Has anyone tried an external EGT probe? If they can be calibrated correctly, this would avoid the hole in the exhaust pipe, which seems like a good thing™.
Here is one example:
http://thesensorconnection.com/egt-...st-manifold-or-pipe-surface-temperature-probe
Here is one example:
http://thesensorconnection.com/egt-...st-manifold-or-pipe-surface-temperature-probe