Hi, well, we did 11,500km and averaged 18.2L/100km towing a massive van.
A couple of things I learnt:
- dead stock 1HD-FTE in 100 series is up to 710C pre turbo - higher than I had thought and checked last week on another 100.
- I did the whole trip not going over 670C at any point, but I will tune a bit higher.
- my intercooler dropped that by 60 degree's
- my air intake temps never went above 60deg C - even at 28psi
- AFR's towing at 100km/h on flat were 27-30:1 typically at 12psi and EGT's 460C (pre turbo)
- My A750F gearbox (with valve body mod) needs more tweeks to handle 30psi long term (but it just so happens that this can be achieved electronically)
- going 1:1 (4th) up steep hills towing 4 tonne at 80+km/h is fun ....and a bit stressful. At one point loaded right up, 26psi at 1800rpm, grunting up this mountain (hill elsewhere in the world) and almighty bang occurred when the factory rubber boost hose exploded (it didnt just crack). Lucky I mapped fuel to 25psi and I didnt melt the engine with a sudden boost drop. I did a McGyver with braided fishing line and Sikaflex.....
Happy boosting, G
A couple of things I learnt:
- dead stock 1HD-FTE in 100 series is up to 710C pre turbo - higher than I had thought and checked last week on another 100.
- I did the whole trip not going over 670C at any point, but I will tune a bit higher.
- my intercooler dropped that by 60 degree's
- my air intake temps never went above 60deg C - even at 28psi
- AFR's towing at 100km/h on flat were 27-30:1 typically at 12psi and EGT's 460C (pre turbo)
- My A750F gearbox (with valve body mod) needs more tweeks to handle 30psi long term (but it just so happens that this can be achieved electronically)
- going 1:1 (4th) up steep hills towing 4 tonne at 80+km/h is fun ....and a bit stressful. At one point loaded right up, 26psi at 1800rpm, grunting up this mountain (hill elsewhere in the world) and almighty bang occurred when the factory rubber boost hose exploded (it didnt just crack). Lucky I mapped fuel to 25psi and I didnt melt the engine with a sudden boost drop. I did a McGyver with braided fishing line and Sikaflex.....
Happy boosting, G
not questioning that it can be done but it will be interesting to see the temps and if it is mountainous then the resulting strain on the 373 tranny. i "think" it is an auto.