Following is a selection of vehicles fitted with the Diesel/Gas Australia system. Included are vital statistics for each vehicle showing economy figures where possible and power/toque figures for those vehicles dyno tuned.
All power figures are given as horsepower at the rear wheels (RWHP). The same applies for torque (or tractive effort). These figures are more realistic than flywheel figures; they take into account gearing and tyre size, giving you a better idea where the power and torque is produced. The figures and dyno readouts shown are accurate only for the particular vehicle tested; other examples of the same model can give different results. However, these figures are indicative of the results you can expect.
All dyno runs were done in “Shootout” mode – all figures are compensated for humidity and ambient temperature, and final figures cannot be adjusted. This means the readout can be compared to other runs on different machines done in the same mode. On the charts below, the solid line is the power curve, and the dotted line is the torque curve.
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1998 Land Rover Defender
Station Wagon
300Tdi – 2.5l Intercooled turbo diesel
5 Speed Manual
119,000km when fitted
Average fuel consumption 10.7 l/100km |
Standard Power: (red line)
66hp @ 3350rpm
620lbft @ 2300rpm
DieselGas Power: (green line)
88.9hp @ 3600rpm (+34%)
930lbft @ 2450rpm (+50%) | |
Range has increased from 700km to over 1000km at these settings. Also note how the power is increased over the whole rev range.
This is the vehicle used in the economy example.
This example shows typical results for a small capacity, higher-revving intercooled turbo diesel.
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2002 Nissan Patrol GU Coil Cab
TD42T – 4.2l 6Cyl turbo diesel
5 Speed Manual
80,000km when fitted
Average fuel consumption 15l/100km
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Standard Power: (red line)
96.6hp @ 3200rpm
840lbft @ 2600rpm
DieselGas Power (green line):
141.5hp @ 2750rpm (+46%)
1295lbft @ 2040rpm (+54%) | |
Power has increased 46% and torque 55%. This was achieved with no black smoke. Power is also created much earlier; peaking 450rpm sooner (also note how much quicker the power climbs on the graph). Torque peaks 600rpm sooner. This example shows typical results for a large capacity, slower revving turbo diesel.
A larger capacity intercooler has been fitted to this vehicle, with boost pressure and injection pump both adjusted to optimise performance. The nett effect was more power from lower in the rev range, with the power climbing quicker – essentially no turbo lag.
With the diesel/gas system fitted, power and torque increased dramatically, further enhancing the intercooler upgrade.
This example demonstrates how other performance modifications can be further enhanced with this system. The nett result for this vehicle was 48% more power over standard.
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2002 Tyota Land Cruiser
100 Series Wagon
1HZ – 4.2l 6cyl, naturally aspirated
5 Speed Manual
99,000km when fitted
Average fuel consumption 12.6l/100km
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Standard Power: (red line)
76.6hp @ 3900rpm
660lbft @ 2400rpm
DieselGas Power: (blue line):
91.1hp @ 3950rpm (+19%)
800lbft @ 2350rpm (+21%) | |
This example shows typical results for a large capacity, slower revving, naturally aspirated diesel.
LPG switch/gauge unit fitted in the dash.
Power increase aside, the other improvement to this vehicle is its willingness to rev with the LPG, making it a much easier vehicle to drive.
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