Quote:
Originally Posted by grober
Does this not mean your under bonnet air temperature will rise---
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I'll stick a thermometer under there, but from what I can feel the short answer is no, it doesn't seem to make things hotter. I intend to lag the exhaust manifold at some stage, which will cool under bonnet temps.
The ECU compartment is sealed behind the bulkhead so shouldn't really be affected, and this is a diesel so wastes much less heat than a petrol engine.
I also worked on the premise that the grille is large enough for an AMG55 at full chat in the Sahara so much less intake is actually required.
Citroen fitted longer bonnets to diesels than petrols on the BX to assist with aerodynamics as no grille was required for cooling.
This car has an undertray with optimised air exits anyway, though I ought to take some air pressure readings.
Normally there is so much air pressure under the bonnet that cooling can be affected anyway once it builds up.
Warmer under bonnet temps may help some drivers, especially if running on veg oil, as normally the filter is always cold.
Maybe I'll get onto some 'wool tuft testing' as well..