Tip-in Fuel Issues. Injector Dead Time Off?

[KSeries4Life]

KManager 4.3.5.0
KPro4 PRB ECU
K24/K20 swapped 2004 S2000
Magnus Sheet Metal K-Series Intake Manifold
90mm KTuned TB
Injector Dynamics 725
Return fuel system with KTuned FPR @ 60psi. No reference line.

I'm revisiting an old issue I've been having with getting lean spikes at tip in and oscillating or slowly rising/falling STRIM.

I've been trying to follow advice from posts Hondata has made about looking at whether fuel goes lean or rich just before overrun when slowly decelerating at around 2500 RPM. However, I'm just not seeing any consistency using that method. With the same dead time, sometimes it goes a bit rich and sometimes a bit lean. Also, I'm not seeing a huge difference when the dead time is changed drastically.

What I am seeing is that altering my dead times has a very consistent effect on my lean spikes at tip in. When I tune for that, I find that .97ms @ 14v gives me a near perfect tip-in. A very tiny lean spike followed by a very tiny rich spike. .98ms and above always gives me a prominent lean spike. I tried 1.26ms and my engine nearly dies when ever I tap the accelerator. The problem I am seeing with .97ms is that it gives me oscillating STRIM when ever I am cruising or idle. @ .98ms, I get no STRIM oscillation.

Need some dead time tuning advice... Or possibly I need to mess with the TPS Tip in Fuel? With my 90mm TB, at low RPM I get full atmospheric pressure with only ~25% throttle.

[d_butl3r]

sounds like the fuel table itself may need addressing...

there also might not be enough resolution down low due to the setup you have...