On my blown tacoma it was recommended to run 2 steps cooler plugs to prevent aiding knock or preignition. Hotter plugs would make this more likely, but be clean. Cooler plugs are more likely to foul.
Maybe I have it backwards? I see -11 to -19 timing under acceleration, that just doesnt seem right unless my sg2 likes to randomly show the - sign. Under light load in what seems like "lean burn" I see 35 degrees of timing. As you start to load up the engine the timing checks out.
lol i could be wrong about it or have it backward myself we are on the same page about the hotter/cooler foul issue though.
ive seen the same neg timing youve seen, so its not you sg2. Ive found 93oct gas vs 87 made a diffrence to the wide swing (recovers much faster to pos/higher timing).
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