68 camaro proportioning valve (combination valve)HELP?

[Sieg]

Chassis line from master to drop down is 1/4" and 3/16" line from the drop down to calipers is OEM spec?

[GregWeld]

Originally Posted by Sieg

Chassis line from master to drop down is 1/4" and 3/16" line from the drop down to calipers is OEM spec?

Some OEM ABS systems combine the use of 1/4 and 3/16" in the same system. I researched this question for a couple hours and could find nothing definitive to explain the "recommendation" of 3/16" over 1/4" in this closed system. The volume difference - even if you calc'd all the line length and diameters is negligible and the PRESSURES would be the same in both line sizes.

[Vince@Meanstreets]

Originally Posted by GregWeld

Some OEM ABS systems combine the use of 1/4 and 3/16" in the same system. I researched this question for a couple hours and could find nothing definitive to explain the "recommendation" of 3/16" over 1/4" in this closed system. The volume difference - even if you calc'd all the line length and diameters is negligible and the PRESSURES would be the same in both line sizes.

3/16" tubing is lighter due to material and fluid capacity and easier to package and and form. lighter = faster