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The upper block in its prototype form is some pipe insulation wedged into the gaps.
Unfortunately the car got a little too warm today so I will have to revise the design.
Whilst on the motor way / main roads (generally above 60 km/h) it was fine, but at slower speeds it got very warm very fast.
My idea with quite a few slots was to spread the air over the radiator so that there wouldn't be any hot spots.
I have now found a sheet of black corrplast so I was planning to re-make the upper grill block, in the meantime the lower block will have to be re-thought.
I'm thinking perhaps two or three slots that go horizontally from one side to the other.
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