yes it has..i can tell you some have even ate shit up seeing the drove the car all the way back to the pits before checking the plugs which will lead you to thinking your rich and then you will eat shit up.

make a pass and kill the motor right after you go threw the traps if you using a good amount of juice and really want to get a good reading..park car at the end of the track an then see what they look like..tow back to pits or drive and adjust.