Front disc brake conversion
Hopefully you guys can help me with an issue. Just replace the upper and lower control arms with new front springs. Also was able to score a disc brake conversion from a 66 Chevelle. Everything bolted on correctly. The items I purchased Included the master cylinder but without the proportioning valve and booster. I still have the rear drum brakes. Which I refreshed with new shoes springs and drums. Got a proportioning valve from C PP . The booster I purchased from Summit. Hopefully this is enough background for you to answer my question.
I can’t seem to get the adjustment on the rear brakes to the point where they will not lock up . Seems to not lock up if I’m fairly easy on the brake. If I put the slightest increased pressure like a hard stop the rear brakes will lock up.
A friend of mine from a local restoration shop told me they never put a combination proportioning valve on their brake conversions. They simply run the front reservoir to the front brakes and put an adjustable proportioning valve to the rear brakes. I’m not questioning their procedure but my question is why do all these kits out there have a combination proportioning valve for the brake conversion. I’m wondering if I have something wrong with the mechanical issue on the rear brakes, adjusted too tight, emergency brake adjustment or some other mechanical issue. I do not have any gauges to check the pressure to the front and rear. I’m wondering if I have a defective combination proportioning valve where it is not centered. I’m sure there’s many reasons why my brakes are locking up on the rear. But I would like to get some input from all you guys. Thanks for any help.