Information only:
Bear in mind that results are for my NA, modded setup only
and I attempted to be a consistent as possible.
I tested with the stock IAT sensor and then with a 1/2 watt,
15K ohm resistor (giving a 60F reading) in its place. I expected
to see a richer air fuel mixture but was really looking for any
affects on spark advance.
The run with stock IAT sensor was done with ambient temp.
at 77F, 41% humidity. The one with the resistor was done
with 81F and 35% humidity conditions.
Comparing PW and O2 sensor readouts at near comparable
rpms and gears during the runs showed that there is
definitely a richer air fuel mixture at WOT with the resistor.
Example: at about 5050 rpm in 3rd, the one with the
sensor showed a 8.83ms PW and .86v on the lead O2 sensor
while the one with the resistor showed 9.42ms PW and .94v
O2 readings. Both showed 31 degrees advance.
Comparing spark advance readouts at near comparable rpms
and gears showed no significant difference in timing.
My time with the stock IAT sensor was 6/100s faster than the
time with the resistor.
I will keep testing to see if there any changes throughout
the track season.
Bob Tom Burlington, Ont., Canada
'97 CC Dakota, 5.2L, 4x2, 44RE, 3.92SG, 4,275 lb (racing weight)
RW: 231.2 hp 340.0 torque PB: 14.71 93.19 mph
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