Running Pure Meth - Use UEGO as failsafe?

[Richard L]

That is a much sensible approach, monitoring a location where you have reached a full capacity. You basically monitor one point, hardign wourth getting a guage. You can get a flow switch at much lower cost and achieve the same result.

This method will only work if you have a progressive boost only system. But beware the afr will be different under different gears.