The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Suspension

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-29-2011, 10:42 PM   #1
Mieser3
Registered User
 
Mieser3's Avatar
 
Join Date: Sep 2010
Location: KS
Posts: 348
Which Master Cylinder Bore Size?

Looking to purchase my Wilwood master cylinder and Wilwood proportioning valve so that I can finally finish up my brake system but I'm unclear on which bore size I need. I am running Wilwood D52 dual piston calipers front and back with 3/16" stainless steel brake lines. I plan on getting this proportioning valve:

http://www.wilwood.com/MasterCylinde...emno=260-11179

I will be getting this master cylinder:

http://www.wilwood.com/MasterCylinde...mno=260-8555-P

There are 3 different bore sizes available: 7/8", 1" or 1 1/8". Which bore size do I need for my application?

Thanks!
__________________
Jay

1956 Chevy 210 Sedan
1970 Camaro Z-28/RS
1970 Chevelle SS 396 (numbers matching L34 car)
1971 Chevy SWB Fleetside with 1967 front clip - in progress
My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=438156
Mieser3 is offline   Reply With Quote
Old 12-29-2011, 10:54 PM   #2
edhtrd71
Registered User
 
Join Date: Jan 2011
Location: Edinburg, Texas.
Posts: 194
Re: Which Master Cylinder Bore Size?

I think the stock size is 1 1/16. I wish I could help recomend which one. You could call wilwood. 1 inch will give more pressure less volume, 1 1/8 will give more volume less pressure. I hope someone chimes in, im interested to know which aluminum master will work well also.
edhtrd71 is offline   Reply With Quote
Old 12-29-2011, 10:57 PM   #3
lolife99
67-72 parts collector,…
 
lolife99's Avatar
 
Join Date: Nov 2002
Location: Mid-MO
Posts: 22,700
Re: Which Master Cylinder Bore Size?

I'm going to use the 1" bore without a booster on my stepside.
3/16" brake lines also.
__________________
Keith

Convert to disc brakes.
http://67-72chevytrucks.com/vboard/s...d.php?t=444823
lolife99 is offline   Reply With Quote
Old 12-29-2011, 11:04 PM   #4
Mieser3
Registered User
 
Mieser3's Avatar
 
Join Date: Sep 2010
Location: KS
Posts: 348
Re: Which Master Cylinder Bore Size?

I forgot to mention that I'll also be running an 8" dual diaphragm booster as well.

Interested to see what is recommended......
__________________
Jay

1956 Chevy 210 Sedan
1970 Camaro Z-28/RS
1970 Chevelle SS 396 (numbers matching L34 car)
1971 Chevy SWB Fleetside with 1967 front clip - in progress
My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=438156
Mieser3 is offline   Reply With Quote
Old 12-29-2011, 11:24 PM   #5
kpeztruck
Registered User
 
kpeztruck's Avatar
 
Join Date: Sep 2010
Location: Canton, GA
Posts: 229
Re: Which Master Cylinder Bore Size?

I highly recommend calling the tech dept at Wilwood. That is what I did years ago on my build, and they pointed me in the right direction. Paul
kpeztruck is offline   Reply With Quote
Old 12-30-2011, 01:29 PM   #6
Mieser3
Registered User
 
Mieser3's Avatar
 
Join Date: Sep 2010
Location: KS
Posts: 348
Re: Which Master Cylinder Bore Size?

I spoke to the tech dept. at Wilwood and they told me to use the 1 1/8" bore for my setup. Just thought you guys might be interested in their recommendation.
__________________
Jay

1956 Chevy 210 Sedan
1970 Camaro Z-28/RS
1970 Chevelle SS 396 (numbers matching L34 car)
1971 Chevy SWB Fleetside with 1967 front clip - in progress
My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=438156
Mieser3 is offline   Reply With Quote
Old 03-07-2012, 10:10 PM   #7
RdoubleU
Registered User
 
RdoubleU's Avatar
 
Join Date: Apr 2010
Location: AL
Posts: 209
Re: Which Master Cylinder Bore Size?

Quote:
Originally Posted by lolife99 View Post
I'm going to use the 1" bore without a booster on my stepside.
3/16" brake lines also.
Quote:
Originally Posted by Mieser3 View Post
I spoke to the tech dept. at Wilwood and they told me to use the 1 1/8" bore for my setup. Just thought you guys might be interested in their recommendation.
Jay / Keith - can you give any detail into what you had to do with the brake pedal pushrod with these MC?

Wilwood stated the 7/8 MC came with a new pushrod but the 1 and 1 1/8" bores did not.

Does the factory pushrod work with no issues?
RdoubleU is offline   Reply With Quote
Old 03-07-2012, 10:45 PM   #8
lolife99
67-72 parts collector,…
 
lolife99's Avatar
 
Join Date: Nov 2002
Location: Mid-MO
Posts: 22,700
Re: Which Master Cylinder Bore Size?

Quote:
Originally Posted by RdoubleU View Post
Jay / Keith - can you give any detail into what you had to do with the brake pedal pushrod with these MC?

Wilwood stated the 7/8 MC came with a new pushrod but the 1 and 1 1/8" bores did not.

Does the factory pushrod work with no issues?
My master cylinder push rod worked fine.
You want between 1/8" and 1/4" freeplay in the pedal pushrod.
__________________
Keith

Convert to disc brakes.
http://67-72chevytrucks.com/vboard/s...d.php?t=444823
lolife99 is offline   Reply With Quote
Old 12-30-2011, 01:34 PM   #9
Scottshotrods
Registered User
 
Join Date: Oct 2008
Location: oxnard ca
Posts: 2,201
Re: Which Master Cylinder Bore Size?

1 1/8 bore is what we have been useing on wilwood master and this is with out a booster and it works great with wilwood d52 this way.

So you know we have these instock and have some great prices on them !!!

Justin
Scottshotrods is offline   Reply With Quote
Old 03-07-2012, 10:54 PM   #10
RdoubleU
Registered User
 
RdoubleU's Avatar
 
Join Date: Apr 2010
Location: AL
Posts: 209
Re: Which Master Cylinder Bore Size?

Thanks Keith, I'm going with the 1" manual setup as well so Good to know it worked for you
RdoubleU is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 08:15 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com