High temps - engine and OAT
FYI......Just got back from the south coast. Towed a fully loaded camper trailer behind a medium loaded TD5 Disco up the Clyde (Kings Highway) with 2 adults on board.
The Clyde is the mountain range between Batemans Bay and Canberra and is it a steep climb with a few 25KPH hairpins thrown in. Temp outside was 44C on the way up and it's currently 40C here in my Canberra back yard as I type
Drove all the way up the range with an eye on EGT's and apart from a few high 600 spikes while overtaking a few slower cars - and the idiots who cruise at 75KPH until they hit the overtaking lanes and decide to speed up to 115KPH, we managed to keep EGTs under 600C all the way up with coolant staying steady at 85C.
Car is a manual, with 115k's on the clock. Has ECU mapped, EGR and cat converter removed. Has a winch, steel bullbar, steel roof rack and kitchen and fridge unit inside. It's no lightweight so I'm pleased to say that we held no-one up on the range and travelled above general holiday traffic speed.
I'm a firm believer in driving within an EGT and engine torque range which in turn will look after your engine coolant and turbo temps (I have installed an EMS so I can monitor engine and driveline conditions). As you are all aware - Use your gearbox wisely and you will get plenty of air and fuel through your engine which will stabilise temps no matter the load or conditions. Try not to labour or over-rev the engine.
BTW - there was 4 separate car/trailer combinations pulled over up the range. All were diesels and all had bonnets up emitting plumes of steam......wonder if they had pyrometers? ;)