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Proportioning valve for disk conversion ?

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STANIMAL View Drop Down
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    Posted: Mar/14/2019 at 7:41pm
I converted my 73 hornet to disks with the Scarebird parts and updated the master . The front right seems to lock up with relative ease and then the left . 

 Is there a metering valve or proportioning valve that needs to be replaced or installed ? Did I miss something ? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mixed up Quote  Post ReplyReply Direct Link To This Post Posted: Mar/14/2019 at 10:00pm
you can always buy a adjustable proportioning valve from summit  
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nickleone View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote nickleone Quote  Post ReplyReply Direct Link To This Post Posted: Mar/14/2019 at 10:29pm
Proportioning valves will not cure that front lockup.
Check the calipers to see if they are backing off when the pedal is released.
Did you get a DISC/Drum new master?
If it is not a DISC/DRUM master look for a residual pressure valve in the master for the front brakes, Remove the residual pressure valve to the front brakes.
Also check push rod length it may be keeping pressure on the front brakes if it is too long.

Nick



Edited by nickleone - Mar/14/2019 at 10:33pm
nick
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tomj Quote  Post ReplyReply Direct Link To This Post Posted: Mar/15/2019 at 10:08pm
one side (left or right) locking up or braking unevenly also is not a proportioning thing, it's a brake problem.

is it driveable reasonably safely? does one caliper get hot and the other not?

jacked up, does each wheel spin freely, just a tiny bit of scuff?

look for shiny metal where it don't belong...

proportioning front/rear is solely for the case where the rears lock up before the front. it's more easily and simply adjusted by putting smaller bore wheel cylinders in the rear. 

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