[4ePajero]

This thread is more for 'interest' than anything else.

I fitted the MGL Avionics TC1 EGT gauge to my 3.2 Di-D turbo diesel Pajero.
The TC1 gauge is a 4-channel gauge, which means it can report on 4 different temperature measurements.

I decided to install probes as follows:

• EGT (exhaust manifold)
• coolant temperature
• temperature before the inter cooler
• temperature after the inter cooler

It is interesting to note the efficiency of the inter cooler.

These are typical readings (taken yesterday):

Outside temp = 24 °C

• EGT (exhaust manifold) 150-450 °C
• coolant temperature ±85 °C
• temperature before the inter cooler ±40 °C
• temperature after the inter cooler ±15 °C

I was amased to see that it reduces the intake air by ±25 °C!
I will watch it and see how it performs for cold days, rainy days, hard work.

[Gerrit Loubser]

Gerhard, how did the intercooler manage to cool the charge air to lower than ambient temperature? Are you sure there is not something fishy with the measurement setup?

[4ePikanini]

The actual temps might differ but I think the key here is the drop in temperature that makes the difference.

[4ePajero]

Gerhard, how did the intercooler manage to cool the charge air to lower than ambient temperature? Are you sure there is not something fishy with the measurement setup?

1. I agree that the absolute values could be incorrect, due to the fact that I 'manufactured' my own K-couplings.
When the vehicle is cold (eg after standing overnight), all sensors give ± the same temps.
The relative temperatures (and thus the temperature reduction) is more important, and that should be approximately correct.

2. The 'ambient' temperature is questionable as well, since it was measured by the Pajero's 'high-tech' sensor , situated in the bumper, which I don't necessarily believe.

Extended use will give me enough info to 'calibrate' the system, so for the moment I'm fascinated by the temperature reduction (rather than absolute values).

[Gerrit Loubser]

the key here is the drop in temperature that makes the difference.

Agreed. I did not realise that the ambient temperature was from the Paj's sensor .

[HBannink]

Scuse my ignorance and (slightly) off topic but what does these oil burners boost. Just curious to compare the pressure to increase in temp?

[4ePajero]

Scuse my ignorance and (slightly) off topic but what does these oil burners boost. Just curious to compare the pressure to increase in temp?

The turbo on the 4m41 Di-D can boost up to 1.9 bar, although the way I drive, it will never get there.