Quote:
Originally Posted by mb911
Dan so back on topic. I also embarked on EFI this spring and went with the poorman solution and used my carbs as TBs and MS2 with a base map. It has been a good learning curve but I very happy with the results. Easy starting, great power, easy adjustability. So far the biggest hiccup was mismatched banks from throttle linkages and I have corrected that now. My question for you is do you think the dyno was worth the time and money or did autotune and big hills/foot on the brake seem effective enough? I have found the latter to work really well for me.
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Hi Ben,
In the last post I said I thought a dyno session is good value for the money, then I reread your post and I want to add that if you are using the ECU to control the fuel injection only, then tuning the EFI with the big hills/foot on the brake technique is adequate if you are happy with your results.
I bought Al Kosmal / X-Faktory's Option#2 conversion package that added ECU ignition control to the ECU fuel injection control, so dyno tuning made sense for me to optimize the timing settings.
Here is a photo of the ignition table before dyno tuning using timing values from the characterization of the distributor mechanical advance curve before I started the CIS to ITB EFI conversion project:
Here is a photo of the ignition table after dyno tuning using timing values derived from timing sweeps to determine MBT (max brake torque) at various combinations of rpm and load:
