O2mv converted to AF ratio
10-08-2005, 09:28 AM
#2
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There is a relation but it varies hugely with O2
sensor / exhaust gas temp so no one formula
can work, unless you have the gas temp known.
Even on a single vehicle, thermal history makes
the relation look like a "smear" and is unreliable
from one pull to the next.
sensor / exhaust gas temp so no one formula
can work, unless you have the gas temp known.
Even on a single vehicle, thermal history makes
the relation look like a "smear" and is unreliable
from one pull to the next.
10-08-2005, 10:39 AM
#3
Here are a couple of charts I found a while back. Don't remember where I got them, but I know it was back when I was tuning the v6 for spray and a blower, so it would have been a couple of years ago.
The first one shows that a .87 o2 voltage could be a 10.2:1 or 13.2:1 or 14.2:1, depending on the exhaust temp.
With that said, typically these cars run good around .88-.90 na, if you need to rough it in for now.
The second chart just compares rich vs lean in relation to power and fuel economy.
The first one shows that a .87 o2 voltage could be a 10.2:1 or 13.2:1 or 14.2:1, depending on the exhaust temp.
With that said, typically these cars run good around .88-.90 na, if you need to rough it in for now.
The second chart just compares rich vs lean in relation to power and fuel economy.
