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Originally Posted by t vago
Still, the basic idea behind the chart supports HAI theory in regard to reducing pumping losses.
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Yeah, that's what I meant when I mentioned load. Like, if you are steady at 40 mph at 20% load at 70F IAT, I wonder if the larger throttle opening required with 160F IAT would equate to 20 + 15% = 23% load in the exact same situation. It [mostly] boils down to pumping losses. There will obviously be more of a difference at higher loads where the air density difference (ADD - how about coining a new acronym here!) will put a bigger dent in the engine load difference, thus affecting pumping losses.
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Heh... I'd love to get a cheapie datalogger...
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8226 - CarChip Pro Automotive Logger
Sort of like this. But I have seen even smaller dataloggers for sale in the MAC Tools fliers for around $50. They are tiny and just plug into the OBD port where you leave them. The MAC one (which I cannot for the life of me find online, so it probably does not exist anymore) records the last 24 hours of vehicle data. All you do is hook up to the mini-USB port and download the data onto your computer with the included software. It works pretty slick.