[Super73]

I trust the wideband as far as AFR goes. I varified mine was accurate with in a given % against a very expensive one on the dyno.

As far as heat range goes, it seems as though the feeling once was to run a hotter plug do to the ethenol. But now it seems as though that idea has diminished and people are reverting back to a more traditional plug temp for Ethenol blends. From what I am understanding, a glow plug is a glow plug, and can't really be good for anything but a diesel fuel at start up.

I am sure there will be a learning curve here, but I can't see a colder plug being a bad thing. Right now, the heat mark is pretty far from where I'd like it to be.

I am less worried about the white lean look on the tip since I know my part throttle is set a little lean (on purpose). Where I need to look is way down in the plug and see what it tells me for WOT, but I can't do that with a street driven plug. I will do that at the track.



If there are others here that run Ethonal Blends (48-85% Ethonal) please let me know what your take is. Thanks