Skip to main content ↑ ↓
Topic: rear brake lines (Read 3055 times) previous topic - next topic

rear brake lines

cool cats says use 14" of 1/4" line and 3' of 3/16" line to do the turbo coupe 8.8 swap. would this still apply to the cobra rear brakes even if useing the cobra MC?

Re: rear brake lines

Reply #1 –
i forgot to mension... im redoing the brake lines on the back all together, new hoses, new splitter ect...

i was thinking of useing about 3' or so on each side of 1/4" with a new T-junction but i need to know what kind to use that will bolt up to the rear center brake hose.

Re: rear brake lines

Reply #2 –
Yeah, I found out that there are different configurations for each car style. The TC got really big brake lines (I think 3/16" or 1/4", can't remember) and the junction is on the passenger side. The 1983-86 got smaller lines and the junction is on the driver's side. I believe 1987-88 non-turbo cars got the smaller line with junction on the driver's side.

Anyhow, to answer your question, if you're redoing things then you'll figure it out. But I believe you need at least one adapter somewhere, either at the caliper or at the junction. The problem becomes that one fitting is larger than the others. What I did was replumbed the whole rear end, and ran the smaller line to both sides, then put the adapter on the junction. I figured having the same size brake line was the most important thing (like, why would I need more fluid flow to one side as opposed to the other). At the time I wasn't very skilled at cutting and flaring brake line, so I went with adapters. If you're making your own lines from scratch you'd just need to put a larger threaded end on the smaller line, and that would solve your problem too.

Re: rear brake lines

Reply #3 –
I believe I read on Coolcats that you need to get an adjustable proportioning valve to get the balance right for cars that didn't have discs in the back originally. When I finally get around to running lines for mine, I will be replacing all the lines on the whole car. Instead of having another valve hanging around under my hood, I'd prefer to just get one for a TC.
 
Does anyone know what the part number is? Also, will the valve be compatible with the master cylinder in my 87 XR7 w/drum rear.

Re: rear brake lines

Reply #4 –
i have a flex line from a F 150 and big lines.
I have F150 master for all wheel disks and so far it works fine

Re: rear brake lines

Reply #5 –
OK, if you don't want to manually set the front/rear bias, I've been told (and it's also been mentioned here) that you can use a stock prop valve from an older Lincoln Versailles. Those cars had 4-wheel discs and the prop valve is obviously set up for them. I would highly recommend avoiding the stock Turbo Coupe prop valve for many reasons (ABS, 2 different types, etc.). Tom will back me up on this. You need one from a car that never had ABS or all of its plumbing, and that's simple and basic, and the Versailles definitely provides that.

Far as the master cylinder, some people have luck with the stock aluminum one (1987-88), some don't. I think it depends on the shape of all of your brake lines and components elsewhere in the car. It's one of those things where you figure it out once the TC rear is installed, then go from there.

Re: rear brake lines

Reply #6 –
As far as rear brakes, the Lincoln Mark 7's "Center" brake hose has a splitter built into it.  Two 3/16's (with many adapters) can be hooked into it, with the source being the stock 1/4".
Willpower is no match for Horsepower.