Brake system for new build opinions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

P-10Crew · 11-14-2020, 12:04 PM

Truck: 53 AD, porterbuilt bagged, 9” big new style, 20x8.5 F 20x10R
I’m getting ready to spring for all the parts for the brake system on this build and would like some opinion’s and direction please.
If I ran 13” or 14” front rotors with 12” rear do those of you with experience think I could get away with running a non assist MC?
The reason I ask this is I would like to run the master cylinder under the floor to clean up the firewall. I have to run the Cpp modular or wilwood pro drop spindles. I have been looking at the wilwood 4 piston stuff but it’s at the top and possibly over the top of the budget. Cpp offers a decent looking front 13” kit but their rear kit for the 9” uses a completely different looking caliper.
Any ideas? TIA

**HO455** · 11-14-2020, 12:49 PM

The master cylinder needs to match the caliper bore sizes not the rotor diameter. There is almost always more than one caliper that will work on any given rotor.
This web site should help explain
https://www.joesracing.com/master-cylinder-math/

Andy4639 · 11-14-2020, 02:55 PM

My 2 cents, go as big as you can up front it does 95% of the stopping then just go with a normal size rear. Are something that looks close to the front.

LS short box · 11-14-2020, 05:40 PM

I would give Tobin at Kore3.com a call. He sells brake kits from mild to wild. He can also spec out the MC that you will need.
If it's in the budget I would go 14" in front with your 20" wheels. The 14" rotors fill up the wheel quite nicely.
On my 68 C10 I'm running C5/C6 14" front brakes and 1997 Camaro 12" brakes in the back.

**xabichin67** · 11-14-2020, 09:58 PM

Quote:

Originally Posted by LS short box

I would give Tobin at Kore3.com a call. He sells brake kits from mild to wild. He can also spec out the MC that you will need.
If it's in the budget I would go 14" in front with your 20" wheels. The 14" rotors fill up the wheel quite nicely.
On my 68 C10 I'm running C5/C6 14" front brakes and 1997 Camaro 12" brakes in the back.

X2 on Tobin at Kore3.

One of the most stand up and knowledgeable guy in the business.
No regrets on the many purchases I have made with Kore3

11-14-2020, 12:04 PM	#1
P-10Crew Registered User Join Date: Nov 2017 Location: Rapid City South Dakota Posts: 3	Brake system for new build opinions Truck: 53 AD, porterbuilt bagged, 9” big new style, 20x8.5 F 20x10R I’m getting ready to spring for all the parts for the brake system on this build and would like some opinion’s and direction please. If I ran 13” or 14” front rotors with 12” rear do those of you with experience think I could get away with running a non assist MC? The reason I ask this is I would like to run the master cylinder under the floor to clean up the firewall. I have to run the Cpp modular or wilwood pro drop spindles. I have been looking at the wilwood 4 piston stuff but it’s at the top and possibly over the top of the budget. Cpp offers a decent looking front 13” kit but their rear kit for the 9” uses a completely different looking caliper. Any ideas? TIA

11-14-2020, 12:49 PM	#2
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,382	Re: Brake system for new build opinions The master cylinder needs to match the caliper bore sizes not the rotor diameter. There is almost always more than one caliper that will work on any given rotor. This web site should help explain https://www.joesracing.com/master-cylinder-math/ __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

11-14-2020, 02:55 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Brake system for new build opinions My 2 cents, go as big as you can up front it does 95% of the stopping then just go with a normal size rear. Are something that looks close to the front. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

11-14-2020, 05:40 PM	#4
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,136	Re: Brake system for new build opinions I would give Tobin at Kore3.com a call. He sells brake kits from mild to wild. He can also spec out the MC that you will need. If it's in the budget I would go 14" in front with your 20" wheels. The 14" rotors fill up the wheel quite nicely. On my 68 C10 I'm running C5/C6 14" front brakes and 1997 Camaro 12" brakes in the back.



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