Bob,
See if you can test them again but at closer to "like" temperatures. Also, if
you can log what the PCM is doing under WOT and normal cruising, you will see a
slight difference.
Good info though...(why the 1/2W?? 1/4W works.) ;)
- Bernd
> 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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