what is the maximum continuous manifold pressure for any given aircraft?

Answer 1

For piston powered airplanes, the manifold pressure is measured in inches of mercury. A manifold pressure of 0 is a vacuum. A normally aspirated airplane engine at full throttle has a manifold pressure equal to the barometric pressure – about 30 or 31 inches at sea level and it decreases with altitude – toward that vacuum. Turbo-normalized engines generally max out at around 35 inches and airplanes like Piper Navajos with the big Lycoming turbo-charged engines have max pressures of around 45 inches. Supercharged old military airplanes and the old piston powered ‘big’ airplanes had a whole different world of even higher manifold pressure numbers.

Answer 2

I've seen maximum as high as 70 inches on some warbirds. The Piper Navajo red lines at 48 inches with a max continuous of 38 inches (although we usually operated it below that).

Most max continuous MPs are around 35 to 40 inches for boosted engines.

Answer 3

If it's a naturally aspirated engine, non-turbo, then 0. The throttle prevents induction, like throttling a person, you close off the wind pipe. That's why instruments can be vacuum driven. The engine sucks. At wide open throttle the vacuum is just the pressure drop along the induction tract.

Turbo charged engines develop boost instead, so you might have 15psi in the manifold.

(See what you get for answering in layman's terms?)

Answer 4

I have worked on old military gauges for supercharged engines, and those gauges can go has high as 200"/Hg absolute.

Answer 5

that depends on the type of induction system.. such as naturally aspirated.. turbo charged or supercharged.. i've worked r4360's with internal blowers and r2800's with 2 stage blowers .. so it depends on the application..