After some reading (surf ) i know tha by pluging into the original o2 sensor bung we can have accurate A/F reading, this is a compulsery reading if you are going for a good engine optimization.
And with corect data cable we could plug in to the car's ECU managment console with a laptop. But provided we have the right softwear in it. For Honda "Hondata" provides this.
Question is, has anyone dared to try this? If yes, any experience and thoughts on DIY tuning?