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Funny you should bring this up. I checked my 1999 ZR 440 Sno-Pro and found it was set to +2 ! Yikes!
Spoke to the owner of the dyno shop where this sled was tuned, and he indicated it should be set to 0 during cold weather (20 and lower) and -1 for warmer weather (20+). Not sure how it got to +2, but I will dial it back when I get back north next week. Dyno guy also stated; never run anything but 93 octane fuel in this engine - never. The engine was tuned with 93 Ammoco fuel.
Bottom line; the engine pulled like crazy at this setting. No problems whatsoever. Plugs looked perfect at the end of the day.
Member C-note is expert on these sleds, may want to PM to him.
Spoke to the owner of the dyno shop where this sled was tuned, and he indicated it should be set to 0 during cold weather (20 and lower) and -1 for warmer weather (20+). Not sure how it got to +2, but I will dial it back when I get back north next week. Dyno guy also stated; never run anything but 93 octane fuel in this engine - never. The engine was tuned with 93 Ammoco fuel.
Bottom line; the engine pulled like crazy at this setting. No problems whatsoever. Plugs looked perfect at the end of the day.
Member C-note is expert on these sleds, may want to PM to him.