Quote:
Originally Posted by dkveuro
Single stage commercial . Have calibrated gauge and at 1100 asl I see 29 inches. If you hold 29 for some time and run the engine to full temperature you can be sure that whatever minute amount of water vapor is in the system is absorbed by the desiccant....or so small a volume it will not ice anywhere..
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Would you know if I run two vacuum pumps in series, would I be able to achieve lower vacuum levels than a single pump? I can rent (free) a single stage pump from Autozone, I can scrounge up a compressor from a house AC unit and run that in series.
I need to come up with some kind of digital vacuum gauge. They seem to start at $140 and up. This one reads in microns
https://www.amazon.com/CPS-VG200-Digital-Vacuum-gauge/dp/B009AXGCSC?ie=UTF8&redirect=true&tag=gols-20
I don't care the units used. I can convert them
Vacuum Pressure - Units Converter
I am buying one of these to play with, $20 shipped
New SMC RS Vacuum Pressure Switch ZSE4B 01 26 Q | eBay
readouts in kPa, mm HG, psi and bar