Tech Question

[Prism]

I thought the general understanding is that whenever airflow increases so must fuel flow. Also, if everything effecting rpm remains unchanged (such as load, which is prop pitch in our case, weather etc,) then an increase in rpm means more power is being made. How then, when you compare two things being tested, can one need an increase in fuel flow,(meaning more power made) but deliver a decrease in RPM all other things being the same?? Anyone picking up what I'm putting down?

Prism

[porksword]

I guess Im not sure what we are talking about but yes, it is a general rule that more air requires more fuel which creates a bigger explosion in the combustion chamber, which makes more power. There are exceptions though, depending on what it is we are changing. For example, if the change you made created a less efficient atomization of the fuel, (like to large of injectors, or wrong fuel pressure, or if you are messing with the spark or different plugs which would also be a less efficient burn. So again it depends on what we are talking about.

[Prism]

"So a 30 rpm loss was noted with poorer (increased) fuel consumption using the ---- vs the stock set up." K.H.

[HopatcongGPR]

I thought the general understanding is that whenever airflow increases so must fuel flow. Also, if everything effecting rpm remains unchanged (such as load, which is prop pitch in our case, weather etc,) then an increase in rpm means more power is being made. How then, when you compare two things being tested, can one need an increase in fuel flow,(meaning more power made) but deliver a decrease in RPM all other things being the same?? Anyone picking up what I'm putting down?

Prism

there is a few explanations. experience the same issues over the years on my end.

efficiency, efficiency, efficiency......ill leave it at that...otherwise ill be here typing all night.

northern NJ?? where you at?? there is only a few lakes up here.

[Prism]

Efficiency it must be. Hop sent you a PM.