M20 with 284/272 idle afr

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  • zaq123
    E30 Mastermind
    • Jul 2016
    • 1554

    #1

    M20 with 284/272 idle afr

    Do you guys think that cam has big enough overlap where idle will improve with 13.8 base afr at idle? My idle isn't super bad but I want steadier considering its at 900 rpm already. Would it makes sense to lower AFR to 13.8 in case the cam lets some fresh air into the exhaust?
  • 88Sedan
    Wrencher
    • Apr 2023
    • 263

    #2
    Not an expert on m20s but 13.8 sounds pretty rich to me. What engine management?

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