Larger Tires - Lifts - Anyone Run Larger Brakes? - Chevy and GMC Duramax Diesel Forum
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Old 12-08-2011, 04:52 AM   eBay Motors  #1 (permalink)
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Larger Tires - Lifts - Anyone Run Larger Brakes?

Anyone running larger tires and/or lifts upgrading the front brakes to something to get more stopping power? I really noticed when I change to my 315/70/17's (34.65" tires) the braking is not nearly as good as with the 285's.

Just wondering is anyone found a good combo for rotors, pads or even calliper upgrades that works well.
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Old 12-08-2011, 05:26 AM   eBay Motors  #2 (permalink)
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I have never seen a set of aftermarket brakes on a duramax. Our braking system is designed to stop 17,000 pounds truck and trailer so your added 100 lbs is no big deal. I know people with 200,000 + on their original brake pads who have been running 295's the whole time, if they were over taxing the brakes the pads would prematurely wear. Spend your money elsewhere.........................

Also flush your brakes and they will work better..........................

Last edited by smokinlmm; 12-08-2011 at 05:29 AM.
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Old 12-08-2011, 05:39 AM   eBay Motors  #3 (permalink)
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Hey smokin' My brakes have never worked worth a crap since I got my truck. Unless, I slam on 'em. Then, they will work the next several times. I noticed a small leak appears to be from booster/master cylinder area. Just a wet spot. And, doesn't appear to be from master cylinder. At least not the plastic part. It is my understanding that these brakes work off the power steering boost? I found that out when my belt broke and I lost my brakes. That really sucked. Anyway, do you think flushing would help mine? I thought I might need to get some new seals for the booster and rebuild it, but haven't tackled that yet.
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Old 12-08-2011, 06:25 AM   eBay Motors  #4 (permalink)
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Hey smokin' My brakes have never worked worth a crap since I got my truck. Unless, I slam on 'em. Then, they will work the next several times. I noticed a small leak appears to be from booster/master cylinder area. Just a wet spot. And, doesn't appear to be from master cylinder. At least not the plastic part. It is my understanding that these brakes work off the power steering boost? I found that out when my belt broke and I lost my brakes. That really sucked. Anyway, do you think flushing would help mine? I thought I might need to get some new seals for the booster and rebuild it, but haven't tackled that yet.
If you have never flushed the brake and power steering fluid then yes it will make a significant diffrence. The fluids absorb water and contaminates and loose the ability to proper apply the hydrolic forces needed. There are a couple threads in the DIY section on how the flush the brakes and power steering systems.

The leaky high pressure lines are just par for the course for GM, I had mine redone at a hydrolic shop with smooth crimps instead of the GM bubble style crimps which fail easily when mine were due.............
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Old 12-08-2011, 07:35 AM   eBay Motors  #5 (permalink)
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Thank you, sir.
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Robert,

'03 Silverado, CCSB, 4WD 2500 HD,
20% injectors, ADII 165, K&N drop-in air filter,
buckstop bumper, w/ Warn powerplant winch, and PIAA fogs.
Rear airbags.

'02 CCLB 2WD 2500HD
white, stock w/t w/ ZF-6
(new to me) (loving this ZF-6!)
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Old 12-08-2011, 08:26 AM   eBay Motors  #6 (permalink)
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Quote:
Originally Posted by smokinlmm View Post
I have never seen a set of aftermarket brakes on a duramax. Our braking system is designed to stop 17,000 pounds truck and trailer so your added 100 lbs is no big deal. I know people with 200,000 + on their original brake pads who have been running 295's the whole time, if they were over taxing the brakes the pads would prematurely wear. Spend your money elsewhere.........................

Also flush your brakes and they will work better..........................
The brakes on these trucks really aren't that good..

To the op,
Ssbc makes a few sets of calipers and there is a company sold on dmaxstore.com that sells a full kit with 16" rotors, upgraded calipers etc etc.
Only problem with the 16" rotors Is that you need 20" rims or taller to run them..
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Old 12-08-2011, 10:18 AM   eBay Motors  #7 (permalink)
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I will be going to the bigger brake setup in a few months

my original pads are still good but the rotors are warped badly. With my 35" tires if someone was to stop suddenly in front of me they will be my new hood ornament
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Old 12-08-2011, 10:33 AM   eBay Motors  #8 (permalink)
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Still have factory brakes on my truck but once they wear out going to willwoods. Have the setup for the front sitting in the basement right now. Just need to buy the rear still which is another $2500...
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Old 12-08-2011, 10:40 AM   eBay Motors  #9 (permalink)
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Still have factory brakes on my truck but once they wear out going to willwoods. Have the setup for the front sitting in the basement right now. Just need to buy the rear still which is another $2500...
I was thinking I wouldnt need the backs because the front does most of the work. I hope I'm right, thats a lot of money for front and rear
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FabFour bumpers, Rancho 4in w/Bilstiens, HD tie rods and braces,35x12.5 Toyo MT on 20x10x4.5BS KMC Monsters
[BANKS intake,dual exhaust,intercooler]Diamond Eye down pipe, AFE tube, res. plug, PCV mod
4094avnt, 60% over nozzles, PPE race valve & fuel pickup, AirDog 150, Fitch fuel catalyst
Inglewood SCIV w/1056 C3 oiler, EFI live, Duramaxtuner DSP 5, Edge Insight
ProFab manifold/up pipes & 3" short bridge/boost pipe
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Old 12-08-2011, 11:33 AM   eBay Motors  #10 (permalink)
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Quote:
Originally Posted by smokinlmm View Post
I have never seen a set of aftermarket brakes on a duramax. Our braking system is designed to stop 17,000 pounds truck and trailer so your added 100 lbs is no big deal. I know people with 200,000 + on their original brake pads who have been running 295's the whole time, if they were over taxing the brakes the pads would prematurely wear. Spend your money elsewhere.........................

Also flush your brakes and they will work better..........................
I appreciate the fact that braking system was designed to handle the weight of the truck, trailers etc... but consider the unsprung weight we are adding by running larger rims and tires. It is not so much the 100 extra lbs of weight we need to consider, as this is insignifigant as a whole. It is the additional unsprung weight froam the larger tires adn rims which will have an adverse effect on the funtion of the brake/suspension components.

It'd be interestig to see if anyone who upgraded braking system noticed any signifigant gain of efficiency in their braking.

Like Humboldt said, with his 35's he certainly notices a difference, as do I with the 315's. Threashold braking to stop for the dork in front of you who slammed the brakes in his Corolla because he missed his turn becomes way less fun.
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2008 LMM CCSB Black on Black SLT Z71
4-6" Cognito NTBD Lift - HD Tie Rods -All Steering Upgrades - Traction Bars
Downpipe - SS Exhaust
All Season/Dirty Hooker Diesel Built Trans
EFI Live with DSP5 (tunes by IdahoRob) - AIRDOG II 165
Gauges - EDGE - INSiGHT CTS

Thanks to Tim @ TNE Diesel.

Last edited by Black 2500; 12-08-2011 at 11:37 AM.
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