Aem 30-6905 Universal Programmable EMS-4 Bedienungsanleitung Seite 20
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Page 20 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
((Power x BSFC) x (1 + Safety Margin))/Number of Injectors = pounds/hour
An example of this equation is:
6 CYL. engine rated at 500 hp on gasoline using moderate boost with a 15% safety margin on
the injector
500 x .625 = 313 lbs/6 = 52 lbs/hr/ injector. 52 x 1.15=60lbs/hr/ injector
If we take the flow of the injector (60 lbs/hr) and multiply it by the number of cylinders (6), we
arrive at a total of 360 lbs/hr of flow. As you can see, the fuel pump described in the fuel pump
sizing section referenced above has enough capacity to feed the engine with a little room to
spare.
It is a good idea to know the maximum operating pressure of the fuel injectors. In some cases
the fuel injector will not open if the fuel pressure exceeds the design limit of the injector. Also, at
the higher pressures the injector fuel flow may become non-linear and cause inconsistent fuel
delivery, usually creating a lean condition. Most injectors can withstand up to 70 psi. Many of
the pintle style injectors can withstand higher pressure.
In the fuel injector sizing, always use a safety margin between 15-20%.
Harness Connections
Injector Harness Connections
Name
Wire
Wire
Color
Stamping
Injector #1
22
Orange
INJ 1
Injector #2
22
Orange
INJ 2
Injector #3
22
Orange
INJ 3
Injector #4
22
Orange
INJ 4
Fused Injector Power
14
Red
INJ POWER
INJ1 – Connect to 1
st
injector to fire.
INJ2 – Connect to 2
nd
injector to fire.
INJ3 – Connect to 3
rd
injector to fire.
INJ4 – Connect to 4
th
injector to fire.
INJ POWER – Fused injector power. Splice required number of power leads and distribute to
each injector.
- EMS P/N 30-6905 1
- Revision History 2
- Table of Contents 3
- General Information 6
- Electronics Warranty 6
- Part 1 – EMS-4 Installation 7
- Grounding 17
- USB Connector 18
- CAN Connector 19
- Injectors 19
- Injector Harness Connections 20
- Coil Harness Connections 22
- Coil Driver Connections 24
- FALLING 25
- EDGE FIRE 25
- RISING EDGE 25
- MAP Sensor 26
- Air Temp Sensor 27
- Crank Sensor 29
- Hall Effect voltage signal 30
- Cam Sensor 33
- Vehicle Speed Sensor (VSS) 34
- DO NOT CONNECT 36
- DIRECT TO BATTERY 36
- Part 2 – AEM Tuner 37
- AEM Tuner 39
- Basic Terminology 40
- Menu Items 42
- Calibration Notes 43
- File-Workspace 43
- Edit Menu 44
- Display Menu 45
- Display Explorer 45
- Coils Display 46
- Injectors Display 47
- AEM Tuner Tabs 47
- Tabs Menu 48
- Tabs Menu Detail 48
- EMS Menu 49
- Upload Calibration Dialog 50
- Set Password Dialog 51
- Logging Menu 52
- Tools Menu 56
- Configure Outputs Dialog 56
- Output Activation Criteria 57
- Telemetry Setup Menu Items 58
- Compare - Open File Window 59
- Calibration Compare Dialog 59
- Compare Calibration Detail 59
- Configure Conversion Dialog 61
- Unit Preferences 62
- Unit Preferences Detail 62
- Display Preferences 63
- Hotkey Preferences 64
- Hotkey Detail 64
- Logging Preferences 65
- Calibration Edit Preferences 66
- Quick Tune Preferences 67
- Application Preferences 68
- Wizards Menu Item 69
- Setup Wizards 70
- Configure Gear Ratio Wizard 73
- Live Tracing Menu 74
- Help Menu 75
- AEM Tuner Updates Feature 76
- Editing Options Displays 77
- Available Options 78
- Selected Options 78
- Editing 2D Table Displays 81
- Editing Channel Displays 89
- Editing 3D Map Displays 90
- Part 3 – Tuning Guide 98
- Timing which 99
- Calibration Setup 100
- Timing Pattern Basics 101
- A more complex example 106
- Set up RPM and Load axes 114
- EFI Sensors 115
- Air Temperature Sensor 119
- Water Temp Sensor 120
- (Oxygen) Sensors 120
- Knock Sensor 125
- Sensor Calibration 126
- Set Throttle Range Wizard 131
- Fuel System Setup 134
- Fuel Pump Sizing 135
- Fuel Pump Location 136
- Fuel Hoses and Routing 136
- Fuel Delivery Hose Sizes 137
- Fuel Filter and Fuel Rail 137
- Basic Tuning 142
- Ignition Synchronization 146
- Ignition Timing Sync Wizard 147
- Idle Air Control 150
- Typical Idle Setup Tab 151
- Fuel Tuning 158
- Ignition Tuning Theory 182
- Ignition Map 193
- Ignition Trims 193
- Vehicle Speed 197
- EMS-4 GPIOs 199
- Data logging 209
- Logging Conditions 213
- Logging Custom Conditions 214
- Log Switch Settings 214
- Download EMS Log Menu Item 215
- Advanced Tuning 216
- Knock Control 231
- Traction Control 233
- 2Step Rev Limiter 242
- O2 Feedback 245
- 2-D Tables for O2 Feedback 247
- O2 FB 249
- Nitrous Control 252
- Anti-Lag 256
- Analog Input Switch 259
- Staged Injection 260
- Switched Ignition Retard/Cut 266
- Switch Rtd Step: 268
- Glossary of Terms 269
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