Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing

Sizing chart and concentric layup guidelines for TE Raychem DR-25 cross-linked fluoroelastomer heat-shrink tubing, SCL adhesive-lined splices, and System 25 epoxy.

RAG Engineering Capsule — raychem-deray

View RAYCHEM DR-25 · LOOM PROTECTION Spec Matrix Open WIRING Calculator

1. Preserved Specification & Reference Matrix — Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing

Component / Model / Parameter	Technical Specification	Operating Metric / Archive Price	Application & Notes
DR-25-1/8 (3.2 / 1.6 mm)	Expanded ID: 3.2 mm · Recovered ID: 1.6 mm	Recovered Wall: 0.76 mm	1–3× 22 AWG Sensor Sub-Branch (1.8–2.7 mm bundle)
DR-25-3/16 (4.8 / 2.4 mm)	Expanded ID: 4.8 mm · Recovered ID: 2.4 mm	Recovered Wall: 0.84 mm	4–7× 22 AWG Injector/Coil Branch (2.8–4.0 mm bundle)
DR-25-1/4 (6.4 / 3.2 mm)	Expanded ID: 6.4 mm · Recovered ID: 3.2 mm	Recovered Wall: 0.89 mm	8–14× 22 AWG Engine Sub-Trunk (3.8–5.4 mm bundle)
DR-25-3/8 (9.5 / 4.8 mm)	Expanded ID: 9.5 mm · Recovered ID: 4.8 mm	Recovered Wall: 1.02 mm	15–28 Conductor Concentric Loom (5.5–8.0 mm bundle)
DR-25-1/2 (12.7 / 6.4 mm)	Expanded ID: 12.7 mm · Recovered ID: 6.4 mm	Recovered Wall: 1.22 mm	Main Bulkhead Trunk 30–50 Wires (7.5–10.8 mm bundle)
DR-25-3/4 (19.1 / 9.5 mm)	Expanded ID: 19.1 mm · Recovered ID: 9.5 mm	Recovered Wall: 1.45 mm	Autosport Main ECU Trunk 55+ Wires (11.0–16.0 mm)

2. Trackside Engineering & Calibration Guide: TE Raychem DR-25 Fluoroelastomer Heat-Shrink, SCL Splices & System 25 Epoxy

System Architecture (TE Raychem DR-25 Fluoroelastomer Heat-Shrink, SCL Splices & System 25 Epoxy): Paired with Raychem 202K121-25 / 202K152-25 lipped boots and 222K152 right-angle boots sealed with two-part RT-1114 / System 25 adhesive. Within the historical hvelectronics.co.nz motorsport catalog, the Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing directory (/collections/raychem-deray) serves as the primary calibration and hardware selection reference for New Zealand circuit, rally, and drift engine builds.

Component-Level Technical Breakdown: For DR-25-1/8 (3.2 / 1.6 mm), the nominal specification is Expanded ID: 3.2 mm · Recovered ID: 1.6 mm (Recovered Wall: 0.76 mm), engineered specifically for 1–3× 22 AWG Sensor Sub-Branch (1.8–2.7 mm bundle). For DR-25-3/16 (4.8 / 2.4 mm), the nominal specification is Expanded ID: 4.8 mm · Recovered ID: 2.4 mm (Recovered Wall: 0.84 mm), engineered specifically for 4–7× 22 AWG Injector/Coil Branch (2.8–4.0 mm bundle). For DR-25-1/4 (6.4 / 3.2 mm), the nominal specification is Expanded ID: 6.4 mm · Recovered ID: 3.2 mm (Recovered Wall: 0.89 mm), engineered specifically for 8–14× 22 AWG Engine Sub-Trunk (3.8–5.4 mm bundle). For DR-25-3/8 (9.5 / 4.8 mm), the nominal specification is Expanded ID: 9.5 mm · Recovered ID: 4.8 mm (Recovered Wall: 1.02 mm), engineered specifically for 15–28 Conductor Concentric Loom (5.5–8.0 mm bundle). For DR-25-1/2 (12.7 / 6.4 mm), the nominal specification is Expanded ID: 12.7 mm · Recovered ID: 6.4 mm (Recovered Wall: 1.22 mm), engineered specifically for Main Bulkhead Trunk 30–50 Wires (7.5–10.8 mm bundle). For DR-25-3/4 (19.1 / 9.5 mm), the nominal specification is Expanded ID: 19.1 mm · Recovered ID: 9.5 mm (Recovered Wall: 1.45 mm), engineered specifically for Autosport Main ECU Trunk 55+ Wires (11.0–16.0 mm).

Harness & Loom Termination Standard: Recover DR-25 at 175°C using a calibrated Steinel heat gun with reflector nozzle, starting from the connector boot and working toward the transition breakout.

ECU Calibration & Scaling Note (RAYCHEM DR-25 · LOOM PROTECTION): Cross-linked DR-25 withstands continuous immersion in E85 ethanol, methanol, synthetic ester gear oils, and DOT4 brake fluid from -75°C to +150°C.

3. Scrutineering & Loom Termination Checklist (raychem-deray)

Mandatory field checks when installing or calibrating TE Raychem DR-25 Fluoroelastomer Heat-Shrink, SCL Splices & System 25 Epoxy from the Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing archive on New Zealand competition vehicles:

DR-25-1/8 (3.2 / 1.6 mm) Verification: Confirm baseline operating parameter (Expanded ID: 3.2 mm · Recovered ID: 1.6 mm / Recovered Wall: 0.76 mm) prior to dyno cell start-up — 1–3× 22 AWG Sensor Sub-Branch (1.8–2.7 mm bundle).
DR-25-3/16 (4.8 / 2.4 mm) Inspection: Validate installation against Expanded ID: 4.8 mm · Recovered ID: 2.4 mm (Recovered Wall: 0.84 mm) — 4–7× 22 AWG Injector/Coil Branch (2.8–4.0 mm bundle).
DR-25-1/4 (6.4 / 3.2 mm) & DR-25-3/8 (9.5 / 4.8 mm) Audit: Cross-check Expanded ID: 6.4 mm · Recovered ID: 3.2 mm and Expanded ID: 9.5 mm · Recovered ID: 4.8 mm tolerances under full thermal and vibration load (Recover DR-25 at 175°C using a calibrated Steinel heat gun with reflector nozzle, starting from the connector boot and working toward the transition breakout.).

INTERACTIVE WORKBENCH PRESET (WIRING)

Compute custom transfer slopes, injector flow scaling, CAN word bit-timing, or wire voltage drop for TE Raychem DR-25 Fluoroelastomer Heat-Shrink, SCL Splices & System 25 Epoxy:

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4. Technical FAQ — Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing

What are the primary calibration specifications in the Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing archive?

TE Connectivity Raychem DR-25 is a cross-linked diesel- and fuel-resistant fluoroelastomer heat-shrinkable tubing (-75°C to +150°C continuous, 2:1 shrink ratio). For optimal flexibility and strain relief, select a DR-25 size whose expanded ID is at least 20% larger than the bundle OD and whose recovered ID is at least 15% smaller. Key reference points include DR-25-1/8 (3.2 / 1.6 mm) (Expanded ID: 3.2 mm · Recovered ID: 1.6 mm) and DR-25-3/16 (4.8 / 2.4 mm) (Expanded ID: 4.8 mm · Recovered ID: 2.4 mm).

How should TE Raychem DR-25 Fluoroelastomer Heat-Shrink, SCL Splices & System 25 Epoxy be configured in Link G4X, Emtron, or Haltech ECUs?

Cross-linked DR-25 withstands continuous immersion in E85 ethanol, methanol, synthetic ester gear oils, and DOT4 brake fluid from -75°C to +150°C. Always follow the harness rule: Recover DR-25 at 175°C using a calibrated Steinel heat gun with reflector nozzle, starting from the connector boot and working toward the transition breakout.

Where can New Zealand teams purchase replacement hardware for Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing?

While hvelectronics.co.nz preserves the 2018–2022 specification archive and interactive calculators for Raychem DR-25 & DERAY Motorsport Heat-Shrink — 2:1 Recovery & Loom Sizing, active NZ retail stock for the HV Sensors range is supplied by DTech Motorsport in Tauranga.

5. Related Hardware Datasheets for RAYCHEM DR-25 · LOOM PROTECTION

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 ↗

HV-IAT-NTC-01 · Temperature Sensors $81.00 NZD $90.00 NZD

HV Air Temperature Sensor — Open-Element Fast NTC

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.

Range: -40°C to +135°C Continuous Charge-Air / Inlet Temperature

Signal: Negative Temperature Coefficient (NTC) Thermistor · 2,500 Ω nominal at 20°C (GM/Delco curve)

Port: 3/8"-18 NPT Brass Hex Body with Open Cage Tip

View Calibration & Pinout DTech Stock ↗