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Old 04-18-2021, 07:28 PM   #24 (permalink)
Ecky
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ND Miata - '15 Mazda MX-5 Special Package
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I imagine you could get a fair bit of mileage with running as little lean as 1.04-1.07 lambda, even without adjustments to ignition timing.

Heat isn't an issue at low load (which it would be during cruise), and temperature actually starts to drop off past ~1.04-1.05.
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