Grant Baker Posted February 20, 2021 Report Share Posted February 20, 2021 Hi Usually for mapping an ITB engine, I'd choose TPS vs RPM for fuel mapping. If adding boost, I'd add a 4d table for compensation. However, what about a supercharged engine with ITBs? Part of me thinks TPS as load is fine without 4d as boost will generally be related to RPM and throttle anyhow? Anybody done this and run with 4d? If so, any examples of the 4d table? Or would you just let the ECU do the "heavy lifting" in the background, bearing in mind boost cannot be changed like on a turbo charger? Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 21, 2021 Report Share Posted February 21, 2021 If its a positive displacement blower it will most likely not need a 4D table, if it does I suspect it will only be very small tweaks in small areas. Fully tune the main fuel table with 4D off or zeroed out, then drive it under some varying conditions to see if any other compensations are needed. Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted February 21, 2021 Author Report Share Posted February 21, 2021 Thanks Adam. Would you use TPS as load? Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 21, 2021 Report Share Posted February 21, 2021 Equation load source should be set to MAP. Use TP on the fuel table Y axis and MAP or MGP on the lambda target table. Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted February 21, 2021 Author Report Share Posted February 21, 2021 2 hours ago, Adamw said: Equation load source should be set to MAP. Use TP on the fuel table Y axis and MAP or MGP on the lambda target table. Thank you. That is what I have set it to already. Again - thanks for your continued support! Quote Link to comment Share on other sites More sharing options...
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