Quote:
Originally Posted by thambu19
@ steve99
Are the negative values real? I mean does the the cam actually go there? I thought the rage of authority was only from 0-40deg for intake.
In that case the negative values could be a strategy to force the cams to go to their end-stop or lock-pin positions where Duty cycle = 0. Next time you log data in that area can you check if the DC goes to 0 at this region? This will be a strategy to learn end-stop location so that the ECU can learn the shift in position if any due to tolerance limitations part to part or even chain stretch when it happens on a newer engine. I see that exhaust does not use it. Not sure why not. |
IIRC the Intake cam 0 position is 10 degrees from minimum, ie it can go to -10. Cam calibration is done within the 1st minute or so after reflash at idle.
Regarding AVCS tuning, go for this thread:
http://www.ft86club.com/forums/showt...highlight=AVCS