You want about 10 lb. residual pressure on drum brakes. This is not enough to overcome the return spring pressure. It keeps the wheel cyl. cups seated so as not to draw air when the brakes are released. Disc brakes you want no more then 2 lbs. There are no return springs.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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