Thread: Ambient & Operating Temps

Originally posted by Noddy
Hi

To what extent does ambient temperatures impact on the operating temps of the key components in our landys?

For example: obviously a hotter day the engine will be running warmer, but how much warmer? And what is the extent of higher ambient temps on the gearboxes, diffs etc over 'normal' ambient temps?

Just interested to know how much of an effect our hotter weather has on the Landys performance over European conditions.

Thanks

Technical point.. the engine itself probably won't run very much hotter at all in Aus because the thermostat should control this fairly tightly and give a constant temp all the time to minimise engine wear.

I don't think the performance of the naturally aspirated engines would be that much different.

However the force fed diesels would have a substantial difference. This is due to the lower air density, and the higher intake temperatures due to the intercoolers not working as effectively.

I know I notice the fender goes a bit better in the cold. The MINI is another thing again. Even the superchager whine is more pronounced on a cold morning because it's compressing more air. hang on

for every degree of inlet air temp will raise the exhaust temp 3 degrees on cold damp mornings you may notice a bit more get up and go because the colder the air the more you get in the combustion chambers.

Originally posted by Captain_Rightfoot

However the force fed diesels would have a substantial difference. This is due to the lower air density, and the higher intake temperatures due to the intercoolers not working as effectively.

Case in point for fitting larger intercoolers in Aus?

Trev.

The ambient temps will only make a difference to the performance of the diesel engined motors. As mentioned, the thermostat should deal with most other things.... That said, the African spec motors do usually have thicker radiator cores and the option for an oil cooler on the gearbox.

As for performance, even in Europe, I notice a difference between driving in winter and summer thanks to the lower temperatures causing an 'intercooler' effect. Sticking a larger intercooler should help you guys but IMO steer clear of increasing the fuel delivery from the pump.

Mark

<div class='quotetop'>QUOTE</div><div class='quotemain'>Case in point for fitting larger intercoolers in Aus? [/b][/quote]

Trev, having logged Tdi i/c outlet temps a number of times, even on an 18*C ambient day, under load @ 80km/h, 4th gear, long steep hill, stock fueling, the outlet temp was, IIRC @ 65*C.

I'm going to throw the thermocouple in the outlet again over the next few days (it's going to get to the low 30's) to see what effects the increase in fueling have done.

I,ll watch this thread with interest as I have been thinking about increasing the intercooler size for better cooling.

Trev.

Sorry if I'm repeating myself. When my mate Mark was consulting to LRA on the TD5 electronic noise quieting for the ADF re-power programme before the Ford takeover, they had a Storm engine in the test cell for long term evaluation and all they did to it was increase the boost (stock fueling) 1psi and doubled the intercooler core thickness. 20% increase in power and torque.

also on one of Clarkies recent threads (port and polish ?) I mentioned that the new 3" exhaust dropped EGT's significantly on my test hill. (stock fueling)
29*C day and they peaked at 580*. Previously it has never been below 603, and usually closer to 609-623*.

edit, just changed an erroneus EGT number from 280 to 580... ops: