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Proportioning valve on a SS

Posted: Thu May 06, 2004 4:10 pm
by NuwanD
Hi guys, I can easily locate the brake proportioning valve on my n/a 91, but on my SS it seems to be integrated with either the master cylinder or the abs unit. Does anyone know where it is?

I'm assuming it is located within or after the abs unit due to the criss cross braking circuits. If that is the case i'm assuming the pressure from both outlets on the master cylinder are identical to each other?

Thanks in advance! :D

Posted: Thu May 06, 2004 4:15 pm
by vrg3
It's mounted on the inboard side of the passenger side strut tower. Is that not the same place as on all BC/BFs?

Posted: Thu May 06, 2004 5:52 pm
by Legacy777
the prop valve should be in the same place for pretty much all newer subies.

the valves for abs & non-abs are different....but it should be in the same place.

Posted: Thu May 06, 2004 6:44 pm
by NuwanD
My fault, I didn't see it there last night as it was hiding under the strut bar and boost controller... I'm a dumbass :lol: thanks guys

Anyways, I yanked out that cracked abs unit. I could just reconnect the lines to each other but I don't like the fact that they take up some much needed space in front of the airbox (can use space for catch cans or water spray tank etc...) Ideally i'd like to redo the lines so they resemble the lines from a non-abs car;

ie: front~ from master cylinder directly to front brakes
rear~ from master cylinder to proportioning valve to rear brakes

Issues are that the abs equipped cars use a master cylinder with 2 outputs and the non-abs cars use a 4 outlet master cylinder which means that is gonna need changing as well. Are the piston diameters equal in both models of master cylinder?

I'm also playing with the idea of installing a manual brake bias controller while doing all of this, one which would be mounted inside the car.

I'm just thinking about all my options here, any suggestions are more than welcome...thanks :)