patrick hubbard
SHO Member
Has any one done a brembo 4 piston brakes from a cobra r conversion
Cobra r brembo brakes
- Thread starter patrick hubbard
- Start date
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luigisho
SHO Member
I don't recall seeing any on a GenIII. I've seen 4 piston wilwoods on a GenI/II so it's doable.
patrick hubbard
SHO Member
I was thinking if the cobra brakes fit than the cobra r brembo should too
gamefanatic
SHO Member
Patrick. You are correct. The mount holes will be the same, but line connections may the problem, I think the Brembo uses a different end. Distance may also be a problem. The Cobra front lines are about 18". Ours are about 24".
At any rate worst thing to consider is having to have a custom line made up.
I haven't looked at the dimensions, but I've always thought the Brembos were a bit wider, but that may just depend on the model.
At any rate worst thing to consider is having to have a custom line made up.
I haven't looked at the dimensions, but I've always thought the Brembos were a bit wider, but that may just depend on the model.
patrick hubbard
SHO Member
Making the lines are not an problem o rieleis makes hoses
gamefanatic
SHO Member
These are Baer. Might be wrong about them being wider.
luigisho
SHO Member
I should have said it is doable with enough spacing/wheel size. The larger brake kits to include wilwood and TCE kits that I have seen were under 17" or larger wheels. I see Todd went from SHO motor to Honda for his hill climb car this year.
gamefanatic
SHO Member
Good point. Cobra/Mach I kits do require 17" rims. At which point you should look at getting a wider setup to match the extra stopping power. Without ABS the stock brakes can over run the stock size. Ask me how I know... 
There is an extra consideration when upgrading your rims to 17" to accommodate the larger Cobra R brake discs. That is this...when you get a flat, if it is the front tire, you will need to change TWO tires, because the stock donut will NOT fit the front larger brakes. I've always wondered what Cobra owners did when they got a flat, but never having owned a Cobra or 'Stang, I claim ignorance.Good point. Cobra/Mach I kits do require 17" rims. At which point you should look at getting a wider setup to match the extra stopping power. Without ABS the stock brakes can over run the stock size. Ask me how I know...
So, get a front flat, jack the car up, swap out your good (non-flat) rear rim/tire from the rear, then mount the donut spare on the rear. This happened to JohntheSHOguy who was tempting me with the Cobra R upgrade, but I kinda balked at finding a larger rim/tire combo that looked good like the stock 5-star, and the spare issue.
gamefanatic
SHO Member
PAid up AAA road side service!
When you went to 17" rims, did you consider the 17" rims that are also Ford OEM rims of later models, like the Focus? I think the later models, with the Titanium trim level were running 17" OEM wheels with the same bolt pattern. Only thing I'm not certain about is if the offset is w/in what we can use without a spacer.Good point. Cobra/Mach I kits do require 17" rims. At which point you should look at getting a wider setup to match the extra stopping power. Without ABS the stock brakes can over run the stock size. Ask me how I know...
You are supposed to do this regardless. Mini/donut spares are not supposed to be mounted on a drive axle. It can damage the differential. The donut spare always goes in the rear on a FWD car.
-Chad
gamefanatic
SHO Member
True. While he should get an appropriate sized spare, you could just swap the good tire from the rear to the front and put the spare on the rear. They won't have the oversized brakes.
This all assumes the overall diameter of the new tire is different from the spare (very likely).
I used my spare on the front after 26 years of sitting in the trunk only to go 1 mile to get it swapped to the new tire. While it looked brand new, I was more worried it might have structural issues for anything more. But normally I just get a tow or take the rim to get the tire on.
When upgrading to Cobra brakes, has anybody ever used these brake bias plugs from SHO source?
This is what the product description says:
"SHOs use a bias valve mounted to the rear control arms. This bias valve constantly adjusts the front to rear braking proportion based on the position of the suspension (eg. as the car compresses in the front and the rear lifts, more braking force is directed to the front rotors). This worked very well with the stock factory setup, but many things can adversely affect the bias valve performance.
1) If the car is lowered, it changes the geometry of the bias valve.
2) If the bias valve is rusted, broken or stuck, it will not work correctly.
3) If the size of the rotors on the front or rear have been altered, the bias balance will not be correct.
Bias plugs delete the function of the bias valve and give you constant front/rear braking force to help resolve the three issues above."
This is what the product description says:
"SHOs use a bias valve mounted to the rear control arms. This bias valve constantly adjusts the front to rear braking proportion based on the position of the suspension (eg. as the car compresses in the front and the rear lifts, more braking force is directed to the front rotors). This worked very well with the stock factory setup, but many things can adversely affect the bias valve performance.
1) If the car is lowered, it changes the geometry of the bias valve.
2) If the bias valve is rusted, broken or stuck, it will not work correctly.
3) If the size of the rotors on the front or rear have been altered, the bias balance will not be correct.
Bias plugs delete the function of the bias valve and give you constant front/rear braking force to help resolve the three issues above."
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Texas Marauder
SHO Member
As long as your ABS works, they work great. The ABS will control rear lock up. If your ABS malfunctions you may have too much rear braking.
So if I understand what you are saying, if I upgrade to larger Cobra discs in front, without using these plugs, the rear discs should just operate normally, assuming ABS module is operating correctly?
Texas Marauder
SHO Member
Basically, yes. Your brakes will work normally. The proportioning valve is used to reduce pressure to the rear brakes in a hard stop where the rear end rises, to prevent rear lock up and skidding. As long as your ABS works the proportioning valve is redundant. A bit of overkill however, it still reduces pressure to the rear brakes. The bias plugs gut the proportioning valve to allow full flow to the rear all the time. In that case, without functioning ABS, you may have rear brake lock up when you least expect it.
I get random ABS amber lamp lighting up then self-extinguishing a LOT. The car doesn't seem to drive any differently when the ABS light is on. I haven't looked into it, but I'm thinking it may be some crud in the ring of teeth or a possible intermittent sensor wire. Also my cruise control doesn't work anymore and I'm thinking it may be somewhat related to the ABS issue.
gamefanatic
SHO Member
I just strapped my portioning valve in the fully compressed. Without ABS your Cobra with match 13" front brakes can be too much for the car without a matching rubber compound. Definitely recommend the ABS to be working with the upgrade if using on public roads.
89s didn't even have ABS and there are plenty out there running Cobra brakes and bias plugs for decades. Plenty 89s that get tracked on a regular basis running Cobras with heavy track compounds in the front. It's not a big deal. My 89 has had bias plugs since I bought it.
-Chad
-Chad
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