The way that your four wheel drive is tuned makes a huge difference to the economy, power and torque. Many older vehicles are limited in what can be done, but there are always improvements to be made. The newer diesels take very well to upgraded chips, and will often pay for themselves in fuel savings alone.
80 Series Land Cruiser 1HDT tuning
My 80 Series Land Cruiser runs the 4.2 turbo diesel engine (1HDT) and is well known for great economy along with plenty of power and torque. However, they also have a reputation for being tuned very conservatively before the turbo kicks in.
The average economy that I have been getting is around 15-18L/100km. However, on a trip down south to Yeagarup, it used 18L/100km (and a whopping 31L/100km on the beach and dunes). A few people commented on the vehicle smoking at low RPM, and it lacked power before the turbo came on, so I decided it was worth getting looked at.
UPDATE: Gturbo tuning
Last year my diesel pump started dripping badly, and after many hours of research I decided to take it to Gturbo to be fixed. Whilst there, I had the turbo replaced with one of their aftermarket units, and the results have been nothing short of astounding. I'd highly recommend Gturbo; have a read of the post I wrote about it at Gturbo; diesel power upgrade.
United Fuel Injection
United Fuel Injection has been in the diesel and turbo industry for 40 years. They work on everything from stock standard diesels through to competition four wheel drives and big trucks. They have a quality bosch dynotune machine and the skills to tune your vehicle for your requirements.
80 Series 1HDT tuning results
After checking various forums, United Fuel Injection had the best reputation, and I gave Matt a call. I booked the Land Cruiser in, and dropped it off during a lunch break. The intention was to reduce the smoke, and see if it could be tuned to have more power before the turbo came on. A few hours later, and I came back to a dynotuned turbo diesel, for $220. The power went from 121kW to 126kW and the torque from 348Nm to 374Nm, both at lower RPM. Through the whole rev range the vehicle has more power, and it was a real pleasure to drive.
From factory, these engines put out 115kw. Mine has a 3” exhaust and safari intercooler. However, it has been rebuilt around 70,000km ago.
My review of United Fuel Injection
I was very pleased with the work that Matt from United Fuel Injection did. It was quick, professional, and very beneficial to my vehicle. However, since visiting Gturbo and having them work on my vehicle, I know where I will be going next.
Diesel Tuning in Perth
United Fuel Injection is very popular. There are a few other companies, including Gturbo, Turbo Tech, Diesel Fuel Injection, Total Fuel Injection, and A1 Diesel and Injection. Look up their reviews online, and pick the one that is going to look after your vehicle the best!