Quote:
Originally Posted by Ebush
While working on my idle tuning today I realized just how jacked up this base map actually is. Target AFR along with a a bunch of other items are utilizing CABLE throttle position sensor for the data. So essentially the whole damn AFR map and a few others were completely useless, car runs much better after switching over to DBW TPS in each menu. I truthfully hadn’t done any data logging prior to today. The car ran great and felt slightly faster than with the fa20. But when I noticed the AFR staying super rich at the top of 5th gear I decided to investigate. Previously I had just glanced over during a couple pulls and saw that AFR looked good but I wasn’t looking over at 8k.
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Shouldn’t the TPS to AFR map be the same regardless? The difference with DBW is a person could modify the throttle position to be different than the accelerator position in a way where they are not 1:1. Like a cable system would be linked to the accelerator in a 1:1 ratio, but airflow through the throttle body wouldn’t be 1:1 because of the nature of airflow being greater in the middle and less towards the end of throttle opening, but DBW can be set up to deliver a linear feeling to airflow through the throttle body, and that requires a more exponential input curve for throttle body opening relative to the linear accelerator input. Regardless, AFR at 80% throttle should always be the same, right?
Were you altering the map or just looking at an identical map with a different value? Sorry, I haven’t dug into the software yet, or I would look myself. Still fabricating.