Title: spongy brake pedal
Post by: rx7veilside on March 12, 2005, 08:45:14 AM
Post by: rx7veilside on March 12, 2005, 08:45:14 AM
brakes didnt seem to bite well so have replaced front discs/calipers and master cylinder stainless hoses and bled system but brakes stop the car well but pedal still seems spongy..any suggestions please
ie still air in system has bled alot of fluid
abs unit not working properly in some way??
servo unit faulty
have checked all other hoses and all are good
brakes are ap 4pots
rear calipers not seized either
any ideas please
ie still air in system has bled alot of fluid
abs unit not working properly in some way??
servo unit faulty
have checked all other hoses and all are good
brakes are ap 4pots
rear calipers not seized either
any ideas please
Title: spongy brake pedal
Post by: rx jamie on March 12, 2005, 11:22:42 AM
Post by: rx jamie on March 12, 2005, 11:22:42 AM
got the same problem mate. brakes work **** hot but feel ****e
Title: spongy brake pedal
Post by: rx7veilside on March 12, 2005, 07:04:29 PM
Post by: rx7veilside on March 12, 2005, 07:04:29 PM
jamie are u running standard brakes or uprated
Title: spongy brake pedal
Post by: Jin Kazama on March 12, 2005, 08:20:38 PM
Post by: Jin Kazama on March 12, 2005, 08:20:38 PM
It sounds like like u need a higher dot fluid eg. 5.1
Title: spongy brake pedal
Post by: rx7veilside on March 12, 2005, 09:04:13 PM
Post by: rx7veilside on March 12, 2005, 09:04:13 PM
jim geff only recomends dot 3 and it isnt when u have been using brakes a lot it is the same whether brakes are warm or cold
Title: spongy brake pedal
Post by: Jin Kazama on March 12, 2005, 09:17:41 PM
Post by: Jin Kazama on March 12, 2005, 09:17:41 PM
As u have uprated your master cylinder, hoses, checked the servos and bled the system you have eliminated everything else. the only thing i can see it being is the fluid compressing too much. perhaps there\'s moisture getting in somewhere.
Title: spongy brake pedal
Post by: MikeLMR on March 13, 2005, 11:47:37 AM
Post by: MikeLMR on March 13, 2005, 11:47:37 AM
are those calipers standard ones ? (if so they aren\'t made by AP) if they aren\'t your pedal could just be due to the increased amount of brake fluid that needs to be moved due to large pistons in the uprated brakes. The relationship between master cylinder area and slave cylinder(s) area is often overlooked with brake upgrades.
Title: spongy brake pedal
Post by: rx7veilside on March 13, 2005, 01:26:25 PM
Post by: rx7veilside on March 13, 2005, 01:26:25 PM
they are replacement ap 4 pots not standard
Title: spongy brake pedal
Post by: rx jamie on March 13, 2005, 07:12:46 PM
Post by: rx jamie on March 13, 2005, 07:12:46 PM
only upgrade is red stuff pads on mine.
Title: spongy brake pedal
Post by: scooby_si on March 16, 2005, 07:08:53 AM
Post by: scooby_si on March 16, 2005, 07:08:53 AM
not got a good rep amongst the rotary folks & many would class that as a downgrade i\'d think about changing those pads.....
Think it was mainly relating to warping discs off the top of my head....But i know generally EBC are seen as the cheap versions on most car boards...
Si
Think it was mainly relating to warping discs off the top of my head....But i know generally EBC are seen as the cheap versions on most car boards...
Si