Which master cylinder dia?

tolaas · 09-30-2021, 04:26 PM

Hello, have a camaro 67 with stock rear brakes and mark wiliams front brakes, two piston calipers and i wonder which size on master cylinder.

Thank`s

Tom Goldman · 09-30-2021, 08:23 PM

I usually use a 1 1/32" master cylinder with that particular combination with a 6 to 1 pedal ratio.
Gives the best balance between pedal effort vs. pressure

FireSale · 10-01-2021, 02:26 AM

There's a lot that goes into proper brake pressure and most of it's math. Here is a good article from Joe's Racing that explains how to determine caliper area and pressure with different bore masters. I have a 68 Mustang and use a master from an 85 Fox body called a step bore or fast fill master. It has two piston diameters and gives manual foot pedal feel with power brake stopping power. Difficult to bleed.

https://www.joesracing.com/master-cylinder-math/

Dave1695 · 10-01-2021, 09:00 AM

I use a 1 inch bore Corvette master cylinder on my 67 Camaro Stock Eliminator car. 4 piston calipers on front and rear, no proportioning valve. Used same master when it was drum brake rear, pedal was a littler firmer but still held car on line and stopped fine at top end. BTW my car weights just under 3100 lbs.

tolaas · 10-01-2021, 05:47 PM

Thank`s for your input!

09-30-2021, 04:26 PM	#1
tolaas Junior Member Join Date: Oct 2020 Posts: 29 Likes: 0 Liked 0 Times in 0 Posts	Which master cylinder dia? Hello, have a camaro 67 with stock rear brakes and mark wiliams front brakes, two piston calipers and i wonder which size on master cylinder. Thank`s

09-30-2021, 08:23 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,438 Likes: 787 Liked 703 Times in 206 Posts	Re: Which master cylinder dia? I usually use a 1 1/32" master cylinder with that particular combination with a 6 to 1 pedal ratio. Gives the best balance between pedal effort vs. pressure __________________ Tom Goldman 1500 SG , 1506 STK

10-01-2021, 02:26 AM	#3
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 127 Posts	Re: Which master cylinder dia? There's a lot that goes into proper brake pressure and most of it's math. Here is a good article from Joe's Racing that explains how to determine caliper area and pressure with different bore masters. I have a 68 Mustang and use a master from an 85 Fox body called a step bore or fast fill master. It has two piston diameters and gives manual foot pedal feel with power brake stopping power. Difficult to bleed. https://www.joesracing.com/master-cylinder-math/ __________________ Dale Shearon 68 Mustang 6394

10-01-2021, 09:00 AM	#4
Dave1695 Member Join Date: May 2009 Posts: 160 Likes: 0 Liked 15 Times in 11 Posts	Re: Which master cylinder dia? I use a 1 inch bore Corvette master cylinder on my 67 Camaro Stock Eliminator car. 4 piston calipers on front and rear, no proportioning valve. Used same master when it was drum brake rear, pedal was a littler firmer but still held car on line and stopped fine at top end. BTW my car weights just under 3100 lbs.

10-01-2021, 05:47 PM	#5
tolaas Junior Member Join Date: Oct 2020 Posts: 29 Likes: 0 Liked 0 Times in 0 Posts	Re: Which master cylinder dia? Thank`s for your input!