Understanding the "Injector Calibration" tab of Vemstune

[dnb]

I have been looking at this recently and want to make sure I am reading the data correctly.

I think the bar chart shows the tooth timings for each cylinder (in firing order) such that negative numbers and shorter bars indicate the crank is going faster for a particular firing cycle, and longer bars with positive numbers indicate a slowing down.  Presumably these are differences from some kind of rolling average calculated by VT?  I should then in theory be able to use this logged data to adjust the individual cylinder trims to bring all the cylinders into line.

[Denmark]

It could be possible if the trigger setup is done right

I positive that on a subaru setup the calculation is wrong
As there is always 2 cyl that are higher or lower then the other 2
That is also on a brand new engine , so
Every subaru engine i have made , eighter have difference cyl pressure right to left ,
OR the calculation is wrong


/Skassa

[VEMS]

Hello Dnb,

The individual power gauge shows the relative rpm period in TIME difference between cylinders not against average but against each other. If a properly balanced triggerwheel is used it will give you a good indication of power produced (or rather power diff) between cylinders.

Useful for:

* detecting which cylinder miss-fires
* balancing injector trim (offset)
* detecting uneven home made trigger wheels.

Best regards, Dave