Please take a look at my gauge readings . Duct temperature 38-42.
My low side seems a little higher.
It was 85degrees today with 70 % humidity
https://youtu.be/J7go7-uqFMM. (at 1:11 the system changes)
Vintage air specs:
Target Pressures and Temperatures
If your system is properly charged, you should see the following metrics under steady-state operation:
Low-side pressure: 10 to 20 PSI .
High-side pressure: 160 to 270 PSI (General rule of thumb is 2 × ambient daytime temperature, plus 15 to 20%).
Center duct temperature: Should blow cold at 36°F to 46°F
Charging vintage air system ?
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JohnHere
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Re: Charging vintage air system ?
In the video of your Manifold Gauge Set, it sounds to me like the engine is idling. If so, bump-up the engine speed to about 1,800 RPM, and retest the pressures. Otherwise, according to the Vintage Air specs, the system appears to be fully charged and operating normally.
Member – MACS (Mobile Air Climate Systems Association)
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Re: Charging vintage air system ?
If 38-42F, why are you complaining ???
Re: Charging vintage air system ?
You are correct it was idling probably around 1000 RPM. I will redo the test.JohnHere wrote: Sun Jul 05, 2026 8:06 pm In the video of your Manifold Gauge Set, it sounds to me like the engine is idling. If so, bump-up the engine speed to about 1,800 RPM, and retest the pressures. Otherwise, according to the Vintage Air specs, the system appears to be fully charged and operating normally.