Brakes Braking Question

Mattstang04

15 Year Member

Sep 15, 2006

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St. Louis, MO

Feb 18, 2014

#1

• Feb 18, 2014

• #1

My 04 Gt has no anti-lock brakes. I notice that if I get aggressive with the braking, the car likes to lock up especially at higher speeds. This is not a new problem, its always been that way. I don't believe it is a result of anything not working properly, just how these brakes are.

The current setup is stock calipers, Motorcraft pads, and Motorcraft rotors.

My question is, would a cobra front brake upgrade actually help or just make it lock up even easier? Could this be improved with upgraded rotors and pads?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,162

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Massachusetts

Feb 26, 2014

#2

• Feb 26, 2014

• #2

If you were to swap to Cobra brakes, you'd just make your problem worse.

I would be looking at your tires here. Your brakes have enough power, but the fact that your wheels lock up easy suggest the tires are lacking in grip. A stickier tire would resist locking up due to traction with the road surface.

Are you locking your rears or fronts up?

There could be other reasons for this as well, specifically tires being over or under inflated.

What brand and model tires do you have up front? How old are they? What is the traction rating?

 

Mattstang04

15 Year Member

Sep 15, 2006

1,152

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St. Louis, MO

Feb 26, 2014

#3

• Feb 26, 2014

• #3

I have BFG KDW NTs. They aren't even a year old. I keep them inflated around 38 psi. After talking it over with a few friends, I'm thinking that the freezing cold weather lately has made the ground to cold for these tires. They are a summer tire and probably cant bite on the cold roadway.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,162

17,856

224

Massachusetts

Feb 26, 2014

#4

• Feb 26, 2014

• #4

38psi might also be a tad over inflated. That can reduce traction. What tire size?

But you nailed it with your second thought. Summer performance tires do not grip well in cold weather on cold pavement. Can actually be dangerous in some regards as well.

 

Mattstang04

15 Year Member

Sep 15, 2006

1,152

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St. Louis, MO

Feb 26, 2014

#5

• Feb 26, 2014

• #5

Rears are 295/35/18 and fronts are 275/35/18. Loved these tires in the summer time, though they are a bit noisy. The exhaust far over powers the sound of the tires most of the time, so its not a big deal.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,162

17,856

224

Massachusetts

Feb 27, 2014

#6

• Feb 27, 2014

• #6

38psi is a tad high for that size. You may want to experiment with lower pressures

 

flstang65

10 Year Member

Dec 6, 2007

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SE Georgia

Feb 27, 2014

#7

• Feb 27, 2014

• #7

Maybe add an adjustable brake proportioning valve?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,162

17,856

224

Massachusetts

Feb 27, 2014

#8

• Feb 27, 2014

• #8

flstang65 said:

Maybe add an adjustable brake proportioning valve?

Click to expand...

WOuld be difficult to do as the 99+ stang as they use separate lines for the rear brakes. Would be hard to properly dial in.

Also not needed. Boils down to summer rubber that is overinflated on cold pavement. Lack of traction is the issue...not the brakes

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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134

Mar 1, 2014

#9

• Mar 1, 2014

• #9

32.5 psi is correct a few psi off makes a big difference

 

Mattstang04

15 Year Member

Sep 15, 2006

1,152

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St. Louis, MO

Mar 3, 2014

#10

• Mar 3, 2014

• #10

I will lower them down to 32.5 and wait for the ground to thaw out. Hopefully that will do the trick.