15.0 mpg to 21.6 mpg!
Its a reasonably metric for comparison. Far better than what most people do.
As far as this goes
The attached is from "Walter B. Larew, “Carburetors and Carburetion” At the time he wrote his book on carburetors he was a retired Brigadier General who taught Military Science at Cornell, among his other accomplishments. He published this carb book in 1967." (This was originally posted on the racingfuelsystems forum but that's undergoing some changes so isnt visible there at the moment.) Desired Carburetor AFR Characteristics At Different % Load - racingfuelsystems.myfunforum.org
The mixture ratio "F" is shown in terms of Fuel to Air.
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0.0833:1 Fuel to Air = 12:1 AFR
0.077:1 Fuel to air = 13:1 AFR
0.0714:1 Fuel to air = 14:1 AFR
Its a reasonably metric for comparison. Far better than what most people do.
Yup. What your engine wants is basically what should be expected. The only part of Edelbrock's diagram that appears to be a simplification is using rpm instead of load. Its actually easier for most of us when given in rpm although there are some high load, mid and low rpm situations; mre so with trucks than hot rods.
As far as this goes
it is based on an incorrect assumption. Running over 14:1 AFR at idle is a relatively recent phenomenon and is not naturally what most engines like best. It works with higher idle speed, timing to match, and in concert with the catalytic converter to reduce emmissions in several areas at once. Some observations on this here Heat riser affect wideband? - Page 2 - racingfuelsystems.myfunforum.org
The attached is from "Walter B. Larew, “Carburetors and Carburetion” At the time he wrote his book on carburetors he was a retired Brigadier General who taught Military Science at Cornell, among his other accomplishments. He published this carb book in 1967." (This was originally posted on the racingfuelsystems forum but that's undergoing some changes so isnt visible there at the moment.) Desired Carburetor AFR Characteristics At Different % Load - racingfuelsystems.myfunforum.org
The mixture ratio "F" is shown in terms of Fuel to Air.
----
0.0833:1 Fuel to Air = 12:1 AFR
0.077:1 Fuel to air = 13:1 AFR
0.0714:1 Fuel to air = 14:1 AFR
