MrPotatoHead wrote: ↑
Thu Nov 02, 2017 1:23 am
roon wrote: ↑
Wed Nov 01, 2017 9:19 pm
Do the engine test stands adjust their plenum pressure, or drop the pressure in the entire room? To simulate elevation.
Adjusting the plenum pressure would not simulate the different air density.
The only way to do it would be to lower the air pressure being fed to the turbo inlet. But that is troublesome because you have to lower the pressure but still maintain enough volume of air for the engine.
Does seem troublesome. I wonder if OEMs do anything like this. A large enough room and large enough vacuum pumps might suffice to balance what the engine is ingesting.