The Holley Lightweight Dominator ECU uses a lighter potting material than the standard Dominator unit, cutting overall weight by 1.8 lbs (34%, down to 3.53 lbs). It's built specifically for drag racing and is not recommended for high-heat, under-hood mounting or applications with high continuous current draw.
Key Features:
- Lightweight potting reduces ECU weight by 1.8 lbs (34%), ideal where every ounce counts
- Works with 4, 6, 8, and 10-cylinder engines
- Ignition plug-and-play with GM LS (non-VVT), GM HEI, Ford TFI, Coyote (non-VVT), 4.6/5.4 Mod Motor, late-model HEMI, and magnetic/hall-effect trigger
- Integrated electronic transmission control for GM 4L60E/4L80E and Ford AODE/4R70W
- Integrated drive-by-wire throttle body control for two DBW throttle bodies, compatible with GM, Chrysler, Ford, and Nissan
- Integrated dual-channel wideband oxygen sensor control, monitors both engine banks with NTK or Bosch sensors
- Twelve sequentially driven 8:2 peak-and-hold injector drivers, supporting up to 24 low or high impedance injectors
- Twelve-channel Distributorless Ignition (DIS) outputs
- 1-7 Bar MAP sensor capability for naturally aspirated or boosted applications
- Individual cylinder fuel and spark control
- Store and select between four calibrations with the Multi Map Selector, part number 558-407
- Fully featured boost control and nitrous control eliminate the need for separate controllers
- Extensive inputs/outputs: 13 multi-inputs, 30 0-5V sensor inputs, 4 speed inputs, 20 12V PWM outputs, 16 ground PWM outputs
- Fully user-configurable tuning tables: 1D, 2D, 1D per gear, 2D per gear
Specifications:
- Recommended Use: Drag racing only; not recommended for under-hood/high-heat mounting or high continuous current draw applications
- Weight Savings: 1.8 lbs (34%) versus the standard Dominator ECU
- Ignition Compatibility: GM LS (non-VVT), GM HEI, Ford TFI, Coyote (non-VVT), 4.6/5.4 Mod Motor, late-model HEMI, magnetic/hall-effect
- Transmission Control: GM 4L60E/4L80E, Ford AODE/4R70W
- Drive-By-Wire: Yes, up to two throttle bodies
- MAP Sensor: 1-7 Bar
- Length: 13.14" overall
- Width: 6.10" overall
- Height: 1.00" to 1.84" (variable)
- Mounting Bolt Pattern: 12.13" x 6.10"
- Part Number: 554-114LW
Dominator EFI systems are sold a la carte — a complete system requires the ECU, main power harness, wideband oxygen sensor, main engine wiring harness, injector wiring harness, ignition adapter harness, and related accessories purchased separately. When using a trans brake, Holley requires a relay or its trans brake input protection device, part number 554-128, to protect the ECU from flyback voltage.
FAQ
Is the Lightweight Dominator ECU suitable for a street car?
No, it's intended for drag racing only and is not recommended for under-hood, high-heat installations or applications with high continuous current draw.
How much weight does the lightweight potting save?
It reduces the ECU's weight by 1.8 lbs, about 34% lighter than the standard Dominator unit, bringing it down to 3.53 lbs.
Does this ECU include the wiring harness?
No. Dominator EFI systems are sold a la carte — the main power harness, wideband oxygen sensor, engine wiring harness, injector harness, and ignition adapter harness are purchased separately.
Can it control an automatic transmission?
Yes, it has integrated electronic transmission control for GM 4L60E/4L80E and Ford AODE/4R70W transmissions.
How many cylinders can it support?
It works with 4, 6, 8, and 10-cylinder engines.
Do I need extra protection when running a trans brake?
Yes, Holley requires a relay or its trans brake input protection device, part number 554-128, to protect the ECU from flyback voltage when the trans brake is released.
