70 pontiac full size B-body rotors - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Suspension - Brakes - Steering
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 04-29-2010, 02:05 AM
Registered User
 
Last photo:
Join Date: Jun 2009
Location: alabama
Posts: 192
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
70 pontiac full size B-body rotors

as the title says... 70 pontiac full size B-body rotors were can i get them ... advanced said the 71's would fit but i just dont believe it from someone that has never tried....

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-29-2010, 05:39 PM
Member
 
Last photo:
Join Date: Dec 2004
Location: ohio
Age: 66
Posts: 595
Wiki Edits: 0

Thanks: 0
Thanked 32 Times in 29 Posts
The later rotors fit.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-30-2010, 09:16 PM
Registered User
 
Last photo:
Join Date: Apr 2007
Location: il
Posts: 150
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
69-70 Pontiac brake rotors are on there own. Nothing else will work. The outer bearings bearings are differant for one. Have you actually tried this?

69-70 uses a #2 outer and #5 inner bearing
71-76 and most other full size use a #3 outer and #5 inner.

Most gm's use a combination of 2 and 6 or 3 and 5.

#2 .750 id, 1.781 od
#3 .8437 id , 1.969 od
#5 1.375 id, 2.563 od
#6 1.25 id, 2.328 od
each maker has differant prefixes, but they usually use the same basic number.
Sorry to get so technical, I just wonder how your getting past the bearing differance?

Back to the original question, it seems all the available new rotors have run out. There is one company , Scarebird that makes disc brake brackets for the non mainstream cars. At one time someone was looking for him to make some brackets for those spindles, yes it sounds funny to make a disc conversion for a spindle that already has disc brakes , but since no rotors are available maybe an option with using a ready available rotor or cut your rotor down to a hub and slip a rotor over it. .

Another option would be to find a pair or drum spindles and put his bracket that is already made for those and convert those over to disc brakes. I have an older kit that I have on 63 spindles available that would work on your 70. The old popular swap before disc brake kits came out was to put the 69-70 setup on the earlier 60"s Pontiacs. My 63 drum spindles reuse the drum hub and use a 11" rotor over the top . The newer kits use a 12" rotor like the original rotor.

Or find a good used set ?

Last edited by chieftain; 04-30-2010 at 09:22 PM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-30-2010, 10:54 PM
freedom53's Avatar
Registered User
 

Last journal entry: A Few Years Later...
Last photo:
Join Date: Feb 2007
Location: Saskatchewan
Posts: 95
Wiki Edits: 0

Thanks: 11
Thanked 0 Times in 0 Posts
i belie ve that I read somewhere that vette rotors can be used on the original hubs. these hubs use a different bolt that presses thru the rotor from the back side into the hub and mounts the wheel directly to the hub. wish I could remember where I saw it.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-02-2010, 11:32 AM
Member
 
Last photo:
Join Date: Dec 2004
Location: ohio
Age: 66
Posts: 595
Wiki Edits: 0

Thanks: 0
Thanked 32 Times in 29 Posts
Quote:
Originally Posted by chieftain
69-70 Pontiac brake rotors are on there own. Nothing else will work. The outer bearings bearings are differant for one. Have you actually tried this?

69-70 uses a #2 outer and #5 inner bearing
71-76 and most other full size use a #3 outer and #5 inner.

Most gm's use a combination of 2 and 6 or 3 and 5.

#2 .750 id, 1.781 od
#3 .8437 id , 1.969 od
#5 1.375 id, 2.563 od
#6 1.25 id, 2.328 od
each maker has differant prefixes, but they usually use the same basic number.
Sorry to get so technical, I just wonder how your getting past the bearing differance?

Back to the original question, it seems all the available new rotors have run out. There is one company , Scarebird that makes disc brake brackets for the non mainstream cars. At one time someone was looking for him to make some brackets for those spindles, yes it sounds funny to make a disc conversion for a spindle that already has disc brakes , but since no rotors are available maybe an option with using a ready available rotor or cut your rotor down to a hub and slip a rotor over it. .

Another option would be to find a pair or drum spindles and put his bracket that is already made for those and convert those over to disc brakes. I have an older kit that I have on 63 spindles available that would work on your 70. The old popular swap before disc brake kits came out was to put the 69-70 setup on the earlier 60"s Pontiacs. My 63 drum spindles reuse the drum hub and use a 11" rotor over the top . The newer kits use a 12" rotor like the original rotor.

Or find a good used set ?
I misread 70 as 71. It still can be done by using a set 34 outer bearing that fits the spindle and rotor, .8437 ID 1.8710 OD, and a spacer on the inner bearing. Another solution is a drum brake hub with a Toronado to 1976 rotor.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-21-2010, 11:06 AM
Registered User
 
Last photo:
Join Date: Jun 2009
Location: alabama
Posts: 192
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by chieftain
69-70 Pontiac brake rotors are on there own. Nothing else will work. The outer bearings bearings are differant for one. Have you actually tried this?

69-70 uses a #2 outer and #5 inner bearing
71-76 and most other full size use a #3 outer and #5 inner.

Most gm's use a combination of 2 and 6 or 3 and 5.

#2 .750 id, 1.781 od
#3 .8437 id , 1.969 od
#5 1.375 id, 2.563 od
#6 1.25 id, 2.328 od
each maker has differant prefixes, but they usually use the same basic number.
Sorry to get so technical, I just wonder how your getting past the bearing differance?

Back to the original question, it seems all the available new rotors have run out. There is one company , Scarebird that makes disc brake brackets for the non mainstream cars. At one time someone was looking for him to make some brackets for those spindles, yes it sounds funny to make a disc conversion for a spindle that already has disc brakes , but since no rotors are available maybe an option with using a ready available rotor or cut your rotor down to a hub and slip a rotor over it. .

Another option would be to find a pair or drum spindles and put his bracket that is already made for those and convert those over to disc brakes. I have an older kit that I have on 63 spindles available that would work on your 70. The old popular swap before disc brake kits came out was to put the 69-70 setup on the earlier 60"s Pontiacs. My 63 drum spindles reuse the drum hub and use a 11" rotor over the top . The newer kits use a 12" rotor like the original rotor.

Or find a good used set ?
so i really really need some rotors if i machine down the hub what rotors will fit over i read that same article about the vet rotors some time ago and cant remember were so any help here would be great ........sorry to bring such an old thread back to life
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 09-21-2010, 11:34 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
I believe it involves using the drum spindles w/rear 'Vette rotors and longer studs- but this needs to be verified.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 09-21-2010, 01:01 PM
Registered User
 
Last photo:
Join Date: Jun 2009
Location: alabama
Posts: 192
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thought it was just the drum or rotor hub machined down with an 70's year rear vet rotor but i could be wrong
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 09-28-2010, 06:42 AM
Jim Rockford's Avatar
World Famous VF-14
 

Last journal entry: Cleaned it up...
Last photo:
Join Date: Dec 2008
Location: Virginia
Age: 43
Posts: 411
Wiki Edits: 0

Thanks: 10
Thanked 0 Times in 0 Posts
you have the 5x5 BP correct?
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 09-28-2010, 11:56 AM
Registered User
 
Last photo:
Join Date: Jun 2009
Location: alabama
Posts: 192
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
5X4.75 i think same bolt pattern as a 96 caprice classic borrowed a spare tire from one
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 09-28-2010, 12:24 PM
Jim Rockford's Avatar
World Famous VF-14
 

Last journal entry: Cleaned it up...
Last photo:
Join Date: Dec 2008
Location: Virginia
Age: 43
Posts: 411
Wiki Edits: 0

Thanks: 10
Thanked 0 Times in 0 Posts
1991 the bolt pattern for the caprices reverted to the 5x5 like the previous wagon and police package. you might be able to use some front rotors from a 91-96 caprice. alot of the b body stuff stayed the same from the 70-96.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 09-29-2010, 08:48 AM
Registered User
 
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 3,534
Wiki Edits: 1

Thanks: 6
Thanked 148 Times in 135 Posts
Quote:
Originally Posted by Jim Rockford
alot of the b body stuff stayed the same from the 70-96.
No, the commonality is 1971-1996. The 1965-1970 cars are completely different.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 09-29-2010, 08:08 PM
Jim Rockford's Avatar
World Famous VF-14
 

Last journal entry: Cleaned it up...
Last photo:
Join Date: Dec 2008
Location: Virginia
Age: 43
Posts: 411
Wiki Edits: 0

Thanks: 10
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by joe_padavano
No, the commonality is 1971-1996. The 1965-1970 cars are completely different.
I ment to type 77-96..lol I have heard alot of stuff back to 71 would work for later models, but haven't tried it.
Reply With Quote Quick reply to this message

Recent Suspension - Brakes - Steering posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
this is a saver.... GM build codes TooMany2count General Rodding Tech 24 11-23-2009 09:36 AM
Full Manual Valve Body TH-400 Chezelle Transmission - Rearend 3 06-13-2003 06:47 PM
T-350 Modify stock valve body to full manual Mr. Horsepower Transmission - Rearend 7 05-26-2003 10:21 AM
'70 Buick GS body parts speedpro Body - Exterior 1 11-07-2002 11:56 AM
Size of Ford T-bucket body? wannabe Body - Exterior 0 09-28-2002 07:42 PM


All times are GMT -6. The time now is 03:31 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.