flyrotary@lancaironline.net Mailing List Archive

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I remember Rusty saying he wanted a boost gauge that showed vacuum. I'm about to order a boost gauge and I'm unsure what calibration I'm going to need. Do I need vacuum? Should I be looking for a MP gauge calibrated in inches of mg, or in PSI. Does it matter?

Hi John. I won't argue with what Marvin said (or he'll throw me off the list <g>). If I could only have one gauge, it would certainly be a MAP gauge, in inches of hg. I'll have that with the EM-2, in only a matter of a couple weeks now (he says while salivating on the keyboard).

I would get a gauge that goes up to at least 40", especially if you still plan to use the stock turbo. From everything I can tell, you'll need that much boost to break even with the stock turbo.

If you can have two gauges, it's useful to have a "normal" (for car folks) vacuum/pressure gauge. This shows you how much work the turbo is doing relative to the pressure outside. Now, it isn't essential, because you can figure all this out without it, but it's nice to be able to directly read this info off a gauge. I'll certainly be keeping my vacuum/pressure gauge even after the EM-2 is installed. I won't really have a use for the vacuum part of the gauge then, but there's no point in having the needle sit against the stop, when it could be showing real information.

Anyone getting an EM2 want to sell me their used stuff?

I can't believe you bailed on the EM-2. I'm number one then I guess :-) Sorry, but I'm planning to keep my current "temporary" gauges, since I'll likely be pursuing a single rotor project in the near future. I sure would like to win the lottery so I'd have time for all these projects :-)

Rusty

PS- John, I won't be coming to Delray this week after all.