Moparts

Wilwood brakes installed

Posted By: Otherlane

Wilwood brakes installed - 01/27/09 04:58 PM

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
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/27/09 05:05 PM

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
Posted By: WILD BILL

Re: Wilwood brakes installed - 01/27/09 05:17 PM

Posted By: Otherlane

Re: Wilwood brakes installed - 01/27/09 05:36 PM

Should I get the wilwood mopar style?
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/27/09 05:48 PM

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
Posted By: Moparteacher

Re: Wilwood brakes installed - 01/27/09 05:59 PM

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.
Posted By: fasthawk6

Re: Wilwood brakes installed - 01/27/09 10:35 PM

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.

Attached picture 4978011-picture_029[2](2).jpg
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/27/09 10:39 PM

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
Posted By: fasthawk6

Re: Wilwood brakes installed - 01/27/09 10:50 PM

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.

Attached picture 4978050-picture_029[2](2).jpg
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/27/09 11:25 PM

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
Posted By: fasthawk6

Re: Wilwood brakes installed - 01/27/09 11:27 PM

its the wilwood 4 wheel dics set up .

Attached picture 4978143-picture_029[2](2).jpg
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/27/09 11:35 PM

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
Posted By: fasthawk6

Re: Wilwood brakes installed - 01/27/09 11:39 PM

its a 4 piston ,

Attached picture 4978181-picture_029[2](2).jpg
Posted By: WILD BILL

Re: Wilwood brakes installed - 01/27/09 11:52 PM

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.
Posted By: smokinwoody

Re: Wilwood brakes installed - 01/27/09 11:55 PM

lets see some pics of these babies
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/28/09 12:02 AM

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
Posted By: Quicktree

Re: Wilwood brakes installed - 01/28/09 12:05 AM

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?
Posted By: fasthawk6

Re: Wilwood brakes installed - 01/28/09 12:14 AM

i am useing dot 3 due to directions it said no silicone and the 4 and 5 i found had silicone.

Attached picture 4978291-picture_029[2](2).jpg
Posted By: WILD BILL

Re: Wilwood brakes installed - 01/28/09 12:56 AM

I'm using a 1 1/8 master and Wilwoods brake fluid
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/28/09 01:07 AM

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
Posted By: midnight maniac

Re: Wilwood brakes installed - 01/28/09 02:38 AM

I am having the same problem with the first hit being soft then they pump up after that.Last year I did the wilwood up grade on all four wheels. I have the 4 piston setup all around. I am using the factory master cylender which I was told is 1 1/16". Wilwood told me this was suffice. My pads also look like the retract a little to far. I was wondering if you could use a residual or not with disc?
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/28/09 02:43 AM

It will hold some line pressure in the line, might
be enough so you dont have to hit the pedal a second
time to have it feel firm but you have to make sure
they are pulling back off of the rotor
Posted By: Lil Demon

Re: Wilwood brakes installed - 01/28/09 03:34 AM

You should have a 1-1/8" MC with aftermarket 4 wheel disc brakes. WW pistons going back too far, first pump on the pedal feels soft - hmmmm.............I wonder if they copied Aerospace's fully retractable piston design. I do not remember any older WWs having this issue.
Posted By: MR_P_BODY

Re: Wilwood brakes installed - 01/28/09 03:43 AM

Quote:

You should have a 1-1/8" MC with aftermarket 4 wheel disc brakes. WW pistons going back too far, first pump on the pedal feels soft - hmmmm.............I wonder if they copied Aerospace's fully retractable piston design. I do not remember any older WWs having this issue.




Bill is running the 1 1/8 master and he has the problem
also thats why I'm thinking they might be able to
use the residual valve
© 2024 Moparts Forums