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Originally Posted by California98Civic
Nice deal and set up. I almost want to experiment with this, but I don't want to lose my OBD2 port's functionality. I have looked at SAFC2 units
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I would be careful with this. the OEM D16Y7 was not designed to run very lean. The HX engine (D16Y5) was designed to run lean without any problems. I am only running 17.5 air fuel ratio, so nothing too crazy. The timing was also set to be on the safe side of lean as well.
Oh, I also kept all my OEM hardware so I could revert to stock if needed for inspections or anything else.
Quote:
Originally Posted by MakitaDiesel
new to tuned ECUs & am curious how one can delete these 2 important sensors & return better driving & mileage, my guess is at the expense of emissions.
Do you leave the 5-wire O2 in the bung or swap it for a simpler 1-4 wire?
Did the power/response increase as well?
I'm also curious if running a tuned ECU for a long period of time would affect engine longevity otherwise everyone looking for mpg gains would be after it...
Thanks for the info
Mak
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I was told by the tuner that honda cars read better off the MAP sensor than they do the O2. He can run the car with or without an O2 sensor. If you choose the O2 sensor route, he uses a 5 wire wideband for better monitoring. I think he said the sensor was $50 or less and recomended a good brand to go with.
Emmissions are sacrificed any time you are in lean burn. That is eccentially why these cars are no longer made. I still dont get why a Hummer is street legal in California while these lean burn civics were not allowed. It just shows where their priorities are... Helping the oil companies!
Power is noticably better over 3k if you choose to use it. The shops original goal was to sell 300+ HP turbo cars that were fun to drive, but still got 60-70 mpg on the highway when you were just cruising.
I have not noticed any side effects for the long term use. I believe the state of lean burn it is in is not as agressive as the one from the factory. I head insights getting into 24-25 ratios, where this one is only at 17.5. The tuner even said there was alot more room to gain, but if I choose to go more lean he would want EGT gauge to monitor cylinder #3 (I guess it is the one that gets the hottest). I might go this route down the road as I have a couple extra EGT gauges laying around, but for now I am just enjoying the lassle free lean burn.