Hi Jet,
Yep, I'm sorta aware of the problems with comparing the 2 probe types, but I'm not really after absolute numbers, more the delta, either over time, or due to changes in configurations.
The way I look at it, if I see the temps changing for no apparent reason, I MAY be able to find and or prevent damage to the engine.
And, even though they are in different locations and use different gauges, its nice to see a correlation between the 2 different probes on #4.
I really am confused as to why head 3 runs about the same as 1 and 2, while head 4 runs hotter - the probes are in the same relative position re airflow - I'm wondering if I can slightly increase the internal baffle size above #4 to push more air onto the head, but with my existing temps, I'm just focusing on airflow around the oil cooler atm.