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Wilwood brakes installed #205781
01/27/09 12:58 PM
01/27/09 12:58 PM
Joined: Dec 2007
Posts: 830
east coast
Otherlane Offline OP
super stock
Otherlane  Offline OP
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Posts: 830
east coast
I just finished installing new front and rear wilwood disc brakes,what should I upgrade now or add now? I still have the factory master cyl

Re: Wilwood brakes installed [Re: Otherlane] #205782
01/27/09 01:05 PM
01/27/09 01:05 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

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Posts: 52,972
Romeo MI
Quote:

I just finished installing new front and rear wilwood disc brakes,what should I upgrade now or add now? I still have the factory master cyl




You might be looking at a master cyl also, the disc
caliper has a bigger piston over the small wheel
cyl

Re: Wilwood brakes installed [Re: MR_P_BODY] #205783
01/27/09 01:17 PM
01/27/09 01:17 PM
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL Offline
Senior Member of the Junior Dragster Club
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BROOK PARK, OH

Re: Wilwood brakes installed [Re: WILD BILL] #205784
01/27/09 01:36 PM
01/27/09 01:36 PM
Joined: Dec 2007
Posts: 830
east coast
Otherlane Offline OP
super stock
Otherlane  Offline OP
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east coast
Should I get the wilwood mopar style?

Re: Wilwood brakes installed [Re: Otherlane] #205785
01/27/09 01:48 PM
01/27/09 01:48 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
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Master

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Posts: 52,972
Romeo MI
Quote:

Should I get the wilwood mopar style?




If your talking the alum master, I would say yes, but
you might want to talk with Wilwood to what diameter
bore you need based on the set up you have and your
pedal ratio

Re: Wilwood brakes installed [Re: Otherlane] #205786
01/27/09 01:59 PM
01/27/09 01:59 PM
Joined: Jul 2008
Posts: 607
Boise
M
Moparteacher Offline
mopar
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Boise
Many factory master cylinders have a residual valve under the line seat for drum brakes. The residual valve keeps a small amount of line pressure to prevent the wheel cylinder from sucking in air upon release of the brake pedal. If the residual valve is present and residual pressure exist then it will keep your disc brake caliper partially engaged, burning up the pads and rotor.

You can remove the valve by removing the brass seat with a wood screw and reinstalling it without the valve, or you can replace the master cylinder with a unit without residual valves.

The relative size of the primary and secondary pistons in the master cylinder to the size of the caliper piston will determine pedal effort and travel. A relatively smaller diameter master cylinder will require less pedal effort but more pedal travel.

Re: Wilwood brakes installed [Re: Moparteacher] #205787
01/27/09 06:35 PM
01/27/09 06:35 PM
Joined: Mar 2005
Posts: 331
Cincinnati Oh
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fasthawk6 Offline
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Cincinnati Oh
i just got done installing the same setup got rid of all factory stuff.got the m/c from doctor diff & installed a sbcc adjustable porportioning valve.i also have a ? about a first long stroke when you hit the brakes, after the first stroke brakes feel fine,is this normal.

Re: Wilwood brakes installed [Re: fasthawk6] #205788
01/27/09 06:39 PM
01/27/09 06:39 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
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Romeo MI
Quote:

i just got done installing the same setup got rid of all factory stuff.got the m/c from doctor diff & installed a sbcc adjustable porportioning valve.i also have a ? about a first long stroke when you hit the brakes, after the first stroke brakes feel fine,is this normal.




No thats not normal, you need a larger bore master
to move more fluid..... if your system IS fully bled

Re: Wilwood brakes installed [Re: MR_P_BODY] #205789
01/27/09 06:50 PM
01/27/09 06:50 PM
Joined: Mar 2005
Posts: 331
Cincinnati Oh
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fasthawk6 Offline
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Cincinnati Oh
bought a 1 1/32 m/c from doctor diff bleed brakes early today between sholving snow, went back to garage and found some leaks so i am going to bleed again tomorrow after more sholving.do you think the 1 1/32 is big enough.

Re: Wilwood brakes installed [Re: fasthawk6] #205790
01/27/09 07:25 PM
01/27/09 07:25 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
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Master

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Romeo MI
Quote:

bought a 1 1/32 m/c from doctor diff bleed brakes early today between sholving snow, went back to garage and found some leaks so i am going to bleed again tomorrow after more sholving.do you think the 1 1/32 is big enough.




I dont know your system but most likely it will be.
Make sure you dont have any leaks and bleed it good

Re: Wilwood brakes installed [Re: MR_P_BODY] #205791
01/27/09 07:27 PM
01/27/09 07:27 PM
Joined: Mar 2005
Posts: 331
Cincinnati Oh
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fasthawk6 Offline
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Cincinnati Oh
its the wilwood 4 wheel dics set up .

Re: Wilwood brakes installed [Re: fasthawk6] #205792
01/27/09 07:35 PM
01/27/09 07:35 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
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Master

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Posts: 52,972
Romeo MI
Quote:

its the wilwood 4 wheel dics set up .




That doesnt mean much to me, is it a dual piston
or single per caliper whats the area per piston, you
can see that its not all that easy to say yes or no.
Bleed it and see, a large bore master will give you
a short pedal travel but give you a real hard pedal.
A smaller bore will give you more travel and a easier
pedal effort

Re: Wilwood brakes installed [Re: MR_P_BODY] #205793
01/27/09 07:39 PM
01/27/09 07:39 PM
Joined: Mar 2005
Posts: 331
Cincinnati Oh
F
fasthawk6 Offline
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Cincinnati Oh
its a 4 piston ,

Re: Wilwood brakes installed [Re: fasthawk6] #205794
01/27/09 07:52 PM
01/27/09 07:52 PM
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL Offline
Senior Member of the Junior Dragster Club
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BROOK PARK, OH
I have a similar "feel" with the first hit on mine. I noticed the last time I has the wheels of the there was quit a gap between the pads and rotors when they aren't applied. I've bleed the living daylights out of them so I know it's not air in the lines. It has to be the first pump takeing up the "gap". At least that's what I think is going on with mine.

Re: Wilwood brakes installed [Re: Otherlane] #205795
01/27/09 07:55 PM
01/27/09 07:55 PM
Joined: Apr 2004
Posts: 12,339
somwhere
S
smokinwoody Offline
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Posts: 12,339
somwhere
lets see some pics of these babies

Re: Wilwood brakes installed [Re: WILD BILL] #205796
01/27/09 08:02 PM
01/27/09 08:02 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

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Posts: 52,972
Romeo MI
Quote:

I have a similar "feel" with the first hit on mine. I noticed the last time I has the wheels of the there was quit a gap between the pads and rotors when they aren't applied. I've bleed the living daylights out of them so I know it's not air in the lines. It has to be the first pump takeing up the "gap". At least that's what I think is going on with mine.




Bill that when the big bore comes into play, the
pistons will/should roll back all the way everytime,
and with the big bore you move more fluid with a
single stroke. Whats the bore on your master

Re: Wilwood brakes installed [Re: WILD BILL] #205797
01/27/09 08:05 PM
01/27/09 08:05 PM
Joined: Jan 2003
Posts: 32,394
Q
Quicktree Offline
I Win
Quicktree  Offline
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Q

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Posts: 32,394
Quote:

I have a similar "feel" with the first hit on mine. I noticed the last time I has the wheels of the there was quit a gap between the pads and rotors when they aren't applied. I've bleed the living daylights out of them so I know it's not air in the lines. It has to be the first pump takeing up the "gap". At least that's what I think is going on with mine.




what kind of fluid are you using?

Re: Wilwood brakes installed [Re: Quicktree] #205798
01/27/09 08:14 PM
01/27/09 08:14 PM
Joined: Mar 2005
Posts: 331
Cincinnati Oh
F
fasthawk6 Offline
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Cincinnati Oh
i am useing dot 3 due to directions it said no silicone and the 4 and 5 i found had silicone.

Re: Wilwood brakes installed [Re: fasthawk6] #205799
01/27/09 08:56 PM
01/27/09 08:56 PM
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL Offline
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BROOK PARK, OH
I'm using a 1 1/8 master and Wilwoods brake fluid

Re: Wilwood brakes installed [Re: WILD BILL] #205800
01/27/09 09:07 PM
01/27/09 09:07 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
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Master

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Posts: 52,972
Romeo MI
Quote:

I'm using a 1 1/8 master and Wilwoods brake fluid




That 1 1/8 should be fine, do you know your pedal
ratio
EDIT
You could put in a 2psi residual valve, this wouldnt
let them return all the way

Last edited by MR_P_BODY; 01/27/09 09:10 PM.
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