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 |
brant |
Jun 24 2011, 11:52 AM
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#2
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
if you lean out the idle a bit and don't get hot you should pick up that fuel economy
(I know that sentence is only restating the obvious) but I think there is a larger thermal safety margin at 2500rpm than there is at 5700rpm so you should be very safe in giving it a try. I only use an innovate myself, but I think an EGR would be the real way to evaluate what your looking for. Still just keep trying... tinker away |
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