Brake upgrade - Where to start? - JeepForum.com
 
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post #1 of 10 Old 08-16-2019, 09:45 PM Thread Starter
LimeLJ
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Brake upgrade - Where to start?

I just got finished with my LS swap and now I am having to use more pedal travel to keep it stopped since the engine is overpowering the brakes easier.

In my rebuild I put in new calipers along with Centric Premium pads and rotors on all four wheels. Fresh fluid with all lines fully flushed along with new soft lines. I also cleaned up and fixed the wear on the caliper knuckle ears.(My rear brakes were so covered in differential oil that were not doing anything anyway.)

32" tires, 4.88 gearing, stock LJ axles.

I could jump straight to a big brake kit, but should I start somewhere lesser first such as booster or master cylinder? I do not wish to throw a pile of money at a minor problem if it just needs a small tweak.


2004 Jeep Wrangler Unlimited - L99/LS3 6L80E Swap
1997 Jeep Comanche - 4.7L Stroker, Lifted, "Restored"
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post #2 of 10 Old 08-16-2019, 11:38 PM
Shark_13
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There was a post not long ago, same situation, ls swap and weak brakes.... Something about vacuum maybe.... I'll try to find it.

Get out and explore.
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post #3 of 10 Old 08-17-2019, 02:24 AM
AjRagno
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post #4 of 10 Old 08-17-2019, 09:45 AM
Shark_13
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Yep that's the one, thanks

Get out and explore.
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post #5 of 10 Old 08-17-2019, 08:35 PM Thread Starter
LimeLJ
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I should clarify: The ability of the brakes to stop the Jeep is fine. It also feels like it did before the swap and brake system refresh. However, to keep the Jeep from creeping forward I have to apply more braking force when the engine is idling.

I will see if I can source a vacuum gauge to double check the readings.

2004 Jeep Wrangler Unlimited - L99/LS3 6L80E Swap
1997 Jeep Comanche - 4.7L Stroker, Lifted, "Restored"
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post #6 of 10 Old 08-17-2019, 09:04 PM
WSS
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Black Magic big break kit. I'm gonna do it this winter.

I have a 5:1 transfer case and it is not stopping when in low with a little throttle. This seems to be the best solution that I have researched.

15" rim version:

https://www.shop.blackmagicbrakes.co...-BBK-NDM15.htm

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post #7 of 10 Old 08-19-2019, 08:57 AM
TJnBC
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must be an Auto thing with an LS swap

BBK would be the choice or a better set of rotors and pads. I upgraded my pads and rotors and the Jeep stops just fine, even towing a trailer BUT mine is a manual.

2006 LJR...the madness begins again
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post #8 of 10 Old 08-19-2019, 09:31 AM
TheBoogieman
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I wish I had RPPs. (Rich People Problems). 3 ex-wives took care of any money I "might" have had.

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Originally Posted by jeepinmichguy_ View Post
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03' Rubicon/Zone 4.25" combo lift/Rancho 9000XL shocks/5.13 gears-35" MTZs/BM brakes
99' XJ / 5" BDS lift/ 33" DC extreme country MTs. JEEP #18
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post #9 of 10 Old 08-19-2019, 10:19 AM
CrashOdle
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I 2nd BMB

If you find its not a vacuum issue, I'd reach out to Black Magic Brakes. Speak to Blaine. They offer upgraded pads and roters and big brake kits.

81 CJ7 258 Howell TBI/T999/Dana 300/Dana 44s locked Methods and 35" MTRs

06 LJ on 44s Full Traction LA w/ Kings rolling 17" Racelines and 37" Toyo muds, Genright armor up, under and around

"but babe, it's a safety modification...."
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post #10 of 10 Old 08-19-2019, 10:58 AM Thread Starter
LimeLJ
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The vacuum seems to be fine. I also noticed that if I put it in neutral while stopped the entire left side of the Jeep drops about two inches from the lack of torque twist holding it up.

Once I get back from vacation I will consider tossing on a big brake kit.

2004 Jeep Wrangler Unlimited - L99/LS3 6L80E Swap
1997 Jeep Comanche - 4.7L Stroker, Lifted, "Restored"
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