4 Piston Big Brake Upgrade from 2019-20

[Dantheman1540]

My swap is halfway through but I needed lunch so I'll post my current progress and testing.

I started with 3 brake tests from 55mph to dead stop on flat ground with one solid push and hold of the brake, no pumping or anything weird. I measure the distances by walking heal to toe in a size 12 Salomon X Crest hiking shoe which measures just under 13".

First attempt was 87 steps, 2nd was 80 and third was 77. Of course its impossible to know if I hit the brake at exactly the same point everytime but i did my best. I think the main variance was the difference in tire heat. The first attempt was after a normal drive around the block to heat everything up and the 2 attempts after were directly after one another so the tires and brakes were likely considerably hotter and more effective. I will do the same tests after a week of driving and breaking the new pads and rotors in.

My point of reference to apply the brakes was dead center of the 4 board gates entryway in the picture. I did also have a white line painted across the road but it was impossible to see from the drivers seat.

 

[Dantheman1540]

Brakes are fully installed and done, did a short break in lap and tried the test again. On just one try because I don't think they are fully bedded it stopped 6 steps short of the quickest stop with the old brakes, so that puts it at 71 steps which is almost 10% shorter distance. Give them a week and I'll do a round of three and see if it improves.

Along with this brake swap I did also do a massive 6 bottle flush of brake fluid because there was and still is some nasty stuff in the master. Plus I replaced the last of my rubber lines on the front passenger side with a SS line.

 

[Sam Harris]

Brakes are fully installed and done, did a short break in lap and tried the test again. On just one try because I don't think they are fully bedded it stopped 6 steps short of the quickest stop with the old brakes, so that puts it at 71 steps which is almost 10% shorter distance. Give them a week and I'll do a round of three and see if it improves.

Along with this brake swap I did also do a massive 6 bottle flush of brake fluid because there was and still is some nasty stuff in the master. Plus I replaced the last of my rubber lines on the front passenger side with a SS line.

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Very nice! Looks like you had the NNBS swap in previously as well..?

 

[Dantheman1540]

Very nice! Looks like you had the NNBS swap in previously as well..?

I didn't think so but I've never touched the brakes on this truck. Knowing Axekick was a member here and PT.net I wouldn't be surprised, looks like a powerstop kit for sure, and they have a ton of life left! Easily 20-40k left on the pads IMO.

I'll measure a rotor when I go back to the shop. If its 13" it should be the NNBS.

 

[Sam Harris]

I didn't think so but I've never touched the brakes on this truck. Knowing Axekick was a member here and PT.net I wouldn't be surprised, looks like a powerstop kit for sure, and they have a ton of life left! Easily 20-40k left on the pads IMO.

I'll measure a rotor when I go back to the shop. If its 13" it should be the NNBS.

I’ll bet they are. Those calipers look correct.

 

[Dantheman1540]

I’ll bet they are. Those calipers look correct.

I agree, they looked super familiar to me plus the new ones dont look 1.5" bigger than the old ones

 

[corvette744]

I agree, they looked super familiar to me plus the new ones dont look 1.5" bigger than the old ones

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Hmm now im getting interested look's like 13 inch rotors let us know for sure.I like the macGyver testing real world. question could you acivate your abs mashing the brake pedal with the old brakes and the new brakes-i realize you have not bedded in the new ones but im interested. P.S i have those same rims on my tahoe do they fit without spacers.I assume you shaved them down i didnt read all this thread but will if they fit.

 

[Dantheman1540]

Hmm now im getting interested look like 13 inch rotors let us know for sure.I like the macGyver testing real world. question could you acivate your abs mashing the brake pedal with the old brakes and the new brakes-i realize you have not bedded in the new ones but im interested. P.S i have those same rims on my tahoe do they fit without spacers.I assume you shaved them down i didnt read all this thread but will if they fit.

ABS activates with both setups. I did notice that it has to work considerably harder with the new brakes where before it seemed the brakes were underpowered for the 285 Nittos. I will do a good dirt road brake mash with my final testing to show the ABS activating.

So before the hump was ground down these wheels would not clear without a 1/4" spacer which is really nothing. With the hump gone and the caliper powder coated it clears but it's very very close so I added the spacers anyway. After a week I'll pull everything back apart to check how it's doing and recheck how close it is to get a measurement for you.

A bit about the spacer, I've run these in and off since I got the truck and haven't had any issues with them. Even the tire guys don't pitch a fit. So I wouldn't worry about running them but, I too prefer not to run them if I don't have to.

 

[randeez]

My swap is halfway through but I needed lunch so I'll post my current progress and testing.

I started with 3 brake tests from 55mph to dead stop on flat ground with one solid push and hold of the brake, no pumping or anything weird. I measure the distances by walking heal to toe in a size 12 Salomon X Crest hiking shoe which measures just under 13".

First attempt was 87 steps, 2nd was 80 and third was 77. Of course its impossible to know if I hit the brake at exactly the same point everytime but i did my best. I think the main variance was the difference in tire heat. The first attempt was after a normal drive around the block to heat everything up and the 2 attempts after were directly after one another so the tires and brakes were likely considerably hotter and more effective. I will do the same tests after a week of driving and breaking the new pads and rotors in.

My point of reference to apply the brakes was dead center of the 4 board gates entryway in the picture. I did also have a white line painted across the road but it was impossible to see from the drivers seat.
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finally, some real science

 

[Dantheman1540]

finally, some real science

I should leave this swap on one side and put the old brakes on the other. Whichever side pulls harder wins.


Anyone want to go halfsies on this $12.99 lab coat? Then I can up the level of science and shit.