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I have a 95 mustang and wanted to install 99-04 Mustang 99-04 Gt Front Calipers. Are the caliper brackets the same with the on the 95 and the never 99-04 style brakes?
 

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you need the 99-04 calipers and the caliper mounting bracket. You will then have to grind a tiny bit off the spindle to make the calipers fit.
 

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Slight grinding of the spindle...and you'll need the 99+ brake lines
 

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I did the exact same thing. I put front calipers from an 02 GT on my 95. The calipers/brackets line right up with the holes in the 95, but as was said previously, you have to grind the spindle just a little bit. I used an angle grinder to do it. Drape a wet cloth over your wheel hub and your spring and your tie rod/suspension stuff so you don't get all that metal dust all over in there. You only have to take off just a little bit, maybe 1/8" to 3/16" at most in one place if I recall. The stock brake lines don't fit the calipers right, but if you're doing all this, upgrade to SS lines. That's what I did.
 

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The calipers are 2-piston, but have slightly less hydraulic surface area if you calculate the piston size. The stock 65mm pistons are 3318 mm^2 while the 99+ calipers are 3110 mm^2. The result may be that you may notice your pedal slightly firmer...but not by much.
 

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Mustang5L5 is right, my pedal was firmer afterwards. It wasn't bad and I've gotten used to it completely now. The brakes were also more linear after this. Even though I downgraded pads (from Hawk HP+ to Hawk Ceramics because of the copious amounts of brake dust) the performance was just as good.
 

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I'd have to do the math to determine if the hydraulic ratio would be similar, but perhaps a change to a '93 Cobra MC would soften the pedal up.


Just a thought...i'll have to calculate it later on.

Basically, the 95 GT/ uses a 1 1/16" bore MC while the '93 Cobra uses a 1" bore MC. The slightly smaller bore may give you a softer pedal again.

I'll do the math out later
 

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Ok, here's some math

1994-1998 GT/V6
Front calipers pistons = 65mm = 3318 mm^2 x 2
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 1/16 = 26.98mm = 571 mm^2

Piston area/mc bore area = 8904mm^2 / 571mm^2 = 15.6:1 ratio


1994-1998 GT/V6 with 99-04 GT PBR's

Front calipers pistons = 44.5mm x 2 = 3110 mm^2 x 2
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 1/16 = 26.98mm = 571 mm^2

Piston area/mc bore area = 8488mm^2 / 571mm^2 = 14.8:1 ratio


The lower the ratio, the firmer the pedal.

SO, lets see what happens if you use a '93 Cobra MC. It's a direct swap in. Fittings will swap over and everything


1994-1998 GT/V6 with 99-04 GT PBR's and '93 cobra MC

Front calipers pistons = 44.5mm x 2 = 3110 mm^2 x 2
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 = 25.4mm = 506 mm^2

Piston area/mc bore area = 8488mm^2 / 506mm^2 = 16.7:1 ratio

The 99-04 V6 model Mustang uses a 1" bore MC and vacuum booster with it's PBR setup. So if you want to see how the pedal feels with a '93 Cobra MC, go test drive a 99-04 v6.
 

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That's a very interesting calculation. I've driven an 03 V6 before and the pedal in my opinion seems *almost* too squishy. When it gets too squishy, you lose the linearity of the braking pressure. The latest Civics are really hard for me to control well. The brakes are almost like they're full on or full off. Very little in between which drives me nuts. I sort of like the slightly firmer feel. I think it gives me finer control of the brakes. What's the ratio on a stock 99-04 GT?
 

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That's a very interesting calculation. I've driven an 03 V6 before and the pedal in my opinion seems *almost* too squishy. When it gets too squishy, you lose the linearity of the braking pressure. The latest Civics are really hard for me to control well. The brakes are almost like they're full on or full off. Very little in between which drives me nuts. I sort of like the slightly firmer feel. I think it gives me finer control of the brakes. What's the ratio on a stock 99-04 GT?

The 99+ GT, Mach 1 and Cobra use a 1 1/16"MC like the 94-95GT, except they use Hydroboost which i beleive gives a little more assist than a vacuum booster, so i am unsure if it's an equal comparison.

I did a few others out with vacuum boosters

1994-1998 Cobra
Front calipers pistons = 38mm = 1134mm^2 x 4
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 15/16 = 23.81mm = 445 mm^2

Piston area/mc bore area = 6804 mm^2 / 445mm^2 = 15.2:1 ratio


1993 Cobra
Front calipers pistons = 60mm = 2827mm^2 x 2
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 = 25.4mm = 506 mm^2

Piston area/mc bore area = 7922 mm^2 / 506 mm^2 = 15.6:1 ratio


1993 Cobra R
Front calipers pistons = 38mm = 1134mm^2 x 4
Rear caliper pistons = 45mm = 1590 mm^2 x 2 (1992-1993 Mark 7 rear brakes)
MC piston bore = 1 = 25.4mm = 506 mm^2

Piston area/mc bore area = 7716 mm^2 / 506mm^2 = 15.2:1 ratio




So seems a lot of the factory setups with vac boosters use a 15:1 ratio or so.


Just for the hell of it say you toss Cobra calipers on your 94-95 GT. I'll do both the 38mm versions and 40mm versions

94-95 GT with 38mm cobra calipers
Front calipers pistons = 38mm = 1134mm^2 x 4
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 1/16 = 26.98mm = 571 mm^2

Piston area/mc bore area = 6804mm^2 / 571mm^2 = 11.9:1 ratio


94-95 GT with 40mm cobra calipers
Front calipers pistons = 40mm = 1256 mm^2 x 4
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 1/16 = 26.98mm = 571 mm^2

Piston area/mc bore area = 7292mm^2 / 571mm^2 = 12.7:1 ratio


And that's why a lot of guys recommend changing the master cylinder when putting cobra brakes on a 94-95 GT. The MC is just too big for the front calipers
 

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yes
 

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Def not a bolt-on affair. You'll need SN95 spindles, rotors, brake lines, master cylinder and other supporting mods as well.
 

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unless you are going rear disc - you do NOT need the master cylinder changed..
not true for every case. my last vert had GT PBR's up front and stock drums in the rear. needed a new MC to get the pedal right.
 

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unless you are going rear disc - you do NOT need the master cylinder changed..
Def a case by case basis depending on which calipers you use up front.
 

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Ok, here's some math

1994-1998 GT/V6
Front calipers pistons = 65mm = 3318 mm^2 x 2
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 1/16 = 26.98mm = 571 mm^2

Piston area/mc bore area = 8904mm^2 / 571mm^2 = 15.6:1 ratio


1994-1998 GT/V6 with 99-04 GT PBR's

Front calipers pistons = 44.5mm x 2 = 3110 mm^2 x 2
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 1/16 = 26.98mm = 571 mm^2

Piston area/mc bore area = 8488mm^2 / 571mm^2 = 14.8:1 ratio


The lower the ratio, the firmer the pedal.

SO, lets see what happens if you use a '93 Cobra MC. It's a direct swap in. Fittings will swap over and everything


1994-1998 GT/V6 with 99-04 GT PBR's and '93 cobra MC

Front calipers pistons = 44.5mm x 2 = 3110 mm^2 x 2
Rear caliper pistons = 38mm = 1134 mm^2 x 2
MC piston bore = 1 = 25.4mm = 506 mm^2

Piston area/mc bore area = 8488mm^2 / 506mm^2 = 16.7:1 ratio

The 99-04 V6 model Mustang uses a 1" bore MC and vacuum booster with it's PBR setup. So if you want to see how the pedal feels with a '93 Cobra MC, go test drive a 99-04 v6.
Here's another way too D (diameter)^2x .7854 is the same.....just a handy # to cloud your brain with...lol
 
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