Quote:
Originally Posted by tlillard23
5 seconds of 70% throttle PE is equal to XX seconds 70% throttle position at 14.6 afr? or where the math work out for equal MPG.
I like the option of PE at 70%, normal driving I am not above 70%. if you are above 70% throttle, aren't you "wanting" to use fuel, make power? And yes, the delay resets when you let off, main reason I deleted it.
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While it makes sense that shorter time at richer mixture compared to longer time leaner would use very close to the same amount of energy to do the required work, I think in most cases you do use more fuel in the richer/shorter version because the combustion efficiency drops and that means more unburned fuel out the tailpipe. We hear all the time about avoiding jackrabbit starts to get better economy and I certainly see that in the Buick which I have set to go into PE pretty easily. If driven carefully it will get about 15% better mileage compared to driving in a "spirited" but more fun way. With the van that does not go into PE very often, the best way I have found to improve mileage is to prevent as many downshifts as possible, especially on rolling hills.
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