EFI SYSTEMS WORKBENCH

Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time

Complete EFI calculation suite covering stoichiometric air-fuel ratios, Brake Specific Fuel Consumption (BSFC), injector dead-time (latency), and differential rail pressure.

RAG Engineering Capsule — efi

View EFI SYSTEMS WORKBENCH Spec Matrix Open INJECTOR Calculator

1. Preserved Specification & Reference Matrix — Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time

Component / Model / Parameter	Technical Specification	Operating Metric / Archive Price	Application & Notes
98 RON Pump Petrol	Stoich 14.70:1 · Density 0.745 kg/L	NA BSFC: 0.46–0.50 lb/(hp·h)	Turbo BSFC: 0.55–0.62 lb/(hp·h)
E85 Motorsport Ethanol	Stoich 9.76:1 · Density 0.785 kg/L	NA BSFC: 0.63–0.68 lb/(hp·h)	Turbo BSFC: 0.75–0.85 lb/(hp·h)
M100 Racing Methanol	Stoich 6.47:1 · Density 0.792 kg/L	NA BSFC: 0.95–1.05 lb/(hp·h)	Turbo BSFC: 1.15–1.30 lb/(hp·h)

2. Trackside Engineering & Calibration Guide: Stoichiometric Fuel Mass Calculation, Injector Dead-Time & Differential Rail Pressure

System Architecture (Stoichiometric Fuel Mass Calculation, Injector Dead-Time & Differential Rail Pressure): Supports seamless multi-fuel flex tuning between New Zealand pump 98 RON petrol (14.7:1 stoich) and E85 motorsport ethanol (9.76:1 stoich). Within the historical hvelectronics.co.nz motorsport catalog, the Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time directory (/collections/efi) serves as the primary calibration and hardware selection reference for New Zealand circuit, rally, and drift engine builds.

Component-Level Technical Breakdown: For 98 RON Pump Petrol, the nominal specification is Stoich 14.70:1 · Density 0.745 kg/L (NA BSFC: 0.46–0.50 lb/(hp·h)), engineered specifically for Turbo BSFC: 0.55–0.62 lb/(hp·h). For E85 Motorsport Ethanol, the nominal specification is Stoich 9.76:1 · Density 0.785 kg/L (NA BSFC: 0.63–0.68 lb/(hp·h)), engineered specifically for Turbo BSFC: 0.75–0.85 lb/(hp·h). For M100 Racing Methanol, the nominal specification is Stoich 6.47:1 · Density 0.792 kg/L (NA BSFC: 0.95–1.05 lb/(hp·h)), engineered specifically for Turbo BSFC: 1.15–1.30 lb/(hp·h).

Harness & Loom Termination Standard: Supply all fuel injectors and ignition coils from high-current relays wired with 12–16 AWG Tefzel to keep supply voltage drop below 0.15V at full duty cycle.

ECU Calibration & Scaling Note (EFI SYSTEMS WORKBENCH): Accurate injector dead-time (voltage vs differential fuel pressure 3D lookup) is essential so lambda remains rock-steady during alternator voltage swings or boost-referenced rail pressure changes.

3. Scrutineering & Loom Termination Checklist (efi)

Mandatory field checks when installing or calibrating Stoichiometric Fuel Mass Calculation, Injector Dead-Time & Differential Rail Pressure from the Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time archive on New Zealand competition vehicles:

98 RON Pump Petrol Verification: Confirm baseline operating parameter (Stoich 14.70:1 · Density 0.745 kg/L / NA BSFC: 0.46–0.50 lb/(hp·h)) prior to dyno cell start-up — Turbo BSFC: 0.55–0.62 lb/(hp·h).
E85 Motorsport Ethanol Inspection: Validate installation against Stoich 9.76:1 · Density 0.785 kg/L (NA BSFC: 0.63–0.68 lb/(hp·h)) — Turbo BSFC: 0.75–0.85 lb/(hp·h).
M100 Racing Methanol & E85 Motorsport Ethanol Audit: Cross-check Stoich 6.47:1 · Density 0.792 kg/L and Stoich 9.76:1 · Density 0.785 kg/L tolerances under full thermal and vibration load (Supply all fuel injectors and ignition coils from high-current relays wired with 12–16 AWG Tefzel to keep supply voltage drop below 0.15V at full duty cycle.).

INTERACTIVE WORKBENCH PRESET (INJECTOR)

Compute custom transfer slopes, injector flow scaling, CAN word bit-timing, or wire voltage drop for Stoichiometric Fuel Mass Calculation, Injector Dead-Time & Differential Rail Pressure:

Launch INJECTOR Workbench Mode →

4. Technical FAQ — Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time

What are the primary calibration specifications in the Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time archive?

Electronic Fuel Injection pulsewidth is governed by PW = (m_fuel / Flow_dynamic) + DeadTime(V_batt, ΔP). Switching from 98 RON petrol (stoich 14.7:1) to E85 ethanol (stoich 9.76:1) increases required volumetric fuel flow by ~38–42% under wide-open throttle boost. Key reference points include 98 RON Pump Petrol (Stoich 14.70:1 · Density 0.745 kg/L) and E85 Motorsport Ethanol (Stoich 9.76:1 · Density 0.785 kg/L).

How should Stoichiometric Fuel Mass Calculation, Injector Dead-Time & Differential Rail Pressure be configured in Link G4X, Emtron, or Haltech ECUs?

Accurate injector dead-time (voltage vs differential fuel pressure 3D lookup) is essential so lambda remains rock-steady during alternator voltage swings or boost-referenced rail pressure changes. Always follow the harness rule: Supply all fuel injectors and ignition coils from high-current relays wired with 12–16 AWG Tefzel to keep supply voltage drop below 0.15V at full duty cycle.

Where can New Zealand teams purchase replacement hardware for Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time?

While hvelectronics.co.nz preserves the 2018–2022 specification archive and interactive calculators for Electronic Fuel Injection (EFI) Engineering — Stoichiometry, BSFC & Dead-Time, active NZ retail stock for the HV Sensors range is supplied by DTech Motorsport in Tauranga.

5. Related Hardware Datasheets for EFI SYSTEMS WORKBENCH

HV-MAP-400-NPT · Pressure Sensors $160.20 NZD $178.00 NZD

HV MAP Sensor 4 Bar Absolute — 1/8" NPT Stainless

The HV Electronics 4-Bar MAP Sensor (HV-MAP-400-NPT, archived at $160.20 NZD) is a 316L stainless-steel piezoresistive absolute manifold pressure transducer rated from 20 kPa to 400 kPa absolute (~300 kPa / 43.5 psi gauge boost at 100 kPa barometric pressure). It outputs a ratiometric 0.50 V–4.50 V signal for Emtron, Link, and Haltech ECUs.

Range: 20 to 400 kPa Absolute (0.20 to 4.00 Bar Abs / up to 43.5 psi boost at sea level)

Signal: 0.50 V to 4.50 V Ratiometric Linear Analog (5.00 V ± 0.05 V Regulated ECU Supply)

Port: 1/8"-27 NPT Male Machined 316L Stainless Steel

View Calibration & Pinout DTech Stock ↗

BOSCH-0580254044-200 · Fuel System Components $200.60 NZD $236.00 NZD

Bosch 200 / 044 External High-Pressure Motorsport Fuel Pump

The Bosch 200 External Motorsport Fuel Pump (0 580 254 044 / 200 series, archived on HV Electronics at $200.60 NZD) is an inline roller-cell pump delivering 275 L/h at 3.0 Bar and 235 L/h at 5.0 Bar (13.5V). It supports ~620 wheel HP on 98 RON petrol or ~430 wheel HP on E85 at 4.5 Bar total rail pressure.

Range: 275 L/h @ 3.0 Bar · 235 L/h @ 5.0 Bar · 195 L/h @ 6.0 Bar (13.5V DC)

Signal: Roller-Cell Positive Displacement Inline Pump (Internal 11.5 Bar Relief Valve)

Port: Inlet: M18×1.5 Female · Outlet: M12×1.5 Banjo / Check-Valve Stud

View Calibration & Pinout DTech Stock ↗