Stock Air-Fuel Ratio?
#1
Stock Air-Fuel Ratio?
With the 2007 touring bikes, does anyone have info on the stock Air-Fuel Ratio's and stock VE, and Spark Advance Tables, etc.
I would like to compare them with the #78 SERT map. I guess, what I'm looking for, are the differencesbetween the stock numbersand the #78 map, how much does it richen up? How much of the stock mapis in closed loop? etc.
I would like to compare them with the #78 SERT map. I guess, what I'm looking for, are the differencesbetween the stock numbersand the #78 map, how much does it richen up? How much of the stock mapis in closed loop? etc.
#2
#3
RE: Stock Air-Fuel Ratio?
Sorry I don't have an exact answer but I have ran the Twinscan II with sniffers on a Stock 07 Ultra, it ran right in the 14.7 to 14.9 range at idle and cruise speed and never got richer than 13.5 to 1 but I really did not spend a whole lot of time on it either, I did notice that the stock timing was very conservative and ran only 12 degrees at idle, I also noticed that the headpipes glowed orange in less than two minutes when ran on the lift. As far as getting a stock map, you would need the HD digital technition, Maybe Shovelhead Bob has a copy?
#4
RE: Stock Air-Fuel Ratio?
It's too bad we can't see the stock numbers. What you are saying about sniffing no lower than 13.5:1 makes sense to me.
and of course running leaner the spark advance would need to be lower.
When I look at the #78 map, it has a strange Air-Fuel Map and Spark Advance in the 750 to 1250 rpmwhen theMAP is in the 80 to 100 range, 14:6:1 fuel ratio and -4 to 0 spark advance. At 1500 rpm the fuel ratio is 13:1 and the spark is just starting to go positive. The rest of the spark advance map areas arearound 18and above. What would the reasoning for doing this? I would think this is the start of rolling on the throttle from idling at a stop.
and of course running leaner the spark advance would need to be lower.
When I look at the #78 map, it has a strange Air-Fuel Map and Spark Advance in the 750 to 1250 rpmwhen theMAP is in the 80 to 100 range, 14:6:1 fuel ratio and -4 to 0 spark advance. At 1500 rpm the fuel ratio is 13:1 and the spark is just starting to go positive. The rest of the spark advance map areas arearound 18and above. What would the reasoning for doing this? I would think this is the start of rolling on the throttle from idling at a stop.
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