"Lean Cruise" ECU Modification Thoughts

[GasSavers_scostanz]

First, let me say that I can't be the first to think about this but I wanted to run it by the group for comments. I've already got a chip burner for another project I'm currently working on and I've been reading as much as I have time for on the pgmfi site about modifying the stock Honda ECU....it looks very straight forward. Here's what I'm thinking. Setting the ECU up for data logging and gathering some logs for a typical day's drive for me to determine where the engine spends most of it's time rpm and load wise during the drive. Once I have that information, modifying the fuel table(s) to run leaner in that range. I'm betting you could go at least to a 16:1 AFR if not better with no damage. The GM ODB1 ECU I'm currently playing with has a lean cruise option that is configured from the factory to run at 15.4:1. I will need to get a WB O2 sensor and get my other project a little farther along before attempting this.

Any comments/criticism to this idea. Has anyone tried this? If so, what kind of FE results did you experience?

Thanks in advance for your input.

Oh, I have a 94 Civic DX coupe with the D15B7 and manual tranny.

-- Scott