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Holley

Holley HP EFI Stealth Ram MPFI Fuel Injection System Chevy V8

Holley HP EFI Stealth Ram MPFI Fuel Injection System Chevy V8 550-820 - Small Block Chevy, Early to Late Heads, Range Up To 500 HP 550-823 - Small Bloc
HolleyHolley HP EFI Stealth Ram MPFI Fuel Injection Syst

Holley

Holley HP EFI Stealth Ram MPFI Fuel Injection System Chevy V8

From: $2,717.95
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BrandHolley
Description

Holley HP EFI Stealth Ram MPFI Fuel Injection System Chevy V8


550-820 - Small Block Chevy, Early to Late Heads, Range Up To 500 HP
550-823 - Small Block Chevy, Early to Late Heads, Polished, Range Up To 500 HP
550-825 - Small Block Chevy, Vortec Heads, Range Up To 500 HP
550-828 - Small Block Chevy, Vortec Heads, Polished, Range Up To 500 HP


You'll get some attention when you pop the hood and show an HP Stealth Ram Multi-Point EFI system! Available for traditional or Vortec headed SB Chevys. Simply utilize a laptop (or the optional 5.7" full color touch screen LCD) along with the HP's self-tuning capabilities to make it easy as 1, 2, 3 to get your car up and running with EFI. The tunnel ram design of the Stealth Ram builds power in the upper RPM while maintaining excellent mid-range torque as well. HP Stealth Ram systems include: intake manifold, billet throttle body, ECU, wiring harness, fuel rails and related small parts. Fuel pump and Injectors should be selected separately to fit your requirements.


Installation Notes:
ECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance.


Holley HP EFI systems are equipped with 4 programmable inputs and 4 programmable outputs that are ideal for most vehicles with a single power adder. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous, water/meth injection, speed inputs, fuel pump control, AC inputs, timing retard inputs and various other uses. When selecting an ECU, users need to ensure their planned controls can be run with the 4 inputs and 4 outputs as certain combinations may use more I/Os than are available. If more I/Os are required, users should choose the Dominator VMS.


Features:

  • Optional 5.7" full-color touchscreen LCD allows easy on-the-fly tuning, data-logging or can be used as an easy to see graphical gauge panel
  • Eight sequentially driven 8:2 peak and hold injector drivers, capable of driving up to 16 low or high impedance injectors as a standard feature. Multiple staged injector strategies
  • Eight channel Distributorless Ignition (DIS) outputs capable of directly driving "Smart" ignition coils or Holley DIS coils. Will drive 2 wire coils with the addition of PN 554-112 high current coil driver module
  • Plug and Play control of factory GM 24x and 58x LSx engines
  • Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors. More channels can be added via CAN bus
  • Internal data-logging standard with a huge 2GB of memory
  • 4 Stage progressive nitrous control
  • Turbo boost control
  • Integrated water/methanol injection control
  • Self-tuning fuel table strategy greatly simplifies tuning process
  • Individual cylinder fuel and spark control allows you to unlock your engine‚Äôs potential
  • Works with 4, 6, 8 cylinder engines
  • Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
  • Advanced idle, closed loop, and enrichment strategies allow for very stable operation
  • ECU is fully potted and can be mounted in the engine compartment or interior
  • Sealed automotive and marine grade connectors
  • Allows for use of common OEM sensors as well as customer sensor calibration input
  • Ignition Plug and Play with GM 24x and 58x LSx engines, GM HEI, Ford TFI, magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process. Custom settings can be configured to allow many other applications
  • 1-5 Bar MAP sensor capability
  • Two channel knock control sensor Inputs for both one or two wire knock sensors
  • Dedicated fuel and oil pressure inputs
  • Controls both stepper and PWM Idle Air Control (IAC) motors
  • Speed density, Alpha-N, or combination fueling strategies
  • 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
  • 4 Stage nitrous oxide control
  • Fully featured nitrous control eliminates the need for a separate nitrous controller device
  • Can be configured "Wet" or "Dry" with closed loop feedback
  • Progressive control based on time, RPM, or boost, requires part # 554-111
  • Lean or rich safety cutoff
  • Full timing retard/control configurability per stage based on RPM or time
  • Integrated Water/Methanol injection control
  • Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth
Application List
ImageSKU / Part NoApplicationStockPriceAdd to Cart
HOL550-823Select Cylinder Type and Finish: Early to Late Heads and Polished Finish0$3,295.95Call for Price
HOL550-828Select Cylinder Type and Finish: Early to Late Heads and Polished Finish0$3,295.95Call for Price
HOL550-820Select Cylinder Type and Finish: Early to Late Heads and Satin Finish0$2,942.95Call for Price
HOL550-825Select Cylinder Type and Finish: Vortec Heads and Satin Finish0$2,717.95Call for Price
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Poor Man Motorsports LLC

Phone: 720.427.5017
Email:Sales@PoorManMotorsports.com