Search found 6 matches
- 09 Apr 2023, 20:59
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Re: VS M4.4 tuning dead? Start again here?
Hello everybody! If there are programmers or people here who understand how to edit XDF files correctly, then it would be good to add a function for selecting the fan response temperature in motronic 4.4. Because due to the high fan response temperature (105 degrees Celsius), there are many problem...
- 25 May 2023, 15:13
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Re: VS M4.4 tuning dead? Start again here?
"automatic transmission gearshift speed programmatically". I would wait like these happens in transmission module not in ECM. TCM sends example reduce torque signal to ECM but people who tuned M4.4 can flash more details what in ECM side as this was my quick take top of my head.. not in de...
- 12 Sep 2023, 09:57
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Re: VS M4.4 tuning dead? Start again here?
I know VAST has an option in his ECUs for an alternate mapset- Alternate Mapset: A second map set, allowing you to switch injector calibrations, fuel map, ignition map and boost maps on the fly, without the need to flash a new tune. Usually this is used for a gasoline and E85 map, but can be used fo...
- 13 Sep 2023, 12:04
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Re: VS M4.4 tuning dead? Start again here?
I'd have to dig back in the VS thread, but I think the base "DIY M4.4" stuff has the selectable maps, but I could be wrong. I know there are alternative maps listed in the XDF. I don't remember how you select them though. In run all of my turbo cars on the 93 PON octane. This is equivalent...
- 15 Apr 2024, 06:25
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Re: VS M4.4 tuning dead? Start again here?
Hi! Dear Chuck, can you please send me BIN files for m4.4 from S/V/C70 with a mechanical throttle? Maybe there were earlier discussions about the firmware for these cars that I missed. Or maybe you had a tuned firmware for the 850 and the 15G turbine with automatic transmission. Also, maybe you hav...
- 22 Apr 2024, 19:30
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Re: VS M4.4 tuning dead? Start again here?
As mentioned, the Target Load Setpoint is the desired engine loading (which is not boost pressure) and the TC Duty Cycle is how much/quickly the ECU allows the system to work to get to that point. Lower duty cycle values = slower response/build. (The TCV is basically a modulated bleed orifice to con...






