Go Back   Ford Mustang Forums > Mustang > Classic Mustang > Classic Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

Classic Forums | Classic Talk | Classic Tech | Classic Pictures | Introductions | Mustang Tech | Mustang Lounge 


Reply   Post New Thread
Unread 05-20-2008   #16 (permalink)
ontheball2 is offline Apprentice

Classic Member


Joined: Dec 2007
Posts: 55 Threads: 22
 ontheball2's Country Flag  View ontheball2's 6 photos
Stafford   Virginia
ontheball2 is on a distinguished road
Default

I have been thru all of your problems. Let me ask you did you change the brake pedal to a power pedal and if so was it a 67-69 power pedal? This is important. Second are you using a brake booster for 67-69. Because there is a difference in the 70 booster. The way you can tell the 67-69 booster pushrod where it connects to the brake pedal has a curved end unlike the 70 which is straight. Also the 67-69 bendix booster has a spacer plate on the backside which sets up the pedal height. The 70 booster is also different. You CAN NOT interchange any of these parts even if they seem to fit. This is why you have low or touchy brakes. The disc brakes from the 70 donor car are not the problem. For safety reasons you want to get a combination proportioning valve. A proportioning valve does not cause touchy or low pedal brake problems. Its only purpose is to control how much fluid and pressure to the rear/front. Hope this helps
ontheball2 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 05-20-2008   #17 (permalink)
ontheball2 is offline Apprentice

Classic Member


Joined: Dec 2007
Posts: 55 Threads: 22
 ontheball2's Country Flag  View ontheball2's 6 photos
Stafford   Virginia
ontheball2 is on a distinguished road
Default

Just wanted to give you the list for the correct parts: 1-67-69 power brake pedal, 2-67-69 power brake light switch, 3-67-69 bendix booster with spacer and master as a unit, 4-combination proportining valve. Make sure that you have the correct brake pedal mounting bracket. This will solve your problems. Also if you want to see the correct parts go to MustangSteve FAQ- brake pedals
ontheball2 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 05-20-2008   #18 (permalink)
daysvilleman is offline Rookie


Joined: Apr 2008
Posts: 10 Threads: 3
 daysvilleman's Country Flag
Pulaski   New York
daysvilleman is on a distinguished road
Default

All the components I have are 1970 components i.e brake pedal, switch, m/c and booster as well as all the brake calipers cylinders and distribution block. I would assume that all these together should work properly which should avoid me having to step down to a 67-69 set up.

I will look into you suggestions though to see what i come up with

thanks
daysvilleman is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 05-21-2008   #19 (permalink)
ontheball2 is offline Apprentice

Classic Member


Joined: Dec 2007
Posts: 55 Threads: 22
 ontheball2's Country Flag  View ontheball2's 6 photos
Stafford   Virginia
ontheball2 is on a distinguished road
Default

I read all of your post again. Do you have a bendix style booster with the spacer plate on the back or the midland booster with the band around it and spacer on the front? Why I ask because the midland booster has a spacer that mounts right behind the master cylinder which might explain why your booster pushrod is to long. You have to make sure you get the correct setup. 1-1970 bendix booster with spacer on back,disc/drum master or midland booster with spacer on the front,disc/drum master. 2-recheck brake pedal, it should be 4.5 inches from pivot mount to brake switch mount(center to center) and correct mounting bracket 3- possible that you have reversed or crossed brake lines(the larger bowl in the master goes to the front) 4- get a good combo proportioning valve. Got mine from NPD,part#2b091-20ba
ontheball2 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 05-21-2008   #20 (permalink)
ontheball2 is offline Apprentice

Classic Member


Joined: Dec 2007
Posts: 55 Threads: 22
 ontheball2's Country Flag  View ontheball2's 6 photos
Stafford   Virginia
ontheball2 is on a distinguished road
Default

Also did you enlarge the hole in the firewall where the booster mounts? A car that came from the factory with drum/drum setup was different than disc/drum. The hole thru firewall is about 3/4 inch higher with the disc/drum setup. You still go to MustangSteves FAQ brake pedals and see all of the correct setups.
ontheball2 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 05-21-2008   #21 (permalink)
daysvilleman is offline Rookie


Joined: Apr 2008
Posts: 10 Threads: 3
 daysvilleman's Country Flag
Pulaski   New York
daysvilleman is on a distinguished road
Default

I am using the Bendix style booser with spacer plate. As far as pivot point i will have to measure it. I never changed the hole on the firewall since it seemed to fit correctly. I will look into you suggestions

thanks
daysvilleman is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 05-21-2008   #22 (permalink)
ontheball2 is offline Apprentice

Classic Member


Joined: Dec 2007
Posts: 55 Threads: 22
 ontheball2's Country Flag  View ontheball2's 6 photos
Stafford   Virginia
ontheball2 is on a distinguished road
Default

Also check your vacumn. You should have the booster vacumn line hooked into the tee that is in the manifold not in the back of the carb. You also have to have a minimum of 15-17 psi pressure for booster to work correctly.
ontheball2 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-05-2009   #23 (permalink)
guysclassics is offline Rookie

Classic Member


Joined: Oct 2009
Posts: 2 Threads: 1
 guysclassics's Country Flag  View guysclassics's 1 photo
Oshawa   Ontario
guysclassics is on a distinguished road
Default

I am just about to install a new brake booster on my 68 Mustang all drum brakes and found out here in the forum that there is a big difference for the pin positions with manual brakes vs power brakes. The pin position effects the amount of travel and pedal power while applying the brakes. A power brake pedal is also needed to complete your swap.
Guy
guysclassics is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 11-05-2009   #24 (permalink)
chockostang is offline Registered User


Joined: Jul 2009
Posts: 657 Threads: 0
 chockostang's Country Flag
Murrayville   Illinois
chockostang is on a distinguished road
Default

Just a Couple QUICK Facts.

The Entire 70 Disc Brakes, Pedal, Booster, Lower Components will Function Perfect in a 67-68-69 Mustang.

As Stated by a Member, Booster, and Pedal Need to be Matched, 69 to 69, 70 to 70.

Masters are all same, 67-72 on Power Disc Cars.

Proportioning valves Reside in the Rear Brake line, After Leaving the Block/Proportioning valve.

Hopefully this helps.
Dan


www.chockostangclassicmustang.com
chockostang is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162