Dynamic compression Test/Power test

[Trump]

I posted this in the incorrect section (MS3) Just worked out how to move it here.

Dynamic compression test.
Is it possible to get a good sized graph of Voltage V Time or RPM V Crank angle while the engine is cranking over for at least one complete cycle of all cylinders. This could be used to get a compression comparison to pick a weak cylinder. The cylinder number (at least No1) should be indicated on the graph. This would require a test option that disabled the fuel and ignition.
Power Comparison Test
As the engine is producing full power when accelerating from idle to full RPM (or any RPM in between) a graph of this in RPM V Time could be used to get an record of how the engine performs at any particular time. This would not give the actual HP but could be used as an indication of changes to performance after a change of settings/components.Accel fuel would need to be taken into account. A Swiss company use to produce a bench top dyno that use to work on this principle.

MV can read both of these but saving and comparing is extremely difficult, well beyond me. Also would be more user friendly if accessible while in TS rather than have to go to MV

[LT401Vette]

Sounds like you need to log crank angle and RPM. Some of the Hi Speed loggers do log both of those. So you could test your hypothesis. Make a dotRPM from that RPM.

My guess would be that during cranking you you be able to identify a cyl with compression off by a good deal. I doubt you would be able to identify power between cylinders.