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  #1 (permalink)  
Old 04-12-2011, 10:49 AM
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Default Brake Upgrade

Does it make a big difference switching from a single piston caliper to a multi piston caliper?
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Old 04-13-2011, 09:00 AM
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Hey Jams,

Yes you can see a big improvement, it really depends on what you’re switching from and too.
Going from a single piston GM or Must II sliding caliper, to a 4 or 6 piston aftermarket caliper will gain a lot of heat absorbing/shedding capability. That will make your brakes less likely to fade. Also the calipers tend to be more rigid so the pedal feel is better. Pad changes are easier and depending on the caliper can have more pad area and even be lighter.
They also allow the use of a larger rotor, which can also be an advantage if your seeing overheating issues with your current parts.
A couple of questions:
What do you have?
Why are you unhappy with your current brakes?
What are you thinking of doing?
Below is my current revision. I’m working on a one piece hub/hat/knock off deal now.

Jason


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Old 04-13-2011, 02:49 PM
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Thanks for the reply. Nice pics. When I get idle time, I tend to think about cobra upgrades.

I just have the basic Mustang II brakes. I don't do any racing so I don't think I have to worry or see many of the benefits you mentioned.

Since I can't fit a booster (like most/all of us), I was wondering if I would really feel a difference with lets say a wilwood upgrade?

As far as I know the brake booster kits are very expensive, since we can't fit a traditional booster.
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Old 04-13-2011, 04:07 PM
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Quote:
Originally Posted by jams View Post
Thanks for the reply. Nice pics. When I get idle time, I tend to think about cobra upgrades.

I just have the basic Mustang II brakes. I don't do any racing so I don't think I have to worry or see many of the benefits you mentioned.

Since I can't fit a booster (like most/all of us), I was wondering if I would really feel a difference with lets say a wilwood upgrade?

As far as I know the brake booster kits are very expensive, since we can't fit a traditional booster.
i went from the must II caliper to the wilwood 4 piston, i upgraded the rotor too from 9" to 11", and it made a huge difference. i actually can bounce my nose off the steering wheel if i brake too hard.....lol
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Old 04-13-2011, 04:47 PM
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Now that is a good recommendation, although I would hate to break my nose.
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Old 04-13-2011, 06:05 PM
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[quote=D-CEL;1122523]Hey Jams,

''Pad changes are easier''

Jason


The more pistons you have to deal with, the difficulty will rise when replacing pads, but working on disk brakes is a cake walk.
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Old 04-13-2011, 08:38 PM
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Nice brakes jason. Looks like what I want for my cammer car. I'm trying to find a set up with the largest diameter rotors that will fit inside a 16 inch Halibrand wheel with six pin drive and utilizing early Jag front suspencion. Any thoughts?
Mark
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Old 04-14-2011, 08:41 AM
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Jams,

Remember it depends on what you have now. If your current Must II set up is all stock (meaning Organic pads, rubber hoses etc.) you we see a very noticeable difference switching to 4 piston set-up. Even the smaller Wilwood Dynalite calipers will perform substantially better. If you have upgraded your pads and lines (all part of what you feel) they will still be better, just less dramatic.
A side note: If you’re not racing, stay away from hard, racy pad compounds. I hear a lot of “fast” street guys saying “Yea, I run the full XYZ racing pads, cuz they are so much better!!” In truth, they are not better just designed to work at higher temps. When run on the street they rarely (if ever) see enough temp. to offer acceptable cold stopping performance.
Cobras and Brake Boosters: You can run one, Superformance comes with power brakes (I removed mine and built the mount you see in the photo), lots of guys fit a small (8”) booster.
I feel there are many reasons that Cobras in general should not have power brakes.
1. They are light cars. You just don’t need it the power advantage. If the master cylinder size and pedal ratio are correct, a manual system will work amazingly.
2. Extra cost, complexity, packaging, space issues and weight.
3. A lot of Cobra guys run big cams with lots of overlap. This results in a very weak vacuum signal. With little vacuum the booster becomes detrimental in the system requiring more pedal pressure and sluggish response.
In the end, Its just not necessary.

FWB is right on the money, you can get a Wilwood 11” Dynalite kit front kit for under $700 from summit. Just make sure to check your wheel clearance.

Akfish,
I disagree, because the pads come out and go in through the top it is many times simpler than a sliding caliper, even with multi piston deals. I use a 2” wide flat pry bar. The pistons always retract just enough to get the blade in-between the rotor and the old pad and gently work the pistons back in, takes about 20 seconds.

Mark,
Thanks. That is a 12.75x1.25 rotor with a narrow body SL6R and it fits inside a 15” Trigo without any issues. I can’t see any reason to go bigger.
As far as a straight bolt on deal, I don’t know of an aftermarket kit for the 6 pin Jag stuff. ERA has a big brake (12.2”) kit for the 6 pin, but I don’t know if it’s the Jag spindle. If you post or email me a picture of what you have, Id be happy to help.

jasonw@metalstec.com

Jason
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Old 04-14-2011, 01:44 PM
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while i can't speak for summit......i upgraded the suspension and the brakes at the same time.

i had stamped steel factory mustang upper and lower control arms with standard coil spring and shocks, bear in mind my car was built in 1979. in 2006 the BJ's and bushings were done, so i went with a Heidt's suspension upgrade, tubular uppers and lowers with QA1 coil overs, i bought the wilwood upgrade from them which included the 11 inch granada type hub\rotor and dynalite calipers. by buying both packages together, i think, i saved some dough. i can't recall what the brakdown was but the wilwood upgrade is available from a variety of sources so shop around for the best deal.
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Old 04-14-2011, 04:20 PM
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I switched my 9" Mustang II to the 11" Wilwood Dynalite 4 piston and I can tell you they work better, feel better, look way better and weigh in 12 pounds lighter per wheel. The 9" brakes worked but these new brakes give me more confidence. I still have drums in the rear...for now.

Jason are those left hand threaded bolts on your hub/disc? Just noticed the saftey wire is backwards if it's a right hand thread.

John
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