Cx P05 ecu fed vs california

[theholycow]

I would also disagree with the tuner thing. I've never heard of a tuner who knows how to tune for a hypermiler; they get practice tuning for a few racers and many wannabe-racers. The OEM tune is most likely better for a hypermiler.

[evans performance]

i have done plenty of MPG tunes. i like to throw a few cheap bolt-ons at the car, then some cbr injectors and tune for lean cruise. cbr injectors atomize fuel like you wouldnt believe. you can cruise at 17-18:1 afr with no problems. of course thats not the best for emissions and thats why the stock tune isnt best for MPG. they compromise emissions and MPG.

i have no clue why hondata doesnt list the po5 ecu, i have one in my racecar right now running neptune and i have probably sold at least 50 of them chipped.

also on your warm air intake. i know of the benefits of warming intake air and fuel, but i am a big fan of making horsepower and being efficient. have your cake and eat it too if you will. i have no problems getting single cam civics without opening the engine making 140whp and getting 40+mpg. thats the beauty of fuel injection. you can tune the cruise area of the map completely different than the high load acceleration area of the map.

[theholycow]

An MPG tune for an average driver or racer/wannabe is not the same as an MPG tune for a hypermiler.

Bolt-ons rarely pay for themselves in MPG improvement, when measured accurately. If your goal is saving money then bolt-ons are usually counterproductive.

CAI vs. WAI: It really depends on the car. Some cars get better FE with a WAI (and worse with a CAI), some are completely unaffacted by IAT. The commonly cited issue of freeing up flow is a non-issue for an economy-minded driver, who uses a fraction of the available free flow in a stock system. A CAI will simply not improve FE for an economy-minded driver.

Certainly there are some things that can sacrifice emissions for FE. There's also things that might sacrifice some driveability, like more aggressive DFCO. The improved injectors allowing a leaner AFR sounds possible. How much does a tune + CBR injectors generally cost, and how much improvement do you think someone already getting 140%+ of EPA estimates will see?

Edit: And anyway, most fuel-injected cars come from the factory with a CAI.