[Mr V]

Originally Posted by Mark McLeod

This is a repost, but it applies to the topic:

Here's a test that was run on the same system/same fully charged battery/different compressors.
System held pressure for 5 minutes after test.
Thomas 405ADC36/12 (from 2009 kit)
VIAir 90 (purchased through AndyMark)

Ambient temp: 68 degrees
Humidity: 50%
Altitude: 65ft above sea level
Volume (including hoses/tanks): 360 cubic inches
Battery voltage at start was 13.6v. During compression the voltage was ~12.4v (+/- .1v). At the end voltage was 13.02 for both.

-----------Thomas --------- VIAir
Time --- psi/temp ------ psi/temp
0 min ----- 0/68d ---------- 0/68d
1 min ---- 60/70d --------- 30/69d
2 min ---- 85/71d --------- 60/72d
3 min --- 110/74d --------- 80/73d
3:31 ---- 118/74d (cutoff)
4 min ----------------------- 100/83d
4:31 ------------------------ 118/85d (cutoff)
__________________

Note the Viair compressor is only rated for use with a 1 gal (231 cubic inches) while your test is with it filling a ~1.5 gal tank.

Where did you take those temp readings. The Viair has a head design that will be much more effective at pulling heat from the compression chamber and dissipating it. What was the temp of the heads say 1 min and 2 min after shut off?