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Old 07-11-2019, 10:09 AM   #5
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Join Date: Jul 2018
Location: Texas

Originally Posted by JohnMc View Post
You are overthinking it.

I don't think the flow velocity alters the sensor reading in any appreciable manner. If it did, they'd read differently at idle vs. WOT. Or different if you replaced a 2" DP with a 3" DP.
I'm probably overthinking it.

BUT in this example the velocity wouldn't alter the reading of the first sensor, because the density of the mixture going in is uniform. But the sensor behind it might experience a low pressure situation, kind of like your car behind a 18-wheeler on the highway. The reduced pressure makes it seems as if there's *less* air, so the sensor in the rear position might read less O2 than there actually is, because of the low pressure vortex.

But yeah I'm probably just overthinking it. It's my job, OK?
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