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I don't know how the HX engines operate, but for the VX getting back into leanburn after heavy load is a matter of letting off the throttle and getting back on it. I don't know what the shift light is indicating other than optimal shift points.
TPS bypass is for leanburn in idle.
Headers may help to some marginal degree for more efficient power production, probably not worth the cost unless your'e going all out.
EGT's are no concern with what were doing, I only mentioned it because its a direct indication of why leanburn is more efficient than shoichiometric burn.
Mileage on the first controlled tank was 58.3 on my WNC mountain route. This is up about 1.8 mpg from previous weeks, but it was also cooler tonight which must be taken into consideration. I believe the current mods yielded a solid 2mpg gain, but will have a more solid number in a few days. I'm still working on the final mod. 60mpg+ on the mountain run will be easy to hit once the fuel sucking tires are replaced.
...And for what it's worth, I'll probably be selling the fuel controller and using a $2 variable resistor to accomplish the same thing.
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