mushy pedal wilwood brakes

[$Mike70Z-28]

Hi i`m posting this problem for my buddy,he has a `70 Z28 just did his front and rear disc brake swap,got the Wilwood 4 piston calipers with cross drilled and slotted rotors,new wilwood master,new booster,new rear line kit from Precision brakes,new Wilwood proportioning valve,bled system but brake pedal feels mushy and when the brakes grab they grab real low on the pedal,any help and suggestions appreciated.

[baz67]

sounds like air in the lines

[silver69camaro]

I agree. Has to be air.

[$Mike70Z-28]

no air its been bleed 4 times

[$Mike70Z-28]

do you need bleed both top ports per caliper. the calipers have 4 2 at the top and 2 at the bottom

[alcino]

could be that the master cylinder is the wrong size. you want to bleed all of the top ports

[andrewb70]

do you need bleed both top ports per caliper. the calipers have 4 2 at the top and 2 at the bottom

Yes

Andrew

[funcars]

Could be the master isn't bled completely too. You can disconnect the lines and run tubes froom the brake line ports into the reservoirs and pump a bit to verify no bubbles are in the lines.

[RSX302]

Just because you bled 4 times doens't mean you got it all. Mine was a pain as well. I still have a little air in the rear thats screwing with me. Wilwood says to bleed the master back to itself first. If not, you keep pushing air into the system.
A Quick way to know if it air. If you pump the brakes and it gets better. or if you let it sit over night, does the first push go down to the floor? or more then usual. If so, Air is the culprit.

Oversized lines can be an issue also.

Otherwise I agree with the master.

Ron

[ZZ430]

Have you tried a gravity bleed?

[David Pozzi]

do you need bleed both top ports per caliper. the calipers have 4 2 at the top and 2 at the bottom

Yes! air rises, bleed at the top.

[Madspeed]

[quote=ronracer] A Quick way to know if its air. If you pump the brakes and it gets better. or if you let it sit over night, does the first push go down to the floor? or more then usual. If so, Air is the culprit.

^^^^^^
Not to be a knowitall but this description is not in fact air its adjustment issues
if you can pump a pedal up to the top then you are actually taking up the slack of loosley adjusted drum brakes or the possabillity that the pads are being sucked back into the calipers, or loose wheel bearings caliper mounts ect ect

air acts spongy and cannot be pumped up

I mean you no Disrespect as your car iz da SHIZZLLE

[Madspeed]

Oh and for crap sakes get this cheap tool you wont regret it

Its an air operated one man brake bleeding system no self respecting car entusiest should be without. =)

http://www.harborfreight.com/cpi/cta...emnumber=92924

thier picture is horrible but it is basicly the same thing I got off a snap on truck

[parsonsj]

Or this:

http://www.motiveproducts.com/02bleeders.html

I bled my brakes from brand new, no fluid whatever. It took 30 minutes, and no helper needed. It works!

jp

[RSX302]

Not to be a knowitall but this description is not in fact air its adjustment issues
if you can pump a pedal up to the top then you are actually taking up the slack of loosley adjusted drum brakes or the possabillity that the pads are being sucked back into the calipers, or loose wheel bearings caliper mounts ect ect

air acts spongy and cannot be pumped up

I mean you no Disrespect as your car iz da SHIZZLLE

Yea that would be a correct statement if we were talkin about drums. Since he just installed Wilwood 4 piston disc's all around, that doesn't apply here.

Now I think you have something by stating the pads getting sucked back into the calipers? Master Cylinder Issues?

Oh and thx Snoop!