Topic: Wideband AFR gauge suggestions

[Gnarly4X]

...   A jet with 10% less area should be 10% leaner.   

Hi emsvitil,

Good thinking….

Yes, this would be true IF the measurement was taken with a static constant air flow.  Remember the AFR is a ratio of fuel and air.  The amount air changes with CFM and velocity. 

Also, reducing a jet size changes the velocity of fuel through the hole (Bernoulli's equation). Since atomization is critical in the measurement of AFR, if you increase or decrease the velocity of fuel the atomization rate changes. 

Sorry… I had to spray a little stink on this. 

Gnarls.... 

[H8PVMNT]

Here is the pod I made for the AF and vac gauges.  Nice lean cruise just into the primary...