drum to disc conversion? - 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 05-25-2008, 06:51 PM
Registered User
 
Join Date: Mar 2008
Location: louisiana
Posts: 102
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
drum to disc conversion?

i have a 1970 nova i want to change to disc brakes in the front. do i need to change my master cylinder and proportioning valve to? not power brakes.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-26-2008, 07:10 AM
Registered User
 
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 3,569
Wiki Edits: 1

Thanks: 6
Thanked 156 Times in 143 Posts
Quote:
Originally Posted by novacrazy2007
i have a 1970 nova i want to change to disc brakes in the front. do i need to change my master cylinder and proportioning valve to? not power brakes.
Yes. First, a drum/drum system doesn't even have a proportioning valve. Second, the master cylinder is very different between drum and disc systems. You probably should learn a little more about this before attempting it, for your own safety. The good news is that your 70 Nova uses the same brakes and spindles as a 67-69 Camaro, so parts and kits should be very easy to find.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-26-2008, 09:40 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,389
Wiki Edits: 31

Thanks: 2
Thanked 58 Times in 54 Posts
you don't really need to change the master cylinder. just insert a sheet metal screw into the center of the port for the front resivore, pull it out with a pair of pliers, that removes the 10# built in RPV, the only thing keeping you from using the drum brake M/C
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-26-2008, 09:54 AM
Registered User
 
Join Date: Mar 2008
Location: louisiana
Posts: 102
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
conversion

is that where the line hooks up to or iside the bowls themselves? thanks
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-26-2008, 10:11 AM
Registered User
 
Join Date: Mar 2008
Location: louisiana
Posts: 102
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
brakes

there is a bolt in the first resivour? do you mean that?
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-26-2008, 01:43 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,389
Wiki Edits: 31

Thanks: 2
Thanked 58 Times in 54 Posts
if you look at the port where your front brake line hooks into, you will see a peice of rubber and in the center there is a small brass ring. insert the sheet metal screw in that and pull it out, it will take the rubber and brass ring with it. that stuff ls the built in 10# RPV ( requiered on drum brakes ). it will work with discs after you remove it.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-26-2008, 05:08 PM
Registered User
 
Join Date: Mar 2008
Location: louisiana
Posts: 102
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
brakes

ahh gotcha now! thanks.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-26-2008, 10:01 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 64
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
'68-'74 Nova (and clone) parts will also work. '69 & later uses the single-piston caliper design, earlier uses the 4-piston units. The single is less prone to leakage and is easier to find parts for.

Your current steering arms will work, but if you find a set that are shorter, they'll give you quicker steering. Do NOT use Chevelle steering arms, they will screw up your steering geometry. Chevelle (and clone) spindles ('68-'72) will work, though.

http://nnnova.com/article_info.php?articles_id=13 is the National Nova Club's disc brake section. They used to machine drum-brake spindles to disc-brake specs, but I don't know if they still do.

Last edited by jimfulco; 05-26-2008 at 10:07 PM.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-26-2008, 10:37 PM
2-manytoyzs's Avatar
Start those projects someday
 

Last journal entry: Divco - has been on the back burner
Last photo:
Join Date: Dec 2002
Location: Fresno
Age: 64
Posts: 557
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I used a '72 parts car (thats when you could still find parts cars) for the change over on my '71 and changed everything including spindles, calipers, hubs, brake lines and master cyl, then found the brake lines were different, and they didn't line up to the rear wheels cylinders. So I changed the rear end and the multi-leaf springs. Everything is different between the drum brake car and the disc brake option on a stock vehicle. The rear wheel pistons are also a different size.
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
drum to disc conversion kits dmented Suspension - Brakes - Steering 4 06-06-2007 09:06 PM
1971 Nova rear drum to disc conversion. 1971 Nova Suspension - Brakes - Steering 5 12-12-2006 03:07 PM
69 Camaro Drum To Disc Conversion kellycat Suspension - Brakes - Steering 3 01-16-2006 01:18 AM
Hotrodders Knowledge Cluster: Disc Brake Conversions Jon Suspension - Brakes - Steering 0 08-29-2003 03:34 PM
55 chevy bel air drum to disc conversion tk6002 Suspension - Brakes - Steering 1 11-25-2002 09:56 PM


All times are GMT -6. The time now is 02:44 AM.


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.