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05-31-2019, 07:01 AM | #21 | |
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Join Date: Jan 2012
Location: Lyman,ME.
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Re: Air/Fuel Meter/gauge
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05-31-2019, 01:27 PM | #22 | |
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Location: NM
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Re: Air/Fuel Meter/gauge
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My engine runs like crap if I try to get above 13:1 at or just above idle. I've read where some get their engines to show 14's at idle, just not in the cards for mine. The difference in gas consumption just can't be significant, the difference in driveability is huge.
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'52 F-1, EAB flathead |
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05-31-2019, 01:55 PM | #23 |
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Location: East Hartford, Ct
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Re: Air/Fuel Meter/gauge
Trying to achieve those readings at idle seems like too lean to me.
What are your cruise speed readings?
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05-31-2019, 02:42 PM | #24 |
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Re: Air/Fuel Meter/gauge
At a steady cruise, 45+, mid-to-high 14's. I could do better but I live at 5300' altitude, but have jets that allow me to get down to the lowlands without hitting 17's. Also, pushing a truck thru the air takes a lot more HP at cruise than a smoother car. The drag coefficient for a '52 is about the same as a barn door.
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'52 F-1, EAB flathead |
05-31-2019, 03:14 PM | #25 | |
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Re: Air/Fuel Meter/gauge
Quote:
Would be nice to adapt an aircraft carb. with variable mixture control on the dash but those are for the most part, up draft carbs.
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DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES |
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05-31-2019, 03:22 PM | #26 |
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Re: Air/Fuel Meter/gauge
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05-31-2019, 03:32 PM | #27 |
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Join Date: May 2010
Location: East Hartford, Ct
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Re: Air/Fuel Meter/gauge
Not on the ones I had, just a mixture control on the instrument panel to adjust for altitude.
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DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES |
05-31-2019, 03:38 PM | #28 |
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Re: Air/Fuel Meter/gauge
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05-31-2019, 06:36 PM | #29 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: Air/Fuel Meter/gauge
I am in mid-central Minnesota at a bit above 1000' elevation. I have an AEM gauge on my test stand. From experience, while a flathead will run at the desired 14-15:1 at speed, they tend to idle best at about 10:1. I consider it to be normal, and have convinced myself to live with it.
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05-31-2019, 10:15 PM | #30 |
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Location: Chester Vt
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Re: Air/Fuel Meter/gauge
A lean mixture needs more advance in cruise, and there only distributor that can providing that is the SBC along with the right advance under pow.. It get kinda tricky balancing this timing with the AF/ I start with 16 mechanical all in by 2k and 8 degs Vac I use the initial , just to get it started. This way you have aprox 26/28 degs in cruise, and 18/20 at WOT. Which will prevent detination on tje crapy gas we have. Haveing an adjustable Mach advance also helps. This might sound like allot of work, but the 5 plusK invested in the engine is worth it.
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