Aluminum Dynamic Timing Advance Spacer for Land Rover Defender 200 TDI 300 TDI
Bosch VE Timing Advance Modification
This aluminium spacer adjusts the internal geometry of Bosch VE mechanical injection pumps to extend dynamic timing advance range. By shifting the injection plate position slightly forward, fuel begins firing a fraction earlier as RPM climbs. The modification improves combustion completion under load while leaving your factory static timing untouched, which keeps idle stability and low-rpm torque intact.
Practical Benefits & Fitment Advice
- Preserve original static timing settings to maintain reliable cold starts and stop-and-go drivability.
- Re-check injection advance with a calibrated gauge after the first 50 km of operation, allowing pump plates and seals to settle.
- Couple this upgrade with an unrestrictive intake and exhaust layout to fully translate the improved spark timing into measurable horsepower gains.
Technical Specifications
Blade Material: CNC machined aluminium
Geometric Accuracy: 0.01 mm tolerance
Gasket Specification: Heavy-duty FKM O-ring rated for severe thermal cycling and petroleum diesel exposure
Direct Applications: Land Rover Defender, Discovery & Range Rover (200 TDI & 300 TDI); Volvo 740 & 760 (D24T 2.4L Turbo Diesel); select Volkswagen & Audi diesel engines fitted with the Bosch VE rotary pump.
Package Includes
- One aluminium dynamic timing booster disc
- One FKM high-temp sealing ring
- Required mounting fasteners
Installation Reminders
Mechanical injection systems rely on precise shim calibration. Install only if you understand VE pump disassembly, and always bleed air from the lift pump prior to cranking. Avoid exceeding recommended torque values to prevent casing distortion.
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