It seems like it's smacking the plug, even when I have my fat azz in it.
So i put the washer back on spark plug, with the heat sensor. I gave it a good pre-run on jack stands. top 47 mph, @ 11,900 Rpms. And it didn't smack the plug. So looks like i'm getting full performance with the washer. But still will half to see what it does when there is a load on it. interesting note: same time I did the pre-run on the stands, put in a new Iridium spark plug I got that day. max mph went up 1.1 mph and rpms went up around 200. (over stock spark plug)