Ray uses his laptop to remap the Dtronic performance chip to match our modifications. The system features a ceramic coated dump pipe that keeps super-heated exhaust gasses out of the engine bay, leading to better combustion and lowering EGTs.
With a performance chip (specific to the ZD30 engine) fitted to add more fuel, a TaipanXP exhaust with high flow catalytic converter helps the engine breathe without excessive noise at highway speeds. Scarily, heavily laden and unmodified Patrols can punch through this threshold without even knowing it. EGT readings are critical with 550-600☌ the maximum safe operating level for our motor. To monitor the vital signs, Ray added exhaust gas temperature (EGT) and boost gauges.
To fix this we fitted a manual boost control system, which sets the boost to a maximum level - providing a more linear boost curve, improving performance and managing exhaust and cylinder temperatures. The ZD30 engine has a reputation for boost spikes, particularly after bolt on performance modifications such as a free breathing exhaust and/or a performance chip. To kick proceedings off, Ray performed an initial dyno run, giving a base position and enabling comparison with manufacturer specifications. We hoped to extract some more power for towing, enable monitoring of vital signs and address some known failure points.
With 38 years experience delivering vehicle performance gains he was just the man for the job. So I contacted Ray Miller from Turbo Engineering in Melbourne. Having an electronic injection system means the only way to increase performance is to fit an aftermarket chip. More importantly are the aftermarket goodies available for her. NISSAN'S GU PATROL, with the ZD30 direct injection 3.0L turbo diesel engine, has a lot to offer as a long distance tourer - generous family proportions, rugged underpinnings, good performance and fuel economy.
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