Quote:
Originally Posted by jimepting
Darin,
I have attempted to duplicate your results with my own 2006 Insight. I don’t come anywhere close to the 14% that you measured. The list of modifications that you made do not seem to support a 14% improvement in fuel economy. I think that you must have unintentionally tripped over some sort of measurement bias, or error.
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I think I figured out one of the things that may help account for some of the added efficiency. If you look at InsightCentral, there's a radiator block modification that people have used to deliberately raise the operating temperature up to the 200-203F range. If memory serves, lean burn is reluctant to kick in at temps below 197 but entirely willing over 200. Memory serving is a big if though- it's been a while. But the grill block may give more than just an aerodynamic advantage in the case of the Insight. I have a very fuzzy memory of reading somewhere that the later Insights may have been programmed to be even more cautious with lean burn for some reason, so the 06 may be tough to push into the lean burn zone. Definitely check InsightCentral for the details though.