There should be 2 versions of cutting the rpm reading in half on the pcv.
(intake, compression, power, and exhaust) 4 stroke cycle*
So this means that the piston goes up and down twice in one 4-stroke cycle. The stock ecu only fires the ignition one time in a 4-stroke cycle (piston goes up and down twice and the stock ecu only ignites the spark plug once). But that means the crank sensor went by twice and the stock ecu only fired the spark plug once. The procom ecu (im using) just fires the spark plug ever time the crank sensor goes by. Therefore firing the spark plug twice as much as the stock ecu would have.*
Now the pcv determines the rpm rate by the rate of the spark plug ignitions from the ecu and this ecu (procom) is doubling what the stock ecu would have put out, so the pcv is doubling the amount of fuel that should be there. Its injecting fuel on the intake and exhaust stroke just because the procom ecu fires the spark plug on the exhaust stroke (wasted spark).
I should have said upfront that i have a single cylinder engine. A single cylinder engine usually only ignites spark on the combustion stroke not the exhaust stroke. The ecu i have is igniting the spark plug on both the combustion and again on the exhaust stroke.
*In wasted spark this would be alternated between opposing cylinders but in a single cylinder its not able to alternate because there are no other cylinders and this means it just fires the same spark plug twice.*
The ecu ignites the spark plug based on the signal from the crank sensor and the pcv gets the rpm reading from the frequency of the spark plug ignitions from the ecu.*
This is why i say there should be two versions and only one will be correct. Since your going to scale the rpm to .5 which would be half the rpm signal im currently getting from the ecu, then your going to effectively use one spark and skip one. I need to be able to choose which spark to keep because only the spark on the combustion stroke will work. However scaling the rpm to .5 is exactly what needs to be done.*
Thanks for your help and please ask me if i can help elaborate if any more info is needed.
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