Quote:
Originally Posted by Jyden
Warmer air fools the computer to open throttle valve more, cause less Oxygen in warm air.
Throttle valve is biggest restriction on a normal gas engine. Less restriction => less loss => better FE
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This car has a throttle cable, so the computer reduces the amount of fuel to keep the fuel air ratio correct, other than that you are right.
There is also the perk that the engine warms up easier with WAI.
Quote:
Originally Posted by BlueCruxHF
Im still a bit confused on how the warm air benefits the mpg....shouldnt it hurt overall? Cold air is more dense, of course and produces more hp, seems like you would gear down less with more hp...
Seems like my 88' HF has the worlds easiest wai to assemble...just metal flex pipe it to the exaust shield and your done, but how does it work for mpg?
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As for lack of power, downshifting is good in the sense that it means that the engine isn't too powerful, a big engine will use more fuel for a low power output compared to a weaker engine. My car's gearing is so low that I can take a 7% grade in 5th gear, as such more power would just make my FE worse. Your 1st gear is about as tall as my third gear is, your third is as tall as my top gear.
You have a civic that would be ripe for this mod:
http://www.aerocivic.com/