Boost refers to ESCs that adds timing advance, boosting the speed and performance. Also known as dynamic timing or ramping. But stock got out of hand and was nearly as fast in some ways as modified.

So no timing rules were developed, which typically requires a blinking light on the ESC to confirm it is in no timing mode, thus ‘blinky’.

Important to know which rules the class is.

Gearing, if blinky try gearing up, bigger pinion / small spur. Watch motor temp, it can get too hot if overgeared, and go by track performance and lap times.