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I have the same problem with my 850cfm Demon. I have a 460ci with 10:1 c/r. Cast iron ported heads. And a Cam Research 291 duration cam. Timing is set at 10 init and 36 total. Plugs run tan not black. I asked Barry Grant tech line why the "Idle-Eze" circuit wasn't doing much to change the idle speed and allow me to close the primary throttle plates and maintain a decent idle without run-on after shutting off. After two e-mail attempts I still have not received a response. I will try again today.
Rick.
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FFR#3169 BBF460ci, Carb, Tremec TKO, Titanium
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