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-   -   Chevy Al 1 1/16" bore (https://classracer.com/classforum/showthread.php?t=71747)

Ed McLawhorn Jr. 12-16-2018 10:31 PM
Chevy Al 1 1/16" bore
 
Installing disc on front of 66 Chevy2 with drums on rear. Brake tech stated I needed 1 1/16" mc bore and 10lb residue valve for rears. I seem to remember there was a Chevy Al mc with 1 1/16" bore, but can't remember all details. Hoping someone can help my memory out. Thanks.

Ed
SS2266

ss3011 12-17-2018 01:35 AM
Re: Chevy Al 1 1/16" bore
 
I got one from a early 80's S-10 pickup It had a flatter plastic tank on top .

Hacksaw 12-17-2018 11:50 AM
Re: Chevy Al 1 1/16" bore
 
Don't think anyone made an aluminium master cylinder that looks "stockish". I'm going to try a stock master from a 69 Nova on my Chevy II with the distribution block and prop. valve attached on the brackets that bolt to the mounting of the master. Won't know how it works out till next summer.

Dave1695 12-17-2018 02:05 PM
Re: Chevy Al 1 1/16" bore
 
Ed, is this a drag race car and is the MC mounted in stock location?

Eman 12-17-2018 03:58 PM
Re: Chevy Al 1 1/16" bore
 
Is this for a manual brake set up? For an aluminum GM master cylinder I'd look at an S-10 with manual brakes. I've used a GM MC from an early 80's fullsize pickup before but they are cast iron. Most GM aluminum master cylinders were made for power assist and the problem with them is they are made to mount at an angle, the resevoir is the problem.
I wouldn't worry about a residual ck valve unless the MC is lower than the brakes.

Greg Barsamian 12-17-2018 08:43 PM
Re: Chevy Al 1 1/16" bore
 
NAPA part number M2456, This might be a bolt in for what you are doing

Bill Bogues 12-17-2018 08:51 PM
Re: Chevy Al 1 1/16" bore
 
The s-10 one is the way to go. bolts right up, is level and has enough volume to work with disc brake setup.

Ed McLawhorn Jr. 12-17-2018 11:48 PM
Re: Chevy Al 1 1/16" bore
 
Quote:
Originally Posted by Dave1695 (Post 578613)
Ed, is this a drag race car and is the MC mounted in stock location?
Yes, this is a full drag car and yes the MC is mounted in the stock location.

Todd Hoven 12-18-2018 07:31 AM
Re: Chevy Al 1 1/16" bore
 
Quote:
Originally Posted by Eman (Post 578619)
Is this for a manual brake set up? For an aluminum GM master cylinder I'd look at an S-10 with manual brakes. I've used a GM MC from an early 80's fullsize pickup before but they are cast iron. Most GM aluminum master cylinders were made for power assist and the problem with them is they are made to mount at an angle, the resevoir is the problem.
I wouldn't worry about a residual ck valve unless the MC is lower than the brakes.
If you don't run the residual valve you wont have a good pedal and the rear drum brakes won't apply with the correct bias. I'd go with the Strange master that has ports set up for 3/16 brake lines. i think its 1" 1/8. That's what I installed on my Firebird and it works and fits great.

Ed McLawhorn Jr. 12-18-2018 10:04 AM
Re: Chevy Al 1 1/16" bore
 
Quote:
Originally Posted by Todd Hoven (Post 578654)
If you don't run the residual valve you wont have a good pedal and the rear drum brakes won't apply with the correct bias. I'd go with the Strange master that has ports set up for 3/16 brake lines. i think its 1" 1/8. That's what I installed on my Firebird and it works and fits great.
Thanks Todd. I can use the 1 1/8" MC. The strange looks like the ticket and priced very reasonable.


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