On the last quiz we discussed about upper deck and lower deck pressure on the intake system of a turbocharged engine. Now here's something a little more challenging 
... What is the relationship between a fuel injector nozzle and upper and lower deck pressure? which deck pressure is it usually located in? and why? Good luck! 
Good question! However, I believe, if memory serves me correctly, a fuel injection system, direct into the cylinders, has a metering device, not a carburetor, so the upper and lower deck pressures would be not be a factor. Example, on a Cessna 421 with TSIO-540 engines, if the blowers were hardy enough, you could climb much higher than the service ceiling listed in the POH, but the limiting factor is now the amount of air which can be introduced into the cylinders.
