Aluminum Corvette style MC? - 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 06-05-2011, 01:12 PM
staleg's Avatar
Registered User
 

Last journal entry: Hand brake
Last photo:
Join Date: Dec 2005
Location: Norway - Europe
Age: 47
Posts: 782
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Aluminum Corvette style MC?

I just discovered that my 1 1/8" GM master cylinder is for disc/drum. My brakes are disc/disc, so I have to change it.

While I'm at it, I would like to change to a MC made of aluminum to save some weight. Speedway Motors sell the Corvette style MC in aluminum, but only 1" bore. I have planned and made my brake set up for 1 1/8" and I would like to stick to it.
There are some 1 1/8" bore MC's on Ebay. The price indicates China stuff. Does any of you have experiences with them?

I don't want to change MC type, since I have the special cap made for external inspection reservoars.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-05-2011, 03:18 PM
aosborn's Avatar
Registered User
 
Last wiki edit: Suspension: designs, shapes, sizes Last photo:
Join Date: Oct 2008
Location: Lakewood, WA
Posts: 621
Wiki Edits: 7

Thanks: 0
Thanked 17 Times in 16 Posts
You don't have to change it, just pull out the residual pressure valve (if it has one) from the port going to the drum brakes and it will work perfectly.

Andy
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-06-2011, 12:04 AM
staleg's Avatar
Registered User
 

Last journal entry: Hand brake
Last photo:
Join Date: Dec 2005
Location: Norway - Europe
Age: 47
Posts: 782
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
My master cylinder is a GM, but probably not a Corvette MC.
The two reservoirs are very different sized. The rear one is app 1/3 of the front one.
I do need a new one.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-06-2011, 12:10 AM
NEW INTERIORS's Avatar
Believe in yourself !!!!!!
 

Last journal entry: 41 WILLYS FRAME
Last photo:
Join Date: Jul 2007
Location: In My Shop..
Age: 49
Posts: 10,096
Wiki Edits: 0

Thanks: 1,248
Thanked 549 Times in 407 Posts
Quote:
Originally Posted by staleg
My master cylinder is a GM, but probably not a Corvette MC.
The two reservoirs are very different sized. The rear one is app 1/3 of the front one.
I do need a new one.
For disc/disc you will need the one with two big reservoirs..
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-06-2011, 12:56 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,388
Wiki Edits: 31

Thanks: 2
Thanked 57 Times in 53 Posts
Yep. beyond the diffrent sized resivores, the disc/ drum master has 10# residual preassure valves built in the drum side. It could be pulled out with a sheet metal screw, but you would still be left with the wrong M/C..

Disc/Disc corvette master had a 1 1/8" bore.. Should be pretty widely available at the parts store, cap you have may work, but being for a disc/ drum it won't be right for a disc/disc with equal resivores.. Just ask for a '67 or '68 Corvette Master. actually I'm not sure what all years remained the same. I know '67-'68 are tho.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-06-2011, 05:46 AM
staleg's Avatar
Registered User
 

Last journal entry: Hand brake
Last photo:
Join Date: Dec 2005
Location: Norway - Europe
Age: 47
Posts: 782
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
The divider wall between the two reservoirs are in the middle of the opening at the top where it seals against the cap. So my cap will work.

The divider wall goes diagonal down agains the front reservoir and makes this much smaller than the rear one.

Most of the aluminum "Corvette copy" MC's are 1" bore. 1 1/8" bore are harder to find in aluminum.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-06-2011, 09:32 AM
staleg's Avatar
Registered User
 

Last journal entry: Hand brake
Last photo:
Join Date: Dec 2005
Location: Norway - Europe
Age: 47
Posts: 782
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Just bought an aluminum 1 1/8" bore MC from Pirat Jack for 125 USD insted of a -claimed to be- identical one on Ebay for 60 USD...

Hopefully i get what I pay for.

Last edited by staleg; 06-06-2011 at 09:49 AM.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-06-2011, 07:15 PM
aosborn's Avatar
Registered User
 
Last wiki edit: Suspension: designs, shapes, sizes Last photo:
Join Date: Oct 2008
Location: Lakewood, WA
Posts: 621
Wiki Edits: 7

Thanks: 0
Thanked 17 Times in 16 Posts
If you get hung up with the new master cylinder you ordered, as I stated you can use the master cylinder you have if you remove the check valve. With the smaller reservior you will just have to be a bit more diligent on maintaining the fluid level. Without the check valve on the drum brake side, it will function exactly the same as a disk/disk master cylinder.

Andy
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-06-2011, 11:29 PM
staleg's Avatar
Registered User
 

Last journal entry: Hand brake
Last photo:
Join Date: Dec 2005
Location: Norway - Europe
Age: 47
Posts: 782
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Thanks for the info! I might look into that too.
I have a Jaguar IRS. Not sure how reservoir size they need.

The weigth of the iron MC made me want to change to an aluminum one anyway. And with the big different in reservoir sizes, I decided to do it.

QFT carb, Aluminum radiator, -water pump, -intake and -master cylinder. It should be some saved lbs, I guess.

Still have iron heads, tow...
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
April Hotrodders Art Contest 53-67 Corvette Anything Goes Style: Only Racing Hot Rod Art 63 04-27-2009 01:49 AM
Aluminum Corvette heads on SB 400 Tymer Engine 12 07-28-2008 12:28 PM
Corvette Aluminum Heads solidaxel Engine 1 03-25-2007 12:16 PM
Early Corvette style oil filler tube/PCV '31Av8 Engine 3 12-08-2003 02:50 PM
62 corvette aluminum intake manifold custom Engine 1 10-22-2003 08:49 PM


All times are GMT -6. The time now is 05:31 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.