Rear Brakes

PeeJay · Post by **PeeJay** » Sun Feb 19, 2006 12:01 pm

Hi all,

Recently when I did my EJ conversion on my RX Turbo, I also added in the booster, master cylinder and abs unit from the legacy halfcut. I also removed the hill holder.

My brakes work better now than they did before (they even passed the rego check), but my back brakes are almost doing nothing. If I drive along a dirt road, throw the car sideways and slam the brakes on as hard as they go I still can't get the rears to lock.

I didn't install the lib proportioning valve as I was under the impression that my car already had one, but should I perhaps swap my current one for the lib one?

I know it's not a problem with rear brakes themselves because they used to work fine before the changeover.

steve_rising_sun · Post by **steve_rising_sun** » Mon Feb 20, 2006 6:57 pm

You have fitted the ABS to the rear as well? It should not lock up.
Steve

PeeJay · Post by **PeeJay** » Wed Feb 22, 2006 9:24 am

I've fitted the ABS Hydrolic unit but none of the electrical stuff is connected. I've got all the lines hooked up the same as in the front cut, with the exception of the proportioning valve which is stock RX turbo.
I can see by the shinyness on the rear disks that not much pressure is being applied to them. As you can imagine driving on a dirt road with mostly front brakes is asking for an accident! 8O

fredsub · Post by **fredsub** » Wed Feb 22, 2006 9:42 am

just ideas...
how would you test that the abs valves are fully open (i guess? or closed?) because I gather that abs has been sitting around a while until now?

maybe give it a shot of powering it up? to loosen things....i know i know, an inoperative abs unit is not supposed to effect brake action...but something is going on isn't it?

PeeJay · Post by **PeeJay** » Wed Feb 22, 2006 9:50 am

Yeah, I've played with the valves and the pump on the ABS to try and get an idea of how it works for my traction control but it's made no difference.

I'm thinking that the proportioning valves for the Lib and the RX must be set to very different rates. I'm going to try taking it off and see what happens, and I guess replace it with the lib one. Hope I can find some room for it!