Join Date: Feb 2000
Location: St. Charles, IL
Although I don't own one and have never used one, these devices are very useful for discovering the amount of timing your engine has at any given rpm. They way I understand it, you can set your rpm anywhere you wish and "dial back" the timing mark to zero using the knob on the timing light (by "dial back", I mean watching the timing mark on balancer while your engine is running and adjusting the knob to bring back the timing mark to zero degrees). You would then read the amount of timing marked off in degrees around the outside of the knob and that is your total timing at this rpm. The only thing I am not sure of is if you need to add your initial timing to the timing found as explained earlier. Maybe someone else can clear this up for both of us. I am no help as far as what brand to buy, but I will watch other replies to your post and see what suggestions other guys may make.... as I would like to own one of these useful tools myself!
Hope all this was of some use to you.... If I got this all wrong I appologize in "advance" !!!! HA! HA!