I'm thinking about chipping my prelude 96 si's p14 ecu, but not so much as to gain more performance, but to gain more mpg. I don't intend to drive hard at all as this is just my point a to point b. I would assume that a modified chip has a lot to do with leaning out the fuel curve throughout the rpm band, right? Therefore, if driven normally, I should see better mpg. Any input on this?

 

Correct. Elementary school... or common sense gained in Elementary school taught me if you used less of something, you will use less.

You would want a wideband to monitor a/f's so you don't go too lean. Not worth the cost of a tuner, wideband, etc etc etc IMO

 

More like middle school, Lol. I didn't learn anything in elementary but I hear you though. Thanks.

 

A light foot will see better mpg gain then anything else. Google how to hyper mileage cars lol. Some yuppies take it to a whole another level. But you can gain another 10mpg if your dedicated. But its things like never use your brakes while turning and turn off your car at every red light lol...

 

A completely stock honda is already pretty efficient. You cant lean it out much more than its set to run at cruising loads. The best way to get top mpg is to maintain the car (plugs, o2 sensor, oil, cap/rotor, tires, etc) and use a light foot.

Using an aftermarket ecu is for tuning an engine configuration that the car didnt originally come with. In this case you would tune cruising speeds to around 14ish to one air fuel ratio, using a wideband o2 sensor. "Chipped" ecus are old school, and regarded as not useful because you cannot guess how a modified car will run. It must be custom tuned using the tools mentioned.

 

suprisingly simple aftermarket upgrades will raise mpg like headers

 

chipping and running around on basemaps is unreliable. TUNING on the other hand is where gains and efficiency increase.

 

Headers? Interesting as I thought this would be completely opposite.

And as for tuning, from what I've researched I don't believe you can tune a p14 ecu, no?

 

you would have to convert to obd1 and use a socketed obd1 ecu

 

why less restrictions and more efficent but can throw a o2 code, the cat system is to keep the earth green lol.