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You should try a vacuum gauge or another means of precisely measuring load. It's not full throttle if you are in higher gears. You can drop manifold vacuum to 0 even at 25% throttle if you are in high gear at low enough speeds, and that seems to be your average in the competition.
Like most things it can be too little and too much. I would make sure you did not get into any full throttle-full load enrichment, but it's been my experience over many types of vehicles that you can go too much and too little with load and gearing. Find the sweet spot and stick to it like glue. The longer you can glide on a bike the better, which is a reason for ballast, but it may also mean you need to accelerate in a lower gear to prevent excess load from prolonging your pulse phase.
If you can get your pulse to glide ratio up to 1 to 3 you should be doing fine, but on a bike the aero will slow you down much faster, which can be mitigated by your tuck, other aero, and higher sectional density (added weight).
Get that all coordinated and it will be hard for any other vehicle to beat you unless it's something real unusual.
regards
Mech
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