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Old 12-19-2023, 11:27 AM   #11 (permalink)
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I've removed my oem sound insulation from my hood, and threw on a sheet of standard craft paper backed r-13 over my engine from side to side. Makes a huge improvement in holding in heat. It would be on the prius when the engine would shut off the temp would go 1..2...3...4...5... essentially losing a degree a second (in 25-30F. Now with insulation it really doesn't lose it very fast.
It was pretty much impossible to stay in hybrid mode (above 150F) without. Now with upper and lower grill blocks, i can use a small amount of heat and get almost summer gas mileage in 45mph and down scenarios.

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Old 12-19-2023, 12:17 PM   #12 (permalink)
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Originally Posted by twj347 View Post
Do you know what kind of aluminum bubble insulation you used, or what its temperature rating is? I looked into using this type of insulation before, but the stuff I found is only rated for temperatures up to 180 įF.
No idea. I donít even think my hybrids engine bay can get that warm in cold months.

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