Target AFR at Idle/Cruise with carbs |
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Target AFR at Idle/Cruise with carbs |
yeahmag |
Jun 23 2011, 09:21 PM
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#1
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Advanced Member Group: Members Posts: 2,422 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
I was reading a thread on carb tuning that John Connolly of aircooled.net was on and he suggests a much leaner idle/cruise AFR than what I've been running. I've set a target of 12.5-13.5 in that range, but he suggests you can go much leaner than that.
This may also explain why Jake thought I was nuts when I went from a 60, to a 62, and then finally a 65 idle jet on my 40 Dellorto's. Does anyone have any real world insight on this? I've loaded in my 60's for a ride tomorrow... -Aaron |
Mike Bellis |
Jun 23 2011, 09:37 PM
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#2
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
That target AFR is good. You need a head temp gauge to prevent melt down. Most water cooled engines can run leaner, down onto the 16's but they are not at risk of melting a head. A lean condition will make the engine run hotter. If you do not have a way to monitor head temps, do not go leaner.
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