Has anyone tuned or increased the dwell time when going to e85/boost?
For background:
I had an occasional misfire on cyl 6 usually around WOT @ 6500+ RPM per the DTC event stored. For ignition, I'm running the latest Eldor Coils and IXU24's gapped @ .021" , Boost at 3 psi. The car is turbocharged on ~E85. The car was previously running the HPF/AEM v1 setup, now it's on the OEM DME + Supporting mods (MAF etc)
For cyl 6, I reduced the gap down to .019" and all is well.
Then I started thinking: "What was the AEM/HPF ECU using for dwell time on the previous setup as I never really had misfire issues at boost"
Current Tune (OEM) Dwell Time (ms)
0 -> 7000 (rpm)
------------------------------------------
10v -- 1.63 1.63 1.63 1.63 1.63
12v -- 1.28 1.28 1.28 1.28 1.28
14v -- 1.05 1.05 1.05 1.05 1.05
The HPF/AEM dwell was more around 2-2.5ms
Then I found this great write-up on various coils/brands from the S54/N54/S55/B58
This suggests I can run the S54/N54/N55 coils to 2.5ms to maximize the spark energy output. It will increase load(heat) on the ignition transistors.
Source:
https://nexsysmotorsport.com/blog/ig...gy-comparison/
For background:
I had an occasional misfire on cyl 6 usually around WOT @ 6500+ RPM per the DTC event stored. For ignition, I'm running the latest Eldor Coils and IXU24's gapped @ .021" , Boost at 3 psi. The car is turbocharged on ~E85. The car was previously running the HPF/AEM v1 setup, now it's on the OEM DME + Supporting mods (MAF etc)
For cyl 6, I reduced the gap down to .019" and all is well.
Then I started thinking: "What was the AEM/HPF ECU using for dwell time on the previous setup as I never really had misfire issues at boost"
Current Tune (OEM) Dwell Time (ms)
0 -> 7000 (rpm)
------------------------------------------
10v -- 1.63 1.63 1.63 1.63 1.63
12v -- 1.28 1.28 1.28 1.28 1.28
14v -- 1.05 1.05 1.05 1.05 1.05
The HPF/AEM dwell was more around 2-2.5ms
Then I found this great write-up on various coils/brands from the S54/N54/S55/B58
This suggests I can run the S54/N54/N55 coils to 2.5ms to maximize the spark energy output. It will increase load(heat) on the ignition transistors.
Source:
https://nexsysmotorsport.com/blog/ig...gy-comparison/