rear disc brake conversion.

[steroidchickens]

OK, help needed.

recently converted F series drums to r31 skyline discs.
new parts include:
new pads
new rotors
all braided lines
new recoed calipers.


problem being, as soon as i bleed the system thge rear brakes still have pressure in the lines. so the rear calipers are sort of locked on. the car is still drivable but cannot push it.

originally i thaught it was the brake proportionaling (spelling???) valve attached the the right hand strut tower so have biapassed that with a joiner. and same problem.

car is running hydrolic handbrake only (no cables connected)

and RB20 master.


when i had the drums it was fine. all i have changed since is the discs and braided lines.



need help urgent got to leave for QLD thursday!! :confused:

[slydar]

caliper alignment?

[steroidchickens]

they are fine until i bleed them.

narrowed it down to the calipers but.

will find out tomorrow.

[Javal]

It's your brakes.

They're doing it wrong.

[federal]

...

[dustyae86]

tried pushing the piston back out again to see if the fluid id moving it back etc

[Todd]

<div class='quotetop'>QUOTE (dustyae86 @ Apr 7 2008, 07:38 AM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=514321)</div>
tried pushing the piston back out again to see if the fluid id moving it back etc[/b]


yes and it does not go back to the master.

turns out to be the calipers.

R31 calipers do not like hydrolic handbrakes. because of the manual handbrake mechanism
built in to the piston.

purchised some VS commodore calipers today. same bolt pattern and no handbrake as the
handbrake is like a drum style on on these cars. just about to install them.

[steroidchickens]

VS commodore calipers FTW, problem solved.

stupid skyline shit. :rolleyes:

[slydar]

haha lol datsun, out done even by holden..

oh wait your motor..

haha just joking.

[steroidchickens]

<div class='quotetop'>QUOTE (slydar @ Apr 7 2008, 08:07 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=514740)</div>
haha lol datsun, out done even by holden..

oh wait your motor..

haha just joking.[/b]

so what you saying, another conversion........ 3.8 ecotech all the way. :whistling:

[ae71neo]

Buy my car for the conversion! :P

[slydar]

<div class='quotetop'>QUOTE (steroidchickens @ Apr 7 2008, 08:08 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=514741)</div>
so what you saying, another conversion........ 3.8 ecotech all the way. :whistling:[/b]



yeah you definitely wanna stay pre quad cam, that shit is wack.

[JDMJNKY]

haha this is funy i had the exact same problem when i did my f series disc conversion, i used ae86 jdm calipers on the pedal brake and r31 calipers on the hydraulic handbrake and 31 rotors worked fine till i hit the track, had to dissasemble the calipers at the track, removed one of the pieces that operates the manual handbrake mechanism and problem solvered.

then as i fix the problem about 20 people say why didnt you just use vs rear calipers aaaah why didnt some one tell me that before haha!!

[steroidchickens]

<div class='quotetop'>QUOTE (orangechargd86 @ Apr 8 2008, 07:46 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=515259)</div>
haha this is funy i had the exact same problem when i did my f series disc conversion, i used ae86 jdm calipers on the pedal brake and r31 calipers on the hydraulic handbrake and 31 rotors worked fine till i hit the track, had to dissasemble the calipers at the track, removed one of the pieces that operates the manual handbrake mechanism and problem solvered.

then as i fix the problem about 20 people say why didnt you just use vs rear calipers aaaah why didnt some one tell me that before haha!![/b]


haha, funny that. i purchised some recoed calipers and everything. ended up getting some second hand commodore calipers from the wreckers second time round :confused:



so you are running 2 calipers? one for handbrake and one for footbrake. was going to do this mod in the near future.