Master Cylinder Size Help

[jeffandre]

I am trying to finish up my brake system but need help getting the right size MC. After careful consideration I have determined that installing custom pedals with attached MC's (like Tilton or AP products) will be way too much work than it's worth (would take me over 100 hours of tweaking to get it right, maybe more). I am considering a replacement MC for my 71 Camaro. I will have a better weight distribution than stock. Here's my caliper specs:

Front: AP Racing 6-piston, 27/32/38 piston sizes, 14-inch rotors.
Rear: C5 front 2-piston, 44.5/44.5 piston sizes, 13-inch rotors.

For manual brakes, what sizes bore MC should I try? I have heard 15/16" in some apps, but my rears are larger compared to my fronts than those apps, so should I go to 7/8"? Or do I have this backwards? Thanks for your help,

[70 LS1]

Tilton has a form you fill out on their website. One of their brake engineers will respond within a day and tell you exactly which masters to use.

[SHANE 73Z]

Jeff,

You can still run a bias bar arrangement in your car. CNC Brakes has a setup that adapts to the stock pedal. This is what I am currently running in my car. Even though it is not listed there is a GM application.

http://cncbrakes.com/cncbrakes.com-a...=240&subseries

Just keep in mind that the stock 2nd gen pedal ratio isnt as good as the ideal 6:1, so you may want to go a little smaller to reduce effort. With my C4 sized calipers, I am currently running .70" MCs.

Shane

[jeffandre]

I will complete the Tilton form now and see what they say. I will also call CNC to see if they can fill my needs. I really want a balance bar assembly but did not want to go through the trouble of hacking up my car to force one in there, and the CNC product looks like it will handle the job very well. Thanks again!

Where should I go to look for quality pedal pads? Looks are not important, feel and the need to have positive foot holding during high stress maneuvers is.

[70 LS1]

You can also call and talk to an engineer at Tilton. Great customer service. I probably spent half an hour talking brake theory about a month ago.

[boodlefoof]

Jeff,

A good place to find pedals is at Coleman Racing (www.colemanracing.com). They actually sell a very reasonably priced 2-pedal hanging, reverse-MC-mount, assembly that comes with two 3/4'' MCs and one 1'' Tilton MC. Not sure if those sizes would be best for you... but it looks like a good buy at $300.

[jeffandre]

0.75 for the front, 1.125 for the rear. I am leaning towards the CNC unit for ease of installation, which saves me time and money. I will call them Monday to find out what the cost will be for the MC, the bias adjuster, and anything else I might need. Thanks again for helping me out with suggestions/ideas, this site rocks!

[F70t/a]

Badass jeff, Glad to hear the camaro is coming along!!!

[jeffandre]

Badass jeff, Glad to hear the camaro is coming along!!!

Dave,
At this rate, I will be the only one on this site with a project car as all of you will finish yours well ahead of me. Oh well, it's the trip, not the destination that makes it all worth it. Hope all is well with you, we should get together again soon. See of you can make it to the Nor Cal get together that Keith is trying to put together later this month.

[F70t/a]

lol, I think your camaro will be done way before the bird even rolls. Let me know what date you guys are meeting up. Hopefully I will have time off from work.