S&S Carb issue

[BuxBitza]

Too little of timing ... needs more...

What does this mean?

[Dragstews]

Looking at the ground strap ....

Too much timing and the color change will be very close to the threaded body of the plug, too little and it'll be closer to the tip. Ideally you would want it right in the apex or center of the 90 bend on the ground strap.



Another indicator of timing.
You'll usually see a brown ring right at the tip of the porcelain area it should be a sharp and defined ring about .020 wide. Wider indicates not enough timing and any smaller , or only 1/2 way around or nonexistent is the second indication of too much timing in the motor.