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ARCHIVED DATASHEET · SKU: HV-IAT-NTC-01 · Archived HV Spec · Currently Stocked at DTech Motorsport

HV Air Temperature Sensor — Open-Element Fast NTC — Calibration Table, Pinout & Archive Spec

Name: HV Air Temperature Sensor — Open-Element Fast NTC
Brand: HV Sensors / HV Electronics NZ Archive
SKU: HV-IAT-NTC-01
Price: 81.00 NZD
Availability: OutOfStock

Archived Sale: $81.00 NZD Reg: $90.00 NZD Save $9.00 NZD (2022 Archive)

RAG Datasheet Summary — HV-IAT-NTC-01

The HV Air Temperature Sensor (HV-IAT-NTC-01, archived at $81.00 NZD and actively stocked by DTech Motorsport) is an open-cage NTC thermistor charge-air sensor with a 3/8"-18 NPT thread. It follows the standard motorsport 2.5 kΩ @ 20°C resistance curve and connects to an ECU Analog Temp channel with a 1,000 Ω internal 5V pull-up.

Transfer Equation / Scaling: 1/T(K) = A + B·ln(R) + C·[ln(R)]³ (A=1.286e-3, B=2.359e-4, C=9.420e-8)

Jump to ECU Calibration Table Check Active NZ Stock at DTech Motorsport ↗

Hardware Engineering Specifications

HV-IAT-NTC-01

Measurement Range	-40°C to +135°C Continuous Charge-Air / Inlet Temperature
Output Signal / Bus	Negative Temperature Coefficient (NTC) Thermistor · 2,500 Ω nominal at 20°C (GM/Delco curve)
Mechanical Thread / Port	3/8"-18 NPT Brass Hex Body with Open Cage Tip
Electrical Connector	2-Pin Delphi Metri-Pack 150.2 Pull-to-Seat (Non-polarized NTC)
Step Response / Rate	< 4.2 s thermal time constant in 10 m/s air stream
Operating Thermal Envelope	-40°C to +135°C
2022 Wayback Archive Price	$81.00 NZD (Regular $90.00 NZD)

ECU Calibration & Scaling Reference Table (HV Air Temp Sensor)

Direct lookup points for Emtron Emma, Link PCLink G4X/G5, Haltech NSP, and MoTeC M1 Tune.

Input / Signal Point	Primary Engineering Output	Secondary Unit	Application / Regime Note
-20 °C	28,680 Ω	4.83 V	Cold Ambient Start
0 °C	9,420 Ω	4.52 V	Freezing Baseline
20 °C	3,520 Ω	3.89 V	Standard Dyno Room (ISA +5°C)
40 °C	1,459 Ω	2.97 V	Normal Intercooled Cruising
60 °C	667 Ω	2.00 V	Sustained Track WOT Charge Air
80 °C	332 Ω	1.25 V	High Boost Heat-Soak Threshold
100 °C	177 Ω	0.75 V	ECU Ignition Retard / Enrichment Warning
120 °C	99 Ω	0.45 V	Critical Compressor Outlet Limit

Motorsport Harness Pinout & Wiring Assignment

Terminate using 20–22 AWG MIL-W-22759 Tefzel wire and sleeve with Raychem DR-25.

Pin / Cavity	Function	Typical Wire Colour	ECU Termination Notes
Pin A	ECU Analog Temp Input (AT / AN Temp)	Yellow	Requires 1.0 kΩ internal pull-up to +5.0V reference enabled in ECU software.
Pin B	ECU Sensor 0V Ground (AN GND)	Black / White	Shared clean analog return to ECU sensor ground pin.

Interactive Calibration & Sizing Workbench

Injector Sizing, BSFC & Bosch 200 Pump Head Calculator

Compute required static injector flow (cc/min) and high-pressure fuel pump capacity across Petrol 98, E85 ethanol, and Methanol using Bernoulli square-root rail pressure scaling.

Target Flywheel Power (HP)

Engine Cylinders

Fuel Stoichiometry & BSFC Profile

Max Safe Injector Duty Cycle (%)

Base Differential Rail Pressure (Bar)

Peak Manifold Boost Pressure (Bar Gauge)

Q_new = Q_rated × √(P_new / P_rated) | P_pump_total = P_base + P_boost

Req. Flow @ Rail Pressure 1050 cc/min

Nominal 3.0 Bar Injector 972 cc/min @ 3.0 Bar

Total Fuel Pump Demand 213.4 L/h

Reference Hardware: Bosch 200 External Fuel Pump (0 580 254 044, $200.60 NZD Archive) delivers 275 L/h @ 3.0 Bar and 235 L/h @ 5.0 Bar total head.

Two-Point 0–5V Ratiometric MAP Pressure Calibration Generator

Generate a 9-point linear voltage-to-kPa calibration table for Emtron KV/SL, Link G4X, and Haltech NSP ECUs. Default preset matches the HV 4-Bar MAP Sensor (HV-MAP-400-NPT).

View Full JSON Spec

Linear Transfer Equation P(kPa) = 95.00 × V - 27.50

Expected Sea-Level Key-On 1.34 V @ 100 kPa Baro

ECU Input Configuration 5.0V Ratiometric · Pull-Up OFF

AN Volt (V)	Absolute (kPa)	Absolute (Bar)	Relative Gauge (psiG)

Lambda (λ) ↔ AFR Multi-Fuel Converter & 1 Mbps CAN Frame Decoder

Convert wideband equivalence ratio (λ) across Petrol, E85, and Methanol, and decode raw 8-byte Big-Endian hexadecimal CAN frames from the HVLC2 Dual Lambda ($555 NZD) and HV EGT CAN ($483 NZD) modules.

AFR_fuel = λ × AFR_stoich | CAN Word = (Byte_MSB << 8) | Byte_LSB

Petrol (14.7) & Methanol (6.47) 12.05 : 1 (Petrol)

Pump / Race E85 (Stoich 9.76) 8.00 : 1 (E85)

Decoded 16-Bit CAN Channels Ch1 λ=0.820 | Ch2 λ=0.850 | EGT=900°C

Lambda (λ)	Petrol 98 (14.70:1)	E85 Ethanol (9.76:1)	Methanol (6.47:1)	Operating Regime
0.75 λ	11.03 : 1	7.32 : 1	4.85 : 1	High-Boost Rich Thermal Protection (>2.0 Bar)
0.82 λ	12.05 : 1	8.00 : 1	5.31 : 1	Peak Torque WOT Turbocharged Target
0.88 λ	12.94 : 1	8.59 : 1	5.69 : 1	Naturally Aspirated WOT Peak Power
1.00 λ	14.70 : 1	9.76 : 1	6.47 : 1	Closed-Loop Stoichiometric Cruise

Tefzel MIL-W-22759 Voltage Drop & Raychem DR-25 Bundle Calculator

Calculate round-trip DC voltage drop across tinned-copper MIL-W-22759/16 & /32 ETFE motorsport wire and select the matching 2:1 Raychem DR-25 fluoroelastomer heat-shrink sleeve.

Round-Trip Voltage Drop (ΔV) 1.165 V (8.44% @ 13.8V)

Recommended Raychem DR-25 Size DR-25-3/8 (9.5 / 4.8 mm)

Insulation Rating 150°C ETFE · 600V RMS

AWG Size	Stranding	Resistance @ 20°C	Nominal OD	Bundle Max Current
22 AWG	19/34 Tinned Cu	51.5 mΩ/m	1.32 mm	5.0 A (Sensors / Triggers)
20 AWG	19/32 Tinned Cu	32.0 mΩ/m	1.52 mm	7.5 A (Injectors / Solenoids)
18 AWG	19/30 Tinned Cu	20.3 mΩ/m	1.78 mm	10.0 A (Ignition Coils / LSU 4.9)
12 AWG	37/28 Tinned Cu	6.3 mΩ/m	2.92 mm	25.0 A (Bosch 200 Fuel Pump)

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