[nbleak21]

I never ended up reporting back after doing my testing... it appeared that disabling Vtech improved cruising MPG in the higher rpm range 2500-3k rpms when in gears 1-4 (up to 60mph), but when cruising at highway speeds (65-75mph) the engine was very much lacking in power, and required extra fuel dumping to maintain speed.

On a side note; In the past couple weeks I've opened up the exhaust system (full 4-2-1 header, high flow cat, flow through exhaust) and have noted a larger improvement in FE when vtec engages, but I've also lost some low end power, so I will be installing a flowmaster 60 series muffler to hopefully alleviate that and the sound a little bit, while still improving flow.