First time tuning a Fiesta (likely the last time once there’s nothing left) I’m mostly done tuning, probably over tuned as some may say... except the following details:
1. I’m fine tuning the behavior of the engine and throttle in several ways. First, is the shape of the WGDC Base, as for example power ramps up strong around 3,500rpm so I’ve made slight reductions in this range, and slight increases on the 3,000 side and 4,000 side to smooth it out. Then also throttle feel and response with very minor adjustments to Throttle Ramping Rate and Throttle Translation Accelerator Pedal Position. I’m always paying attention to the response and seem to be fine tuning all the time, very happy with it. AFR and Timing also influence this and the two are also related but I’m done in that area, just still may tweak those other three. So again there’s smoothness and also paying special attention to when warmed up tires break traction too easily in certain conditions, it’s a problem solving exercise of course.
2. COBB Spark Features — Switched from a 1D general application of spark advance with an activation threshold, to a 3D strategy recently which is always active but you can scale back the low power ignition advance. This is because compared to 91 or E10, E30+ doesn’t require as much advance reduction at high loads and high RPMs, so I wanted to have better control. I’m other words at idle and low power there may be 1 degree timing difference whereas at full throttle 200% load 6,000rpm it could be 6-7 degrees. Obviously the 1D table with say a 40% activation threshold does the same much rougher... but anyway, this is an area that seems to work but still have a lot of tweaking to do over time.