Haltech F9A User Manual Page 35
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34
Chapter 4
Adjusting Haltech Maps
The tutorials presented in this chapter are examples of how you might use the available
functions to make typical modifications to the maps. These tutorials are aimed at explaining
both why and how some typical changes might be made. They assume that you have the
software running Online on your PC, with the ECU powered and connected via the supplied
programming cable.
4.1 What are maps?
The injection times needed by the engine at different conditions is stored by the F9 in a table
of numbers called a look-up table. The F9 determines the engine's load and speed, and uses
these two parameters as an index to the table. This table is called the Fuel Map. For
instance, at an engine speed of 4000 rpm and at -20kPa, the relevant number in the table
may be 4.35. If the engine approximates -20kPa at 4000 rpm, then the computer will extract
the value of 4.35ms from the table as the base injection time. This value is then adjusted to
compensate for numerous conditions, such as temperature or acceleration, and then the ECU
holds the injectors open for that time on the next injection.
It is possible to programme the F9 by directly changing the value of each number by
programming in the numerical mode, but this can be extremely difficult, so the Haltech
allows you to change the numbers by manipulating graphics in maps presented as bar
graphs. (This is much simpler and allows you to visualise the map)
Since it is difficult to interpret all the table's values at once, the programming software
divides the map by engine speed into a series of rpm ranges. Within the range, each load
point is represented by a vertical bar. Thus, when you view a range from the Fuel Map, you
see a bar chart of injection time versus load for all the load points in the table at that speed.
There are other tables in the F9, such as those used for temperature corrections. They are
indexed by only one parameter, and so are not divided into ranges. These tables are also
called maps.
4.2 What is mapping the Engine?
Mapping the engine is filling the look-up tables with the correct values for your engine. This
is done by adjusting the heights of the bars within the maps. Bars may be adjusted one at a
time, or in groups. The Haltech programming software has been designed to make engine
mapping as simple and intuitive as possible.
- Contents at a Glance 2
- F9 Table of Contents 3
- F9A Table of Contents 7
- Before You Begin 9
- Tool/Supply Requirements 10
- How It Works 10
- Haltech F9 Specifications 13
- SECTION ONE 16
- Getting Started 16
- Haltech F9 Installation 16
- 1.2 Installation Summary 17
- 14mm x 1.5 20
- 1.3.6. Power Relays 22
- 1.3.7. Fuse Block Assembly 22
- 1.3.9. Flying Leads 24
- 1.3.12 Connect the ECU 26
- Getting Online 27
- Dy or %y 28
- LQVWDOOy 28
- 2.4 Using the System Online 30
- 2.5 The Main Menu 31
- 2.6 How to Quit 31
- Engine Identification 32
- Adjusting Haltech Maps 35
- 4.3 Using the Software 36
- 4.4 Accessing the fuel maps 36
- HALTECH F9 Fuel Map 38
- 4.5 How To Quit 39
- 4.6 Time Saving Functions 39
- } key 40
- 4.7 Duty Cycles 42
- Starting the Engine 45
- 5.3.1 Tuning for Idle 46
- 5.3.2 Tuning with No Load 46
- 5.3.3 Loading the Engine 46
- 5.3.4 On the Dyno 47
- 5.3.5 On the Road 47
- 5.3.6 Fine Tuning the Engine 47
- HALTECH F9 Fuel Map 48
- HALTECH F9 Fuel Map 48
- SECTION TWO 49
- Other Adjustable Features 49
- Throttle Effects 49
- 6.2 Zero Throttle Map 50
- 6.3 Full Throttle Map 51
- Cold Starting and Running 52
- Correction Factors 54
- 8.3 Barometric Correction 55
- 8.4 Post Start Enrichment 56
- SECTION THREE 57
- Software Features 57
- File Storage and Retrieval 57
- 9.3 File Management 58
- 9.3.2 Changing Directories 59
- Printing Maps 60
- DataLog 61
- 11.1.3 Viewing the Datalog 62
- 11.1.5 Printing Datalogs 63
- Customising the Software 64
- SECTION FOUR 65
- Appendices 65
- Troubleshooting 65
- A.3 Starting problems 67
- A.4 Idling Problems 67
- A.6 Full Power Problems 68
- A.7 Throttle Response 68
- A.8 Cold Running Problems 69
- A.9 Fuel Consumption 69
- Injector Impedance 70
- Fuel Systems & Staging 72
- C.3 Injector Staging 73
- C.4 Fuel Pump Capacity 74
- Appendix 76
- WiringDiagrams 76
- F9 PRIMARY HARNESS - ELEC 77
- HALTECH 78
- Introduction 79
- Wiring Notes 80
- Using the Software Features 81
- Idle Speed Control 82
- Closed Loop Control 84
- Auxiliary Outputs 87
- Using the Boost Controller 89
- 5.10 Turbo Timer (TT) 97
- Wiring Diagrams 98
- LIMITED WARRANTY 99
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