Quote: I can't imagine ever going back to tuning without one...... The "look" of the plugs only tells you so much.......just like that number the O2 spits out only tells you so much....It shows lean and rich stumbles and you INSTANTLY know it's a lean OR rich stumble, instead of guessing and spending DAYS trying to dial it in....I just thought I had some of my cars dialed in, until I hooked my LM1 up!! lol
You can turn just ONE of the six idle mixuture screws on a Six Pack and SEE it on the O2 that's in just one pipe.........There's NO WAY reading plugs will tell you that.....
You can also see when you're PV opens up........you can watch the motor get leaner as you tip in, then watch it get instantly rich......Plugs won't tell you that and the ass-dyno isn't that accurate........
If it's a race only car that has to only idle and go WOT, you don't really need it (but it can help)........but for anything street driven, IMHO, it's a must-have......
how have you applied this to bracket racing? I guess I am one of those guys that don't give a flip whats going on as long as the car repeats lap after lap. that's what wins races/money not having a perfect tune. I could care less about being politically correct. I give mine what it wants to make it run the number. but I would like to know what the LM1 says just from curiosity. bring your dang gizmo down and spend a day at the track
The "look" of the plugs only tells you so much.......just like that number the O2 spits out only tells you so much....It shows lean and rich stumbles and you INSTANTLY know it's a lean OR rich stumble, instead of guessing and spending DAYS trying to dial it in....I just thought I had some of my cars dialed in, until I hooked my LM1 up!! lol 
