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Frame/Suspension/Brake... Talk & Q&A All things... Frame/Suspension/Brake

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Old 11-01-2021, 07:14 PM
da_bull da_bull is offline
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Default Master Cylinder question for the masses...

I have built a frame using 2x3x3/16 tubing. I am at that point where I am trying to decide what kind of master cylinder to use and where to put it. Throughout the build, I was just thinking simple under the car, pedal arm all inclusive, frame mounted one like my 32 Ford had. My issue is that style is about 5.5"-6" tall. With the 3" frame (sitting on the ground with bags), 5/8" urethane CJ body mounts, 1" floor tubing and 1/2" plywood for the floor, only nets me 5-1/8" and I really dont want to have the master cylinder that close to the ground when the bags are deflated. So if I raise it up 1", I only have 4". That will basically put a ~2" bump in the floor. Not doing a booster. Any other ideas? Remote reservoir? Shorter cylinder? VERY small firewall mounted? Thanks in advance guys!
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Old 11-01-2021, 07:44 PM
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DozerII DozerII is offline
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How about one of those 90 degree units that goes inside the firewall under the dash
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Old 11-01-2021, 07:47 PM
da_bull da_bull is offline
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Quote:
Originally Posted by DozerII View Post
How about one of those 90 degree units that goes inside the firewall under the dash
I've seen those. I could do that, but I'd have to remove the bottom of cowl gas tank. Can you get to the reservoir on those?
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Old 11-01-2021, 08:48 PM
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Bamamav Bamamav is offline
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If you go with a remote reservoir you will still have the lines coming in the top, but with a 90* it could work.

Another idea is put the master cylinder farther to the back, and use a long pushrod.
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Old 11-01-2021, 08:57 PM
da_bull da_bull is offline
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Quote:
Originally Posted by Bamamav View Post
If you go with a remote reservoir you will still have the lines coming in the top, but with a 90* it could work.

Another idea is put the master cylinder farther to the back, and use a long pushrod.
I'd though about doing the longer rod and putting it under my seat (wouldnt care about the bump there. Can you do that safely? Curious about flex in the rod. My pea-brain says maybe like a tie rod/panhard bar with clevis'd end and just a short section of the push rod at the cylinder.
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Old 11-02-2021, 04:17 AM
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Quote:
Originally Posted by da_bull View Post
I've seen those. I could do that, but I'd have to remove the bottom of cowl gas tank. Can you get to the reservoir on those?
I'm thinking that may be a pain.
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Old 11-02-2021, 06:10 AM
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You can safely run a long rod as long as you have support brackets along the way with a hole in each one to run the rod through to keep the rod from flexing.
The diameter of the rod and how hard the material is, is what determines how many brackets you will need.
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