I stock a lot of parts and kit systems not offered at my site. I do have a power disc upgrades for 65-66 automatic trans cars, and for 67-70 cars. The 67-70 kit uses a new Bendix booster (the same type used originally). The 67-70 kit comes with a power pedal (manual trans user are required to alter the auto type pedal included). There are boosters that will connect to the manual brake pedal, but the pedal ratio is going to be wrong. The Bendix type I refer to looks like the 8 cylinder 80's FOX booster, but has the proper mounting bracket. You can see it on NPD's online catalog (2005-16A, $249). Mine is identical except for the price.

bdepedro · Oct 26, 2007

GNGREN said:
I know this is a place not to be cheap on, but I was wondering if anybody has seen or had any experience with something like this? Power Brake booster conversion I want a little more stopping power until I can afford to do a front disk conversion. I like that I won't need to drill the pedal support and install a different pedal. Also the way I figure I should be able to get a disk/disk master cylinder and bolt to the booster when the time comes for the disk swap. Dose it seem like something I should keep my eye out for? I can't see spending over $100.00 at one of the mail order shops just for a name brand, but again I know this isn't the spot to be cheap on.

I purchased a booster conversion kit from the same vendor and installed it this summer. I already had front discs and agree that I would go front discs before going to power brakes and see if then you want the power.

The '69-70 mustangs are quite a bit heavier than the early stangs and even with front discs I had to really stand on the brake pedal before. Now with the power brakes the effort is a lot easier. Even though I didn't have to change my brake pedal I have noticed that the pedal is a little higher than it was before. I'll have to see if I can adjust that at all.

Power brake booster conversion

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