Overview
Purpose of this document is to explain the tuning tables available in v1.0 of the bootmod3 CustomROM for the S55 engine.
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Before opening any tables, let’s first review what tables we’ve got we have currently available for Map Switching, Flex Fuel and AntiLag that mirror the factory logic of Map Slot 1 for other map slots and from there we know what we have that we can work with (**NOTE: Tables shown are v1.0 of the CustomROM):
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We can see there are currently around 40-50 tables that are mappable in per Map Slot 2. This is the same for Map Slots 3 and 4 and if required more map slots could be added in a future release. We’ve chosen this set of tables to be what we’ve felt to be the foundation of key tables that allow for changes in tuning when it came to different power levels on the same or different octane. For example, Map Slot 1 could be the 91 octane map, Map Slot 2 could be calibrated for MS109 Race gas, and so on.
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Final Base Ign. Timing Target (After Blend Factor) = Map2 Ign. Target + (Flex Fuel Ign Target - Map2 Ign. Target) x Blend Factor for Ignition |
Putting this into actual values for our example at 7500rpm and 220 Load:
Final Ignition Timing Target for 50% ethanol on Map Slot 2 with Flex Fuel Enabled = 10 + (16 – 10) x 0.7 = 14.2 deg
You can see how the underlined portion easily allows for dynamic blending based on ethanol blend factor table setup between the base map table and the flex fuel table in this case.
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Ethanol Content Sensor Override on LiveAdjust Screen: In the case of a Flex Fuel sensor or ECA device failure, we’ve added a way for the users to override the ethanol content % value seen by the DME. This overrides any existing sensor value and is to be used with ** CAUTION ** and only in the cases where for instance vehicle will not start up on a full tank of ethanol and the sensor has become faulty. Some have reported wanting to use the override when at race events where the ethanol % of the fuel in the tank is WELL known and having a chance of a sensor failure ending up in poor results is not an option. ** Override disables with ignition in the OFF position. |
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FLEX FUEL HARDWARE SETUP REQUIREMENTS **
To allow for Flex Fuel tuning, an Ethanol (alcohol) fuel sensor and an Ethanol Content Analyzer (ECA) CANBus device need to be connected to the vehicle’s PT-CAN. Overview of the how the sensor data travels looks as follows:
Continental Flex Fuel Sensor → CANBus Enabled ECA Board → CANBus (PT-CAN) → DME running bootmod3 CustomROM Flex Fuel sensor can be installed on the feed line as the factory S55 fuel system is return-less. If using the feed line, it is strongly recommended to use a splitter in the line where the sensor is installed to avoid introducing any fuel flow restrictions at higher power levels with higher fuel volume demand. |
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bootmod3 New RAM Channels For Datalogging (only CustomROM):
BM3 Antilag Active
BM3 Flex Blend Factor (Fuel)
BM3 Flex Blend Factor (Ign.)
BM3 Flex Blend Factor (Trq.)
BM3 Flex Ethanol %
BM3 Flex Ethanol % (Sensor)
BM3 Flex Fuel Temp
BM3 Flex Sensor Fault
BM3 Fuel Corr. (Base)
BM3 Fuel Corr. (Final)
BM3 Fuel Corr. (Flex Adder)
BM3 Map Slot
bootmod3 Updated RAM Channels For Datalogging (all MEVD17.2 based vehicles, S55 specific list below):
(RAM) Boost Pressure (Target)
(RAM) Boost Setpoint
(RAM) Boost Setpoint (AppMode)
(RAM) Engine Speed
(RAM) Fuel Delivery Rate (lph)
(RAM) Fuel Inj. Corr.
(RAM) Fuel Inj. Timing (End)
(RAM) Fuel Inj. Timing (Start)
(RAM) Fuel Injection Angle 1
(RAM) Fuel Injection Angle 2
(RAM) Fuel Injection Angle 3
(RAM) Fuel Injection Angle 4
(RAM) Fuel Injection Angle 5
(RAM) Fuel Injection Angle 6
(RAM) Fuel Injection Duration (Corrected)
(RAM) Fuel Mass Rel. (Corr.) 1
(RAM) Fuel Mass Rel. (Corr.) 2
(RAM) Fuel Mass Rel. (Target)
(RAM) HPFP (Actual)
(RAM) HPFP (Target)
(RAM) HPFP Pressure Control Deviation
(RAM) HPFP Regulator (I-Gain)
(RAM) HPFP Regulator (P-Gain)
(RAM) HPFP Regulator Output
(RAM) Ignition Timing (Target)
(RAM) Ignition Timing Corr. (Total)
(RAM) Ignition Timing Corr. Cyl. 1
(RAM) Ignition Timing Corr. Cyl. 2
(RAM) Ignition Timing Corr. Cyl. 3
(RAM) Ignition Timing Corr. Cyl. 4
(RAM) Ignition Timing Corr. Cyl. 5
(RAM) Ignition Timing Corr. Cyl. 6
(RAM) Ignition Timing Mode (Spool)
(RAM) Lambda (Base) Bank 1
(RAM) Lambda (Base) Bank 2
(RAM) Lambda Bank 1
(RAM) Lambda Bank 2
(RAM) Lambda Labas Switch
(RAM) Lambda Level 1 Bank 1
(RAM) Lambda Level 1 Bank 2
(RAM) Lambda Level 2 Bank 1
(RAM) Lambda Level 2 Bank 2
(RAM) Lambda Main (Target)
(RAM) Lambda Status
(RAM) Load (Actual)
(RAM) Load (Limit)
(RAM) Load (Target)
(RAM) MAF After Corr. (Target)
(RAM) MAF HFM
(RAM) MAF Pre-Turbine (Actual)
(RAM) MAF Pre-Turbine (Target)
(RAM) MAF Turbine (Actual)
(RAM) MAF Turbine (After Temp Corr.)
(RAM) Rel. Fill (Actual)
(RAM) Rel. Fill (Target)
(RAM) Torque at Clutch (Actual)
(RAM) Torque at Clutch (Target)
(RAM) Torque at Clutch (Target) (Pre-DrivDynmcs)
(RAM) Torque Limit Active (Flag)
(RAM) Torque Max Request
(RAM) Turbine Distribution Factor (Turbine/Wastegate)
(RAM) Turbine Power (Actual)
(RAM) Turbine Power (Compressor Map)
(RAM) Turbine Power (D-Gain)
(RAM) Turbine Power (I-Gain) (AppMode)
(RAM) Turbine Power (P-Gain)
(RAM) Turbine Power Adder (P-Gain)
(RAM) WGDC (After Corr.)
(RAM) WGDC (Base)
(RAM) WGDC (D-Gain)
(RAM) WGDC (I-Gain)
(RAM) WGDC (P-Gain)