# anybody charge ac on the side?

**URL:** <https://forums.speedlife.net/t/anybody-charge-ac-on-the-side/264180>\
**Category:** Shift518 Automotive\
**Created:** [June 23, 2012, 11:55am UTC](https://forums.speedlife.net/t/anybody-charge-ac-on-the-side/264180 "2012-06-23T11:55:49Z")\
**Posts on this page:** 1\
**Showing post:** 47

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**Author:** ![DannyboyUpstate](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dannyboyupstate/32/6313_2.png) [@DannyboyUpstate](https://forums.speedlife.net/u/DannyboyUpstate)\
**Post date:** [June 25, 2012, 5:02pm UTC](https://forums.speedlife.net/t/anybody-charge-ac-on-the-side/264180/47 "2012-06-25T17:02:58Z")

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> [@Official "sightings" thread](https://forums.speedlife.net/t/official-sightings-thread/53153/67):
>
> [quote=DannyboyUpstate;975819]28 in/hg is not deep enough to eliminate all moisture at 70degF.
> 
> That’s what GM specs for their systems with a 3 minute hold time and we have very few component failures.

Well the bottom line is that is not deep enough. Check out this chart:

If you only go to 28 in/hg you can see there could still be moisture in the system as long as the air temperature is under 86degF. What’s more important, is that this chart shows you that reading vacuum levels with a bourdon tube type gauge is not accurate enough. You need a gauge that reads microns. Either a thermistor or transducer type device.

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