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View Full Version : 13" Cobra brake project back on track



sbca96
05-26-2006, 09:08 PM
Well, I finally got my tax refund, and I sold a 97 Camaro axle I have had
in the garage for a few years, so I made the order last night. Hopefully
they will be here next week sometime. This is what I got for $626 bucks
including tax/shipping:

I decided to go with the all aluminum Mach 1 calipers, they are identical to
the Cobra, but have no markings (price includes pads). Set : $179

http://www.stangsuspension.com/store/catalog/mach1calipers.jpg

Since I am giving the whole GT front setup to my dad, I needed two new
brake lines, these are as cheap as stock rubber. They are stainless steel
braided hoses with teflon inners, and have the correct bolts. Set : $60

http://www.stangsuspension.com/store/catalog/ssbrakelines.jpg

For use with the "Cobra" calipers, I needed 13" rotors, I decided to get the
most impressive looking, so there would be no doubt that these are some
awesome brakes. Here is the latest technology/style, zinc plated & cross
drilled with slots. The zinc plating keeps the surfaces that the pads do not
touch from getting all rusty looking. Set : $170

http://www.stangsuspension.com/store/catalog/cobracdslfrontz.jpg

The reason I got this GT brake setup for free was that the rotors were a
bit scored, which includes the rear rotors. Wanted rotors that matched on
the rear, I went with the same design/style rear rotors (zinc). Set : $125

http://www.stangsuspension.com/store/catalog/cobracdslrearz.jpg

Plan is to go out to a rarely used stretch of road this weekend & mark off
a section for some 60-0 stops with the GT setup before I upgrade. That
will give me some numbers I can post. I dont expect it to be much, if any,
better then the factory setup when it was new, if memory serves an Avanti
stopped in 139 feet from 60 back in 63?? Anyone have those results? The
main improvement the GT brakes would have is repeatability. Not sure
what to expect from the Cobra brakes, I figure that without anti-lock, it is
going to have a point where the tires will just lock up. I am curious of how
it turns out, but this is still less $ then if I bought even the cheaper Turner
front & rear disc kits. It also fills my 17" wheels, which is what I wanted. I
also found a local CNC machinst that wants to make brackets, his bid was
the best so far, but he hasnt replied back to my Email - keep yah posted!

http://hometown.aol.com/sbca96/images/AvantiRims/Avanti03Rims1.jpg

Tom

ROADRACELARK
05-26-2006, 09:46 PM
WAY TO GO TOM, :D We're waiting with pregnant anticipation!!!
Dan

sbca96
05-26-2006, 09:57 PM
quote:Originally posted by ROADRACELARK

WAY TO GO TOM, :D We're waiting with pregnant anticipation!!!
Dan


Thanks Dan ... I would like to CLARIFY before I get ripped for the
comment on the Turner brakes. I MEANT "cheaper" as in less cost, the
front and rear setup that I was going to get from Steeltech was a tad
more money then the Turner front and rear disc setup. It WASNT a pot
shot at Turner - just FYI (gotta be REAL careful on here).;)

Tom

sbca96
06-07-2006, 12:35 AM
look what came from UPS today!!

http://hometown.aol.com/sbca96/images/avantibrakeproject/PBRcalipers/Mach1CobraBrakes1.JPG

http://hometown.aol.com/sbca96/images/avantibrakeproject/PBRcalipers/Mach1CobraBrakes2.JPG

http://hometown.aol.com/sbca96/images/avantibrakeproject/PBRcalipers/Mach1CobraBrakes3.JPG

http://hometown.aol.com/sbca96/images/avantibrakeproject/PBRcalipers/Mach1CobraBrakes4.JPG

And my braided stainless steel hoses!!

http://hometown.aol.com/sbca96/images/avantibrakeproject/PBRcalipers/stainlesssteelbraidedlines.JPG

The rotors are being shipping tomorrow, & MIGHT be here by the weekend
but chances are early next week.

Tom

stude53
06-07-2006, 08:37 AM
Hey Tactful Tom,

Those parts look beautiful.[8D] I'll be watching for your test results.

Regards,
Bob (stude53)

sbca96
06-07-2006, 12:18 PM
quote:Originally posted by stude53

Hey [u]Tactful</u> Tom,

Those parts look beautiful.[8D] I'll be watching for your test results.

Thanks.. I am going to TRY and turn over a new leaf, I am a Taurus
so dont expect perfect results from me, the brakes should be fine.;)

Tom

ROADRACELARK
06-07-2006, 01:18 PM
From the pictures you show, DON'T STOP NOW!!! (no pun intended:D) This looks great! My previous post still applies:). I've started saving my money. 2 months ago you said this would be a good addition to my Challenger. I'm leaning your way!:D
Dan

sbca96
06-07-2006, 05:22 PM
quote:Originally posted by ROADRACELARK

From the pictures you show, DON'T STOP NOW!!! (no pun intended:D) This looks great! My previous post still applies:). I've started saving my money. 2 months ago you said this would be a good addition to my Challenger. I'm leaning your way!:D

Well I guess the proof IS in the pudding, but its not that I didnt WANT
to keep moving on the project. I just dont have excess money stuffed
in a matress.;)

If you think that the calipers look neato, wait till you see them on
the 13 inch drilled and slotted rotors. hehe. Here is a teaser on
an early Mustang.

http://hometown.aol.com/sbca96/images/examplecobrabrakes/brakes2.jpg

I decided against the red caliper since I didnt really want to have an
emblem or "Cobra" printed on it. The Mach 1 calipers are identical,
except plain black. This will also match the rear calipers which are
also plain black. Between the start of this project, and my order the
site that I bought from (Stangsuspension.com) started making the rear
matching drilled/slotted rotors for the GT rear disc brakes. So that
means it will match all around.:D

Tom

sbca96
06-11-2006, 01:43 AM
The rotors came friday night, a welcome surprise. I havent checked the
hub clearance with the set of unmodified hubs yet, too many other things
in 'normal' life get in the way. But I took some pics this evening.

Judging from THESE pictures .. can anyone guess what ELSE I bought this
past week? Friday night to be exact. The hint is its not IN the pictures. ;)

Front rotors :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_001a.jpg

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_002a.jpg

Rear rotor :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_003a.jpg

Front and rear rotor :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_004a.jpg

PBR Caliper on front rotor :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_005a.jpg

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_006a.jpg

A little comparison between the factory rotor and the Cobra rotor :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_007a.jpg

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/cobra_rotors_008a.jpg


Opening the boxes made me say "oooooooo , aaaaaahhhh" kinda like you
hear when people are watching fireworks. With the zinc plating, they dont
have that gooey grease on them to keep the rust off like the Autozone GT
Mustang rotors I bought.

Tom

ROADRACELARK
06-11-2006, 10:31 AM
Tom,
Those look great!:D Can't wait to see them on the car and see how your 0-60-60-0 stats are.:)
Dan

sbca96
06-16-2006, 01:53 AM
Tonight when I got home from work, I finally brought the two front drums
into the garage and pressed the hubs out. I cleaned one of the hubs up a
bit and then the moment of truth - will it fit inside the Cobra rotor without
any modifications?! The answer?? YES!!! :lol: :P :D :wink:

Here are the pictures to prove it ...

Stock hub, just removed from drum :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_001a.jpg

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_002a.jpg

Sittin on the edge of the Cobra disc, thank goodness that ugly rusty thing
is covered up by the sexy Cobra rotor!

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_003a.jpg

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_004a.jpg

You can see ... NOT modified :D

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_005a.jpg

SUCCESS!!! The assumption was correct ... wheeeeeeew!

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_006a.jpg

Dead on from above :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_007a.jpg

Little off to the side :

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_008a.jpg

Fits perfect ... couldnt ask for more!

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_009a.jpg

Closeup to show the rusty untouched surface, plenty of room!

http://hometown.aol.com/sbca96/images/avantibrakeproject/CobraRotors/fitment/Cobra_rotor_fitment_010a.jpg

Thats a big load off my mind. Now to order the longer wheel studs, drill
my holes for the inference fit for the knurls. Then to dril the holes in the
rotor to the next SAE size from the stock metric. There is an option here,
you could have each stud turned to fit the rotor, but I would rather drill
the rotor holes a little larger, it goes MUCH quicker! :wink:

Tom

avantilover
06-16-2006, 04:57 AM
Brakes look great especially as the calipers are "Made in Australia" :D Good ole aussie technology. Good luck with them.

John Clements
Avantilover, your South Australian Studebaker lover!!!

ROADRACELARK
06-16-2006, 08:53 AM
Tom,
It's lookin' better and better every time you post. Your pictures say it all...Keep up the good work;):)
Dan

sbca96
06-16-2006, 06:58 PM
quote:Originally posted by avantilover

Brakes look great especially as the calipers are "Made in Australia" :D Good ole aussie technology. Good luck with them.


They are considered to be the best factory available calipers, being
used on the Cobra, Mach 1, Mustang GT, Corvette, Camaro, Firebird,
and the GTO (you know it as the Monaro).


quote:Originally posted by ROADRACELARK
It's lookin' better and better every time you post. Your pictures say it all...Keep up the good work

Thanks Dan! I do REALLY appreciate your input on each post, its quite
helpful to get the positive feedback. I am SO glad that my assumption
paid off, since I didnt have the Cobra rotors I had to make the simple
conclusion that if the 60's Ford hubs fit inside with no modifications
then it stands to reason that since Stude used the same bolt pattern
their hubs would be similar sized, and would also fit.;) Logic.[8D]

Tom

N8N
06-16-2006, 08:24 PM
so these are actually easier to use than the rotors you originally used? Or you turned down the hubs in the rear? In either case, looks awesome. What are the smallest diameter wheels that you can fit over the calipers?

nate

--
55 Commander Starlight
62 Daytona hardtop
http://home.comcast.net/~njnagel

sbca96
06-17-2006, 02:42 AM
quote:Originally posted by N8N

so these are actually easier to use than the rotors you originally used?
Sorry for the confusion, the brakes that are on the car are 11 inch
GT rotors, the inside diameter for the hubs in the GT rotor is much
smaller then the 13" Cobra rotor. To use the GT brakes, the hubs
need to be turned down so they fit inside the GT rotor, as you can
see from the above pictures, the Cobra fits without any turning. All
thats required is to put in the longer studs.


quote:Or you turned down the hubs in the rear?
Interestingly enough, the REAR rotors for the GT have a larger inside
diameter then the fronts, so the Stude rear hubs fit inside just fine.


quote:In either case, looks awesome.
Thanks! This is why I have been so excited about this project!! The
fitment of the Cobra rotor was the last piece of the puzzle (since I
didnt have any to measure, and was only going by the fact that the
early Ford hubs fit without being turned down.


quote:What are the smallest diameter wheels that you can fit over the calipers?
Unfortunately for those who do not like "rubber band" tires, only 17
inch or larger will clear these massive brakes. Sorry!!

Tom