Auto A/C vacuum pump. lots of CFM or Less CFM whats best?? A/C tech's please help.

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RanchWelder

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I'm not perfect or feel the need to to be correct all the time.
I'm learning constantly.
Please teach me how what I wrote could be improper?
Not a physicist... not an engineer... just a human that cannot stand planned obsolescence.

Please test the cheap $89 ebait pump with a quality Winters or OTC Pressure Gauge before the return window runs out?

Mine came up short on a $390 Sonnex test bench at 5K ft.

You might want a proper filter on it, so the crumbs of aluminum from a cheapo vacuum, do not contaminate your A/C system or your transmission test bench.

What do I know?

My valves all tested good without leaks with less than 25 hg.
Improved nearly every valve and reamed for the extra diameter valve stroke bushings with the Sonnex kits.

Maybe I got ripped off.
 
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