Brake upgrade idea

I have been thinking about upgrading the brakes on my CJ5. The current stock under floor master cylinder has drained dry. It has been sitting for a couple years since I've driven it. But, today I managed to get the top off and look down the dry master cylinder. I put my finger in there, and got a sludge of dirty brake fluid on me. It looked like rust ? Well, I've been wanting to go with a firewall mounted master cylinder and hanging pedal to match my hydrualic clutch setup.

After some researching, I have came up with a plan with parts and a system. I do not have everything figured out, and not sure if I'm missing anything. I want to go with Wilwood's high volume master cylinder: http://www.wilwood.com/Products/006-MasterCylinders/003-HVAMC/index.asp

Wilwood hanging pedal: http://www.wilwood.com/Products/005-PedalAssemblies/002-FSMP/clutch/index.asp

Two 10 pound RPV's: http://www.wilwood.com/Products/006-MasterCylinders/010-RPV/index.asp

I have quickly drew up a diagram in paint to show you guys what I'm thinking of doing: http://bonehead.transamrit.net/cj5/cj5brakes.JPG

I dont know what size bore master cylinder to go with.. they have 3 diffrent sizes. Will this master cylinder work good If I ever upgrade to disc brakes ? But for now, I plan on staying with the stock drum brakes.

 

If your upgrading the brakes why would you want to stay with a single output MC? If it was me I would go with there pedal for dual MC's. http://www.wilwood.com/Products/005-PedalAssemblies/002-FSMP/fsmdmcbp/index.asp
It mounts 2 single MC's and has a balance bar setup so you can adjust front to rear brake pressure. And get the longest pedal that can fit in your jeep to increase brake pedal pressure.
Keith

 

You might also want to check out their dual pedal setup with the triple master cylinders, it gives you redundancy on your front and rear brakes and more ability to fine tune your front to rear bias. I have the dual pedals from wilwood and they are easy to mount on the firewall.

 

Well, I have removed the heater core unit from its stock location on my CJ5. This allows me to have plenty of space to mount any master cylinders and pedals on the firewall. I have bolted a 1/8" steel plate at that location to make it a good sturdy mounting area. I could take a picture and show you what I have done. I did this to upgrade to a hydraulic clutch. I took the heater core unit and mounted it under the dash on the right hand side.

Glen: That is what I am trying to figure out.. I'm guessing wheel cylinders require less volume than calipers correct ? Where a bigger bore master cylinder would apply the brake fluid though quicker.. making my brake pedal more touchy. But, also do wheel cylinders need more or less PSI to do its job ?

junkfood: My thoughts with only using a single ouput MC, and only 1 of them is that.. it'd be appropriate for my CJ5. As, it would do its job. What is the reason for going with tandem MC's ? tuneability, reliability ? My understanding is that the wheel cylinder size acts as proportional valves in the system. This is where the tuning is done, so my stock drum brakes are already tuned. But, in a disc brake upgrade, I can see where you would want to tune the front rear brake pressure ratio. For reliability, if a brake circuit was broken, the other would still function and stop your jeep.. but isn’t that what the emergency brake is for ? With one MC I could stop, and plug up the broke circuit on the MC and the other circuit will function again. Also, the cost of the upgrade will be less. I will look into the cost.. perhaps I could run one MC and then add another one in the future if I ever upgrade to disc brakes.

OrangeCJ5: I have already installed one wilwood pedal for the clutch, so I only need one more. So, if someone were to upgrade everything at once, a triple MC with 2 pedal setup might be the easiest way to go. Also, With the single pedals.. I have the ability to place where I want the pedal at. Are both of your pedals on the left of the steering column ?

 

Boyink: I see your point.. I went out and looked at the Jeep. It looks like it'll be a tight fit if it works. I have installed a GM steering column, but I want to install the stock one back it, for more room. I guess I'll have to see if it'll work by pre fitting the pedal I have now. I may have to move the stock steering column to the left a little bit to get it to work. I dont want to hang the pedal to the left of the column, I think the brake pedal should be near the gas pedal. I have also already converted my gas pedal to a cable type.. I got my assembly of of a 78 chevy pick up or some year around then. I have taken some pics to show what I have now:

http://bonehead.transamrit.net/cj5/pedal 005.jpg
http://bonehead.transamrit.net/cj5/pedal 006.jpg
http://bonehead.transamrit.net/cj5/pedal 008.jpg
http://bonehead.transamrit.net/cj5/pedal 010.jpg

 

Don't have any pics right now and won't be back to the jeep til next weekend, but I will try to snap some pics of the willwood setup on the '6 and pics of the floor/pedals. Both pedals ended up on the left of the column and are close together. Just makes it easier to 2 foot the brake and clutch.

 

I am not by my Jeep either until Saturday. I will try to get some pics then.

Both pedals are to the left of the steering column and I still use the stock gas pedal. I also have had my stock heater removed and one placed under the dash so there was tons of room to line up the pedals and get them just where I wanted them.

As for the second pedal question, I am not sure, I bought these pedals: http://www.wilwood.com/Products/005-PedalAssemblies/002-FSMP/dual/index.asp

I called Wilwood and they recommend 1" for the brakes and 7/8" for the clutch so that's what I went with. I will for sure get you guys some pics.

Mike