cam / crank phase tester

tcmtech said:

So if piston face position and timing in relation to valve actuation is not key what exactly are you comparing in the timing alignments between crankshaft and camshafts to and for?

I'm curious to know if there is more to an engine's performance than just how the pistons and valves work together in an IC engine being that as I have ever understood it the goal to make them work together the most effectively as possible to achieve the desired end results?

I'm pretty sure I can't just toss a cam or cams in an engine at various random settings with no accurate alignments to the crankshaft and other key rotating parts and make an engine work.

Or can I and I and millions of other engine builders have been doing a lot of precision measuring fussing over nothing all these years?

Click to expand...

the circuit maps the cam(s) position vs the crank reluctor position. the missing pulse (or pulses) on the reluctor are the count recycle, which doesnt seem to coincide with piston TDC

Those reluctor wheels have to be accurately phased and referenced with one master piston at a specific predetermined index point and one valve set on a cam to have any meaning for the software to work with.

Back in the old days that was typically with a specific piston at TDC and a specific intake or exhaust valve at .050" lift or as such a number determined by the engineers who designed the engine.

Regardless of how the software handles things it still requires a master index point on every reluctor wheel to represent a very specific mechanical point in the cycle of the crank or cam shaft otherwise there is no way for the software to be able to time the needed actions to the movement of the physical components.

Simply put you can't take a reluctor wheel off a shaft and cut a new index pin or keyway in it at some odd Degree off from where it's supposed to be and have the fuel injector and ignition timing makes any sense in relation to when intake valves are open or when the spark plugs fire in relation to where the piston is at and that's a rather significant timing event in the function of an internal combustion engines operation.