Quote:
Originally Posted by Phase
so cheapest and best solution is wrap the fiberglass in alumunim? my overall budget for insulation is 100 bucks for my hood. i care about performance and safety
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I don't know if cheapest and best can go in the same description, but if you mean best bang for buck, then probably yes. The aluminum foil would also help keep air from blowing through the fiberglass, which would also be bad.
The only problem is fiberglass works best when fluffed up. Putting anything on it to hold it down compresses it and makes it lose its R value. Maybe thick aluminum foil could cradle the fiberglass just well enough it stays fluffed up but doesn't fall off the engine.
Mineral wool would be better IMO as it tends to hold its shape better. It is also non-flammable, whereas fiberglass can catch flame after a certain temperature. Of course, if you get any oil on either and you now got a wick.