I can engage vtec as low as 1500rpms with my VAFC, and setting it at 2400 seemed to net me the best highway mpg (cruise between 26-2900rpm) during the summer, but due to this colder bout of weather it's been kicking my ecu into open loop any time I'm at low load longer then a min or two, so im thinking that possibly with the colder charge air (70-80f IAT, 25-35F ambient) that running vtec engagement at 2900 will help keep the ecu from running open loop. I'll post preliminary results aft my return trip home, and do some aba testing over the rest of the week!
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'97 Acura CL 2.2L 5spd
'03 Honda CR-V 2.4L EX 4wd Auto
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