Another Brake Upgrade question

dnsherrill

dnsherrill

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I've got some spindles that are already hub-swapped, but before I put them on I want to upgrade the brakes to 13'' rotors.
Here is what i just bought for calipers: 94 C4 vette PBR's (w/brackets)
http://www.ebay.com/itm/170975491512?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
94vetpbr_zps29f8f0bb.jpg

and
here's the rims I have (17''x8'') Ford oem for a '98 Cobra:
clwheels_zps7ff1666e.png

chrims_zpsf1fc1e45.png

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I'm just wondering how many of you say the rims will clear, and how many say 'close, but not quite'
 
The vette calipers will work and will clear the 98 Cobra wheels just fine.

You do need the Cobra caliper bracket to match up to the Mark VIII unless you want to modify the spindle.

The vette uses 14mm bolts instead of 12mm so if you decided to stay with the vette brackets you would need to open up the mounting holes in the spindle by 2mm. The offsets and bolt spacing of the bracket is the same as the Cobra.

-Alan
 
lobird91 said:
The vette uses 14mm bolts instead of 12mm so if you decided to stay with the vette brackets you would need to open up the mounting holes in the spindle by 2mm.
-Alan
Click to expand...
can I just tighten the 14mm vette bolts til they spin, then give it another 1/2 turn?
:facesjump
jk
 
87TTOPGT420 said:
not to go off topic...is $105/each a good price for reman cobra calipers...my local napa can get them for me
Click to expand...
I got both of those vette calipers for 110 shipped...but I think the Cobra brackets are gonna be about $100 each? or mod the spindle (tap to 14mm)?
 
Hey Alan...you're only 2 hours away.....what are you doing this weekend?
 
ah.... You know that Ebay auction is for only one caliper right? (or is that just for the pic, otherwise ignore me.)
 
Shoot me a PM when you get ready, I have done plenty brake upgrade/hubswaps would be more than happy to help out if you want to make the ride.

-Alan
 
Hoping to put the Brembo setup on the Mark this week or next as work and the baby allow lol.

Building a jig right now to hold the spindles so I can "easily" make another set since I will still need a set for my race car when it gets ready.

Really the only reason I broke down and decided to put these on the Mark is because my 95 GT needs the brakes re-done so I want to put the Cobra setup on it....

-Alan
 
Will definitely follow your progress and look forward to your evaluation of the performance.
 
I'd actually like to see some (before and after) braking distance results
 
No real hard facts to support this since I haven't tested, but I suspect distance will not be much shorter than what can be achived with Cobra calipers.

The moment of torque will be a little greater with the 14inch rotor so that will help, but 4 piston fixed calipers don't really provide increased stopping power. They will however hold stopping power much better under repeated use situations.

Like I said in my original post when I first built the setup I did it for a Thunderbird that we plan on road racing. It is a big, heavy car that will see a lot of braking action, and I have concerns about the Cobra calipers being reliable under those conditions since I have seen many fail on road coursed Mustangs that weigh at least 500 pounds less.

-Alan
 
dnsherrill said:
I got both of those vette calipers for 110 shipped...but I think the Cobra brackets are gonna be about $100 each? or mod the spindle (tap to 14mm)?
Click to expand...

the calipers im looking at are complete with brackets...throw some pads and rotors and away ago...from what i see...will be ordering a pair for my lincoln and a pair for my 98 mustang gt
 
SATURN5 said:
ah.... You know that Ebay auction is for only one caliper right? (or is that just for the pic, otherwise ignore me.)
Click to expand...

he had both, listed separately, offered 45 each, he bit.....110 for both shipped
 
after searching for the Cobra brackets I concluded it wasn't worth the $...so I found some '98 Cobra calps with brackets for 150.....getting the C4 vette PBR calps was a bad idea;
-I'm rebuildng and repainting all 4 calps (front Cobras, rear stock), thought maybe doing the rears was a waste but wth....most any mod (not repair) done could be deemed a 'waste', right?...thought maybe I could find rotors made in USA, thought wrong unless I want factory oem from the stealer for $215 each...even Federals are made off-shore now...
-does anybody know which rear rotors I can use for stock M8 brakes with 4.5'' hubs? base or GT rotors?
I already have the M8 rear rotors which were machined to 4.5'' lug pat but thought about getting new rear rotors also at this time
 
For everyone with Cobra two piston brake set up, what's the size of the banjo bolt? According to O'Reilley Auto, it's supposed to be M10 X 1.5. I picked up a loaded pair of calipers, and the bolt stops after one turn. It seams smaller. Any ideas?
 
GMAN said:
For everyone with Cobra two piston brake set up, what's the size of the banjo bolt? According to O'Reilley Auto, it's supposed to be M10 X 1.5. I picked up a loaded pair of calipers, and the bolt stops after one turn. It seams smaller. Any ideas?
Click to expand...

You need to ask for the one for a Cobra.. m10 x 1.5 is the Mark bolt, which is the same as many many many other ford calipers
 
GMAN said:
what's the size of the banjo bolt? According to O'Reilley Auto, it's supposed to be M10 X 1.5.
Click to expand...
just checked to make sure; Cobra BB on the left (5/8''), Mark on the right (10mm)
P2280188_zpsfaeefed2.jpg

P2280189_zps9eb994e0.jpg

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btw, what did those loaded calps set you back? bout a buck 20 each?
 
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