Pushrod Length - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old Apr 21st, 07, 10:54 PM Thread Starter
Senior Tech
 
Join Date: Dec 2004
Posts: 126
Pushrod Length

Folks,

I tried searching this forum for information on brake pedal to master cylinder pushrod length and was unable to locate the answer to the following:

When converting from a power assisted disc/drum setup to a manual disc/drum setup, does anyone know the correct length for the pedal to master cylinder pushrod?

Thanks,
Bill

67 327 4 speed Marina Blue 60,000 mile all original<br /><br />68 250 2 speed Ermine White miled out all original<br /><br />69 L78 4 speed Garnet Red restored and owned since 1982<br /><br />1980 Z28 LM1 4 speed Dark Blue 35,000 mile all original<br /><br />contact Bill via e-mail -
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Billy.B is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old Apr 22nd, 07, 12:25 AM
Senior Tech
Steve
 
Join Date: Jun 2005
Location: Melbourne, Australia
Posts: 2,864
Re: Pushrod Length

I think you need an extra 1 3/8" (1.375") in length. (or 1 3/8" less going to manual brakes.. I'm unsure.)

I had the same (or similar) problem to you and easily had an extension made.
http://forums.hotrod.com/ubbthreads/...&page=4#151267
Scroll down until you see this picture.

Nov 68 Van Nuys. 327 floor-shift-auto, Frost Green and not much else when new.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BlackoutSteve is offline  
post #3 of 6 (permalink) Old Apr 22nd, 07, 09:22 AM Thread Starter
Senior Tech
 
Join Date: Dec 2004
Posts: 126
Re: Pushrod Length

Steve,

Thanks for that link. Excellent info. I might be overthinking this as I am going from an OEM power brake setup to an OEM manual brake setup . Should I simply require a shorter pushrod from an OEM manual brake master cylinder? If so, are they available through aftermarket or parts stores?

Thanks,
Bill

67 327 4 speed Marina Blue 60,000 mile all original<br /><br />68 250 2 speed Ermine White miled out all original<br /><br />69 L78 4 speed Garnet Red restored and owned since 1982<br /><br />1980 Z28 LM1 4 speed Dark Blue 35,000 mile all original<br /><br />contact Bill via e-mail -
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Billy.B is offline  
 
post #4 of 6 (permalink) Old Apr 23rd, 07, 09:34 PM Thread Starter
Senior Tech
 
Join Date: Dec 2004
Posts: 126
Re: Pushrod Length

Folks,

Thanks to a ton of information on this site I was able to get to this point in making a decision on which components to purchase.

Would anyone like to take their best shot at advising on the correct combination of the following parts to convert from a power disc/drum combo to a manual disc/drum combo on a 69 big block car with the original J52 brake package? :

1351 master cylinder - Corvette non-power
1352 master cylinder - Corvette power assist

Y00076-LR master cylinder actuating rod, long - from drclassic.com
Y00076-BR master cylinder actuating rod, short - from drclassic.com
Y00168 manual push rod 67-69, adjustable - from drclassic.com

OEM prop valve + residual valve
Aftermarket prop valve

Also, why do the 2 masters I have looked at (1351 & 1352) do not have bleeder screws?

Any help would be appreciated.

Thanks,
Bill

67 327 4 speed Marina Blue 60,000 mile all original<br /><br />68 250 2 speed Ermine White miled out all original<br /><br />69 L78 4 speed Garnet Red restored and owned since 1982<br /><br />1980 Z28 LM1 4 speed Dark Blue 35,000 mile all original<br /><br />contact Bill via e-mail -
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Billy.B is offline  
post #5 of 6 (permalink) Old Apr 23rd, 07, 10:59 PM
Senior Tech
 
Join Date: Jul 2005
Location: California
Posts: 2,353
Re: Pushrod Length

Most of the aftermarket masters do not have the bleeders built in. Should not be a problem, but you will need to bench bleed the master before you install it

I would go with the manual master cylinder for two reasons: its is more likely to have the deep cup in the piston to hold the push rod in place, and the diameter will be smaller for a better pedal effort
I would look at David Pozzi's site for more information on the masters

and a long push rod, because you need it with the deep master

I don't know if you already have heard or read this, but you also need a brake pedal return spring. And you have to move the push rod to the upper hole in the brake pedal

Also, as long as you will still be using the same disc/drum brakes I would leave the proportioning and residual valves in place
400bird is offline  
post #6 of 6 (permalink) Old Apr 25th, 07, 07:06 AM Thread Starter
Senior Tech
 
Join Date: Dec 2004
Posts: 126
Re: Pushrod Length

Thank you.

67 327 4 speed Marina Blue 60,000 mile all original<br /><br />68 250 2 speed Ermine White miled out all original<br /><br />69 L78 4 speed Garnet Red restored and owned since 1982<br /><br />1980 Z28 LM1 4 speed Dark Blue 35,000 mile all original<br /><br />contact Bill via e-mail -
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Billy.B is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Pushrod length checkers travis Performance 9 Oct 23rd, 06 12:10 PM
March Performance Serpentine Set Up question #100 30lbtest Engine 5 Sep 27th, 06 10:20 PM
Pushrod length issue, check it out Camaro76350 Performance 8 Sep 19th, 06 06:57 PM
Setting Pushrod Length - Solid/Hydrolic lifter JHunter Performance 2 Aug 2nd, 05 09:19 PM
Pushrod length with hydraulic lifters... JIM68 Performance 5 Jan 17th, 03 05:53 AM

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

 
For the best viewing experience please update your browser to Google Chrome