Haltech E8 - Manual (Page 26)

Haltech E11/E8 Instruction Manual
• Rev Limit Type – Select which output the Rev Limiter will use - Fuel or Ignition.
Note: Be careful when using “Ignition” for Rev Limiting on vehicles with
Catalytic Converters. Unburned fuel can overheat and damage the
converter.
• Rev Cut Type – The method for cut-out to Ignition or Fuel can be either Hard or Soft. Hard cut is
an instant stop to Fuel or Ignition and Soft Cut is a progressive or gradual cut (see figure xx).
Selecting Hard Cut with Fuel as the Rev Limit Type, the injection time will be set to Zero if the
RPM exceeds the value set in the RPM Limit field. If Ignition is used as the Rev Limit Type, then
spark charge Time will go to Zero when RPM exceeds the value in the RPM Limit field. When
using Soft cut, you can choose the type of sequence or aggressiveness of the cut by selecting
Linear, Hard to Soft, Soft to Hard or a Custom style.
Figure 25 - Soft Cut Rev Limiter
Miscellaneous Group
• Engine Operating Temp - When the coolant temperature is below this temperature, the engine is
considered to be cold. Features such as injector primes that depend upon operating temperature
will use this temperature to decide if the engine is at operating temperature.
Throttle Group
• WOT Value % - Wide Open Throttle (WOT) value. When using Full Throttle Maps, this threshold
defines over what percentage a full throttle map will work at. Example: if you set WOT value say
95% and WOT Map is enabled (Setup/Fuel Setup/Maps Group), when the Throttle position
exceeds 95% the Full Throttle Map will take effect.
• Throttle pump Dead Band - Some Throttle Position Sensors (TPS) may have some residual
noise. When watching the Engine Data page you may notice the TPS value move slightly even
when no physical throttle movement is present. In some cases having a worn throttle shaft or
multiple throttle bodies, engine vibration may cause throttle movement which can trigger a Throttle
Pump Correction (causes an unexpected rich fuel mixture at idle or at a light load). If you think this
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4900 5000 5100 5200 5300 5400 5500 5600
Soft to
Hard
Linear
Hard to
Soft