Quote:
Originally Posted by xntrx
I did some deeper analysis of the build, mainly the tuning of their project. the results are they killed 5-10 mpg by switching to a programmable ECU.
The hondata system used cannot read the NGK O2 sensor, and instead uses a bosch style O2. This lowers the readable AFR range from 27.56 to 19.5, effectively killing the lean burn capability.
This system cannot control the EGR system either, increasing pumping losses.
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That's good sleuthing. Thanks.