oversteer Posted September 26, 2019 Report Posted September 26, 2019 Hello Planning to start up and run in a new motor shortly, I have fitted 60lbs hr(630cc) Siemens Deka injectors to run engine in, and then power tune will be using 2450cc Siemens Deka's on E85(car will be flex fuel, has sensor fitted). Question is how much re-tuning is involved with modeled fueling when i change the injectors ? Would it be quicker to setup the run in tune(will be on 98) with traditional fueling tables and go to modeled multifuel only when the final larger injectors are installed ? Cheers Quote
Adamw Posted September 26, 2019 Report Posted September 26, 2019 To get a quick tune in it I would run it in traditional or modelled mode initially (not modelled multifuel). Then when you change injectors you will switch to multifuel mode and tune both fuels correctly. Quote
cj Posted September 26, 2019 Report Posted September 26, 2019 if you tune it in modelled first, then change the injectors, as long as you update the tune with the new injector parameters it should still run moderately well. It wont be perfect so probably not worth getting it perfect on the smaller injectors though. Quote
oversteer Posted September 27, 2019 Author Report Posted September 27, 2019 Any one got any injector data for the Siemens 220lb FI114212 injectors ? These are 2 Ohm injectors, this ok with Thunder with no modifications ? Quote
Brad Burnett Posted September 27, 2019 Report Posted September 27, 2019 Why not just start your tuning with the new large injectors and not have to worry about the change once youre ready for the power tuning? Quote
Adamw Posted September 27, 2019 Report Posted September 27, 2019 23 hours ago, oversteer said: Any one got any injector data for the Siemens 220lb FI114212 injectors ? These are 2 Ohm injectors, this ok with Thunder with no modifications ? Yes, the Thunder will drive these no woories. Set injection setup to Peak & Hold, 4A peak, 1.5A hold. Deadtimes as below: Quote
oversteer Posted September 28, 2019 Author Report Posted September 28, 2019 Thanks again Any short pulse adder for these ? On another note, do LSU 4.9's need free air or calibration of any kind before use ? Quote
cj Posted September 28, 2019 Report Posted September 28, 2019 6 hours ago, oversteer said: do LSU 4.9's need free air or calibration of any kind before use 4.9 - no. 4.2's did need this though. Quote
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