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Discussion Starter #1
by id or od?

whats the od and id of 1/2 and 5/8 line?
 

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yea, airline is measured by OD, Outer Diameter

1/2" airline has a .376" ID, .001" greater than 3/8"
5/8" airline has a .441" ID, a lil bit more than 7/16", but not quite 1/2"
 

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Discussion Starter #4
i was wondering cause i was checking the parker site and it was talking id of the the regular 1/4 3/8 1/2 5/8 with decimal ods of greater. i was wondering how the heck you would order fittings with the screwed up non standard decimal sizes.

well the plan is 1/2 inch valves fill 3/8 dumps, 3/8s bags, 5/8s line , 2500 and 2600 back, digital gauges, 5 gallon tank. should be better with the v8 than 1.8 valves 3/8 line and 3 gallon tank, 1.4 ports. yet i wont complain that it was plenty fast with the v6 and would bototm the tubualr upper control arms.
 
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