You know an important fact to keep in mind, are the minimum thicknesses of the harmful space inside the combustion chamber, below 4 / 4.5mm the mixture does not burn! if you do not have a good turbulence it is useless space that serves to generate with counter flame that induces detonation, it is very useful to have set the whole mixture on fire with a microsecond timing (very difficult for ordinary mortals)
However, taking this into account if you play with the advance ramps you can do it with a lot of effort, but it's worth it in terms of power and reliability.
In the past, playing with a 50cc brand, Garelli, ex Angel Nieto big world champion of small displacements, I discovered fantastic phenomena related to turbulence related to the ignition advance. this record engine, methyl alcohol fuel, with NOS injection and extra alcohol, delivered 27 HP to the wheel! 16000 rpm, the interesting part and this, up to 12000prm, advance ignition 35 degrees in ramp, from 12000 to 16000/17000 rpm retarded in ramp up to 23 degrees of advance and at maximum power we had to delay further 10 / 12 degrees
!! penalty, violent seizure and / or big hole in piston. compression ratio 16 to 1, considered by the PMI.
This was a billet engine with malhe nikasil cylinder,
winner of two world championships.
max admissible water temperature 48/50 degrees centigrade.
The cdi was built by a German genius! krober brand! it did miracles, even they were 600 hp liter, no turbo or volumetric compressor, in the 2 troke it serves no purpose.
We had to study the shape of the head and squish very well!
this happened 45 years ago. We weren't stupid ...
Now I try to have fun with these big indecent pumps, jejejeje