Is there any benifit to modifying the spark plug hole? When I look into the trailing spark plug hole especially, there is a hole only a few mm in diameter. This is not the best for flame propagation. I don't see it working that well at all.



I have heard of people drilling this hole out so that the spark would be more exposed to the combustion chamber, but there was a loss of power due to the loss of compression when the apex seal passes over it.



My idea was to make a slot, width wise, making the slot as thick as the holes diameter. Maybe 10mm wide x 2mm thick?? This will make the flame from the spark plug much more exposed to the combustion while still being able to keep compression when the apex seal passes over it. Good idea or not?



Could probably do the same with the leading hole as well. I dunno. what do you guys think?

 

sounds good in theory.... i wonder if anyone has done the same or something similar