Fuel Consumption Advice
#21
04-10-2011, 11:17 AM
The same, and be aware that the PCV has a 15% column that the PCIII doesn't have. The 7% reduction works for Fuel Moto maps, but might not be appropriate with others like those from the PC site. OTOH the maps from there tend to be even richer than Fuel Moto maps, so I think you'd be safe with the 7% rule. Some have mentioned "economy" maps from the PC site, so I don't know about those.
If you get any hesitation or detonation you'll need to adjust the map in the other direction, but low-speed, low-load cruising may reveal some gurgling, for lack of a better word, but that won't hurt anything as long as there's no hesitation. That is normally around the 5-10% area so if it bothers you adding some fuel to that area in small increments won't hurt mileage much. Normally you'll be at 10-15% TP at moderate highway speeds. Watch oil temperatures, as leaning the AFR's will cause head temps to increase--but these changes won't be as lean as stock, and if you have an oil cooler you should be in good shape.
FWIW I'm running 14.6:1 in the cruise range and have no issues. Mileage is good as long as I stay at modest highway speeds (~55mph), usually in the upper-40's.
If you get any hesitation or detonation you'll need to adjust the map in the other direction, but low-speed, low-load cruising may reveal some gurgling, for lack of a better word, but that won't hurt anything as long as there's no hesitation. That is normally around the 5-10% area so if it bothers you adding some fuel to that area in small increments won't hurt mileage much. Normally you'll be at 10-15% TP at moderate highway speeds. Watch oil temperatures, as leaning the AFR's will cause head temps to increase--but these changes won't be as lean as stock, and if you have an oil cooler you should be in good shape.
FWIW I'm running 14.6:1 in the cruise range and have no issues. Mileage is good as long as I stay at modest highway speeds (~55mph), usually in the upper-40's.
#22
04-10-2011, 11:19 AM
The same, and be aware that the PCV has a 15% column that the PCIII doesn't have. The 7% reduction works for Fuel Moto maps, but might not be appropriate with others like those from the PC site. OTOH the maps from there tend to be even richer than Fuel Moto maps, so I think you'd be safe with the 7% rule. Some have mentioned "economy" maps from the PC site, so I don't know about those.
If you get any hesitation or detonation you'll need to adjust the map in the other direction, but low-speed, low-load cruising may reveal some gurgling, for lack of a better word, but that won't hurt anything as long as there's no hesitation. That is normally around the 5-10% area so if it bothers you adding some fuel to that area in small increments won't hurt mileage much. Normally you'll be at 10-15% TP at moderate highway speeds. Watch oil temperatures, as leaning the AFR's will cause head temps to increase--but these changes won't be as lean as stock, and if you have an oil cooler you should be in good shape.
FWIW I'm running 14.6:1 (stock) in the cruise range and have no issues. Mileage is good as long as I stay at modest highway speeds (~55mph), usually in the upper-40's.
If you get any hesitation or detonation you'll need to adjust the map in the other direction, but low-speed, low-load cruising may reveal some gurgling, for lack of a better word, but that won't hurt anything as long as there's no hesitation. That is normally around the 5-10% area so if it bothers you adding some fuel to that area in small increments won't hurt mileage much. Normally you'll be at 10-15% TP at moderate highway speeds. Watch oil temperatures, as leaning the AFR's will cause head temps to increase--but these changes won't be as lean as stock, and if you have an oil cooler you should be in good shape.
FWIW I'm running 14.6:1 (stock) in the cruise range and have no issues. Mileage is good as long as I stay at modest highway speeds (~55mph), usually in the upper-40's.
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