5.3 Ignition settings 5 SETTING UP A BASIC CONFIGURATION
• 24 tooth on cam - many Japanese originated vehicles use the Nippon Denso 24 tooth CAS with differing
numbers of 2nd trigger teeth and sensors.
5.3.4.1 Terminology notes
• Missing tooth - This is a regular wheel with a group of "missing" teeth e.g. 12-1, 36-1, 36-2, 60-2
• on crank - the wheel is rotating at crank speed, normally directly attached to the crank pulley or flywheel
• on cam - the wheel is rotating at camshaft or distributor speed
• Single coil - a single coil and distributor
• Wasted spark - double ended coils (or a pair of coils) that fire twice per cycle
• Wasted-COP - a single coil per cylinder, but firing twice per cycle. Each coil is controlled by a separate wire.
Useful for testing out a dual wheel arrangement when you are uncertain of the cam phase.
• COP - a single coil per cylinder that fires once per cycle
• Batch/bank fire - groups of injector fired at once, not timed to a specific cylinder event
• Semi-sequential - injectors fired twice per cycle timed to cylinder events
• Sequential - each injector fires once per engine cycle timed to a specific cylinder event
5.3.4.2 Wheel naming There does not appear to be universal agreement on the way to name wheels among
manufacturers. In the MS3Pro documentation, we use a standard where a minus sign indicates missing teeth, a
slash indicates a separate wheel, and a plus indicates a tooth added to the same wheel. Here are some examples
of how this naming convention works.
• 36-1. This means a single wheel with place for 36 teeth and a single tooth omitted. i.e. 35 teeth at 10
(360/36) degree spacing.
• 36-2. This means a single wheel with place for 36 teeth and two adjacent tooth omitted. i.e. 34 teeth at 10
(360/36) degree spacing.
• 36-1-1. This means a single wheel with place for 36 teeth and two non-adjacent single tooth omitted. This
type of wheel is not supported by this generic wheel decoder. It requires a model specific decoder to specify
the separate gaps
• 36-2-2-2. This means a single wheel with place for 36 teeth and three sets of double missing teeth. This type
of wheel is not supported by this generic wheel decoder. It is supported as 36-2-2-2 with the specific OEM
pattern required.
• 24/1. This means 24 teeth (non-missing) on one wheel and a single tooth on a second wheel.
• 36-1/1. This means a one 36-1 wheel and a single tooth on a second wheel.
• 3+1. This means one wheel with 3 equally spaced teeth and an additional tooth to indicate sync. Not
supported by the generic wheel decoder.
5.3.4.3 Specific settings This covers just the settings used in Toothed Wheel mode; settings that are common
to all wheel decoders are covered under “Ignition Settings.”
• Spark Mode - set to "Toothed Wheel"
• Trigger Angle/Offset - always zero in Toothed Wheel mode. You’ll use the Tooth #1 Angle instead.
• Trigger wheel arrangement - see table above for correct settings
• Trigger wheel teeth - the number of effective teeth, counting the missing teeth as if they existed. i.e. a 36-1
wheel has 35 physical teeth, but enter 36, as you’re including the teeth that would populate the gap as well.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 65
To Next Page
Loading...