So I know when adding a cam you need to decrease the VE in the lower RPMs and increase in the upper RPMs. I do have it sorted out in the upper range but some questions in the lower idle areas.
Noticing the spark does bounce quite a bit and believe this is because the VE is not quite right yet but would like some input on this. Also, when rolling off the throttle it sometimes stalls. In the car world we would add IAC. Is there something I need to configure on this?
The spark bouncing at idle, is from idle control, idle moving at rpm is from spark efficiency/torque control
What is the best way to fix?Originally Posted by MRRPMBRP
What are you wanting to fix?
I think he means fixing the spark bouncing at idle.
Spark moving around at idle is normal, as it is in about all efi electronic tb cars.
Completly agree with you. This is one of the ways it keeps the RPMs where it needs to be. Just seemed to be more than it should be. Got my VE dialed in and the KPA is now around 65-70 and the idle is much better and timing does not seem to jump around as much.
Still have a small issue where if I let off the throttle, RPMs drop and sometimes it is not able to recover and stalls. In say a Ford, I would increase IAC.
Increase sc tq, or reserve tq, or both
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