Timboj Posted February 25, 2023 Report Share Posted February 25, 2023 Hi guys, my Z is currently dyno-tuned for E85, but I have a flex sensor installed and I have a multi-fuel map setup, ready for me to tune on 98. The 98 tune (for now at least) will only be a backup if ethanol isn't available so I don't need it to be perfect. In fact I'd probably configure a rev-limit and other redundancies in case I forget I'm <70% ethanol or something like that. I'm currently using LTFT for my E85 map, but obviously if I start using a blend or 100% 98 I don't want LTFT to capture the trims. The question is, is there a simple way to only track LTFT while Multi Fuel Blend Ratio is above a certain threshold (eg. 80%)? Or is there a better method again? k fuku 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 25, 2023 Report Share Posted February 25, 2023 At present no. Im pretty sure there is a user lockout for LTFT coming in the next firmware release. Timboj and castillaricardo 2 Quote Link to comment Share on other sites More sharing options...
koracing Posted February 27, 2023 Report Share Posted February 27, 2023 Would it work by using a math channel as the closed loop lambda source? Or making a math channel one of the axes on a 3D update rate table? k fuku 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 28, 2023 Report Share Posted February 28, 2023 I think they still want the instantaneous CLL correction to take place, just not the long term learning and any bias from the LTT table. Quote Link to comment Share on other sites More sharing options...
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