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I just got me a test subject to watch the gauges as I rev it.
At 2000 I’m getting:
26-27 low side when the evap is at 6C
High side the gauges say 285 give or take however ISTA measures 18.5 bar to 19 which is 270-275 maybe it’s reading a bit low (harbor freight)
I just tried spraying water for a bit through the grilles. Result was a refrigerant pressure drop from 16.5 (240psi on ISTA) to 11 bar (160psi) . A 1C drop in evap temperature and 1 in footwell and interior aswell. Now it’s holding at around 13 bar (190-200psi) after revving and idling without water and evap holding at 6-7.
Also my battery seems a bit lower but I had been toying with coding out features so not fully charged. Now at 13.8v
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Airplane Mechanic
BMW Masochist
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