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Message
OK, I
think I've got it.
If you
had a boost gauge and a MAP gauge side by side, they'd always move in parallel.
They'd have to since they both have the same feed - right? Its just that the
scale on the MAP gauge includes 30 inches of hg, so to know you're boost
you'd have to subtract the pressure at you're height.
e.g. roughly
speaking boost PSI = (MAP - height
thousands)-30/2
MAP = 42 @ SL
= 6PSI
MAP = 48 @
10,000 = 4PSI
Does this
makes sense, or am I still missing something?
> If you have to be responsible for reading the
gauges full time ....
My voice annunciator and
an LED annunciator panel will let me know if any of 8 parameters get out of
line. I agree that a computer would be better, but I like to scan the overall
situation. Think of it this way - a scan of my gauges will tell me "everything
is good" wheras the digital engine monitor works the other way - ie "nothing is
wrong". I prefer the former. I'll get an EM3 when Tracy adds color
analog output in a couple of months. Either that or I'll save another couple of
k and get one of those analog EM systems... or another 10k + and get a Blue
Mountain EFIS......
Regards,
John
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