Read from hpa academy that afrs are different from inches away from turbine, and test pipe.

AEM says within 36" away for turbo, idk if because that's still accurate, or they don't want people complaining about service life.

Would it be richer or leaner farther away?

Hpa states because of pressure differences, it needs to be close for accuracy.
I know it's just an average of all the cylinders but would like to know what some of the knowledgeable people on here think about it. Because on the EVOs it's literally inches on downpipe flange on the turbo.
Thanks all!