Michael wrote:

[...] The time the flame front will take to travel through the
combustible gas is primarily a function of two things that are
somewhat under your control - charge density (meaning basically how
much air is there) and mixture. [...]

It may be interesting that the vulnerable time between the spark and
TDC is also to some extent under one's control, with the blue knob.
Thus here's another reason for using maximum RPM for takeoff.

- FChE