What is the advantage of using the TDC Checking Bridge?
Without bridge, you must tell program where #1 Intake Lobe is timed (like 108 centerline, .045″ lift at TDC, etc). Then the rotary encoder is timed from this for all other lobes on the cam. With the TDC checking bridge, you find dowel pin or keyway location. Then with info Performance Trends has on where these are suppose to be located (timed) for about 100 common engines, we can say how the cam was designed to be timed in the engine. This assumes you will use standard timing gears, timing marks, etc. However, if Performance Trends does NOT have information on your particular engine, and you can not obtain it, you will have to measure a few cams to obtain your own number.
