Jayhawk500 posted:I saw in a theard here a few years ago about enlarging the air intake hole to 3/16". I've done this on both of my engines that I modified with GRJ's Chuff Generator and Super-Chuffer. They really put out the smoke volume.
Opening that hole to the largest possible without touching the electronics is very beneficial. Sort of an old hot rodders trick, more air in, more air out!!