Re: Brake routing 1970 charger wilwood
[Re: AndyF]
#2579931
11/18/18 07:06 PM
11/18/18 07:06 PM
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70charger512
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You'll just have to figure it out as you go. Mopar master cylinders use oversize fitting on them to keep people from installing them wrong. Aftermarket stuff like Wilwood don't do that. If you buy an aluminum master cylinder from Doctor Diff then it will have the correct fittings. The Doctor Diff master will also have the correct brake rod retention o-ring. The Wilwood master most likely won't have a brake rod rentention device. Ok thank you, i pretty much thought I would have to figure it out as i go. And i do plan on going with a Wilwood master though. There are just so many options: 1 or 2 piece front to rear kits, 4 or 5 piece front kits, and each of those have different options. Since there are so many options i figured itd be easier to ask here instead of trying to figure it out myself.
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Re: Brake routing 1970 charger wilwood
[Re: 70charger512]
#2579944
11/18/18 07:56 PM
11/18/18 07:56 PM
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70charger512
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One of the big things I don't understand is the different valves/blocks. If I have 12.19" 4 piston brakes in front and 11" 4 pistons out back, do I need any kinds of valves or could I run straight lines since they're all disc and the front rotors are bigger? How exactly does this work?
Last edited by Nick Stevanovski; 11/18/18 08:51 PM.
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Re: Brake routing 1970 charger wilwood
[Re: 70charger512]
#2580058
11/19/18 01:09 AM
11/19/18 01:09 AM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
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I Live Here
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One of the big things I don't understand is the different valves/blocks. If I have 12.19" 4 piston brakes in front and 11" 4 pistons out back, do I need any kinds of valves or could I run straight lines since they're all disc and the front rotors are bigger? How exactly does this work? Generally when I do a 4 wheel disc set up, no proportioning valve, no distribution block, the rear line directly off the master, the fronts directly off the master with a tee downline to break left/right front, I generally bend/form my own stainless hard lines, you may need an adjustable proportioning valve for the rears if you haven't sized your F/R caliper piston size to create an ideal 60/40 F/R brake bias, worse case scenario I would allow before adding an adjustable PV is a 70/30 F/R bias FYI, I temporarily install 4 hydraulic gauges one at each line/caliper end when I create a system so that I know exactly what pressure/bias I'm creating, I strongly recommend installing gauges temporarily as you design your system, I use gauges rated to 2000 psi, needed esp on a power assisted system, you can tee the gauges and the bleeder screw directly into the bleeder ports on the calipers, bleed and test the system in one shot... Mike
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Re: Brake routing 1970 charger wilwood
[Re: 70charger512]
#2580070
11/19/18 01:44 AM
11/19/18 01:44 AM
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Joined: Jan 2003
Posts: 5,439 So Cal
Sinitro
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NICK... My suggestion would be to call WilWood direct and talk to Mike Scully. Mike is head of tech support and can either answer your questions or connect U with the rite guy.. U might want to give him a break before calling as the fires were close by plus U got the Thanksgiving holiday this week. Just my $0.02...
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Re: Brake routing 1970 charger wilwood
[Re: 70charger512]
#2580078
11/19/18 02:13 AM
11/19/18 02:13 AM
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Joined: Jan 2003
Posts: 30,995 Oregon
AndyF
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I Win
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One of the big things I don't understand is the different valves/blocks. If I have 12.19" 4 piston brakes in front and 11" 4 pistons out back, do I need any kinds of valves or could I run straight lines since they're all disc and the front rotors are bigger? How exactly does this work? Designing a brake system isn't for amateurs! Brake system design is important and it requires some expert knowledge. The front to rear balance has to be correct or else you'll spin the car under hard braking. Typically on a nose heavy muscle car the front brakes will do about 2/3 of the braking and the rears will handle the other 1/3. That means the fronts need to have twice the brake force of the rears. So that is why the fronts have larger rotors and bigger calipers than the rear.
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Re: Brake routing 1970 charger wilwood
[Re: DAYCLONA]
#2580079
11/19/18 02:17 AM
11/19/18 02:17 AM
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Joined: Sep 2018
Posts: 257 NC
70charger512
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OP
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One of the big things I don't understand is the different valves/blocks. If I have 12.19" 4 piston brakes in front and 11" 4 pistons out back, do I need any kinds of valves or could I run straight lines since they're all disc and the front rotors are bigger? How exactly does this work? Generally when I do a 4 wheel disc set up, no proportioning valve, no distribution block, the rear line directly off the master, the fronts directly off the master with a tee downline to break left/right front, I generally bend/form my own stainless hard lines, you may need an adjustable proportioning valve for the rears if you haven't sized your F/R caliper piston size to create an ideal 60/40 F/R brake bias, worse case scenario I would allow before adding an adjustable PV is a 70/30 F/R bias FYI, I temporarily install 4 hydraulic gauges one at each line/caliper end when I create a system so that I know exactly what pressure/bias I'm creating, I strongly recommend installing gauges temporarily as you design your system, I use gauges rated to 2000 psi, needed esp on a power assisted system, you can tee the gauges and the bleeder screw directly into the bleeder ports on the calipers, bleed and test the system in one shot... Mike Wow thank you very much. Thats the most straight to the point answer i think anyones ever seen. I will most likely go the hydraulic gauge route too. If i dont what other way would i be able to find out braking bias? Theyre 12.19” rotors in the front and 11” in the back, all are 4 pistons.
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Re: Brake routing 1970 charger wilwood
[Re: Sinitro]
#2580080
11/19/18 02:18 AM
11/19/18 02:18 AM
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Joined: Sep 2018
Posts: 257 NC
70charger512
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NICK... My suggestion would be to call WilWood direct and talk to Mike Scully. Mike is head of tech support and can either answer your questions or connect U with the rite guy.. U might want to give him a break before calling as the fires were close by plus U got the Thanksgiving holiday this week. Just my $0.02... I definitely planned on doing that, especially about master cylinder specs for this setup (bore size, etc.).
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