Normal
one school of thought says that the multiple electrode part of the sparkies will 'disrupt' the flame kernel expansion, hence why some people actually bother to index their single-electrode sparkies so the open gap will face the center of the cylinder, supposedly better for combustiondenso iridiums didnt work for me :P didnt last long enough, the other time the insulator broke...which could be due to other things also lah hehehei say stick to fresh new shiny cheap @$$ coppers :P
one school of thought says that the multiple electrode part of the sparkies will 'disrupt' the flame kernel expansion, hence why some people actually bother to index their single-electrode sparkies so the open gap will face the center of the cylinder, supposedly better for combustion
denso iridiums didnt work for me :P didnt last long enough, the other time the insulator broke...which could be due to other things also lah hehehe
i say stick to fresh new shiny cheap @$$ coppers :P