Induction negative pressure calculation

[ToughBirds]

Can someone direct me to a method of calculating the negative pressure experienced by an induction air hose that is connected between the air filter and intake manifold?

In most small aircraft, the hose used to connect the air filter housing to the engine air intake is SCAT, SCEET, CEET, or CAT. However, none of those is recommended for negative pressure applications. So, I'm looking for a hose that is rated for that application, but I can't find a reference to how much negative pressure is found inside that hose.

I will cross-post this to the aerospace forum as well.

 

[ivymike]

upstream of the throttle? just calculate your filter restriction at max rpm WOT.

 

[patprimmer]

Like ivymike says.

Unless you have a really poorly designed filter or a very dirty filter, the depression will be almost zero.

Downstream of the throttle is another matter altogether

Regards

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