Quote Originally Posted by steveo View Post

also about the effect of timing on fueling, yeah it'll do a bit. especially in cruising range it's a big..big deal.

they're kind of in a symbiosis

but if you do your fueling while your timing is 'imperfect' you'll find the tweaks necessary to get your fueling back in like is minimal.

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I'm thinking that's what Dave has in mind - to get the fueling closer to "right" before fiddling with the timing.