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hi all. just wondering if theres a master that doesnt have a built in proportioning valve in it.

basicly i need to let more pressure go to the rears.

ive aftermarket calipers front and rear. and the front is working to hard. i want to instal a hydrolic bias valve instead of the factory one. to evan out the brakes.

any info apreciated. cheeres

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hi all. just wondering if theres a master that doesnt have a built in proportioning valve in it.

basicly i need to let more pressure go to the rears.

ive aftermarket calipers front and rear. and the front is working to hard. i want to instal a hydrolic bias valve instead of the factory one. to evan out the brakes.

any info apreciated. cheeres

thats right

sweet. thanks guys. yeah theres an alloy cap over it. i thought it was a press in plug. but as i was drilling it it fell off and revieled an 8mm hex screw :whistling:

but it will have to wait while i get new front discs again! i thermaly shocked them. big massive crack down one of them from over heating. uber gay!!!

so some nice alcons are going in. and lol i dont know where id be with out my weekend job at autobarn. coz this is turning quite expencive :P

  • 3 weeks later...

cool. quick update. the valve is removable but... with no valve there fluid pisses out the tiny little breather hole thats inbetween the outlets. ive got a s15 master that im gonna chop in half to see whats going on inside lol.

Front brakes working too hard ? I think that equates to rears not working hard enough .

When I was researching master cylinders for Skylines I did read that rear line proportioning valves were set differently for Z32's and 240 SX's . It may pay you to find out what our spec S14's and S15's are using and maybe substitute one of theirs . I did see somewhere that some S15's had a 1" BMC (should have BM57 stamped on the blind end) so if its bias is different (one would imagine an S15 would have substantially different front/rear weight balance) it may be the solution .

Cheers A .

Another update , whilst ratting 1st Gen Liberty bits for the RX I found that they use a Nabco 1" BMC with either 4 or 3 outlets and they appear to be a single cylinder body ie no proportioning valve . There are also available plugs so that any unused BMC outlets can be sealed safely . In the app I'm using cars could have 3 or 4 outlets so I went 4 to cover all the bases .

These Liberty BMC's have outlets facing down and towards the offside of the bay so the horizontal ones would be the ones to plug for a two line Nissan ABS type car .

I can't be totally certain these interchange with Skyline BMS's at the booster but the mounting system looks identical .

Cheers A .

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