Thread: Under Bonnet/Hood Heat Insulation
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Old 08-11-2023, 04:51 PM
gcarm gcarm is offline
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Join Date: Feb 2015
Location: Sydney, NSW
Cobra Make, Engine: G-Force with LS1
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I fitted a 180 deg F thermostat (Mr Gasket MRG-6368) and a high flow water pump (+30% flow). They have helped - maybe reduced the temperature by 5 deg F.

Next step is to put a shroud around the radiator. I had to tilt the radiator to get it to fit (seems to be quite common with Cobras). So I'm concerned the airflow is not properly penetrating the rad but going over the top.

With regard to insulation, I came across a product called 'Lava Shield', made from crushed volcanic rock. Testing shows it can reduce bonnet/hood temperature by around 20% (one test showed a reduction from 121 deg F to 101 deg F). Anyone had experience with this product?

Cheers,
Greg
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