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Originally Posted by jazzie604
an engine doesnt just need more heat, it needs a very specific heat range. anything you can do to get the cooling system around 200-210 and keep it there is going to help the engine run well...
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While it's running - sure.... But most of a car's life - the engine isn't running and from the instant the engine is killed to the instant it reaches ambient temperature - heat is being pulled away, lowering the temperature from optimal.
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for most engines I would say this is over kill. but for the insight or other small engines it seems great.
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I don't think it's so much engine size... It's size v. load. A small engine maintaining high % power output is very well likely to get hotter than a large engine running at a low % power output. Granted, that's a hybrid application
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That said... of the yachts I've worked on AND seen the engine room.... All of them had blankets covering the engine, exhaust, coolant lines, heat exchangers, etc. The engineers on board say it's for sound dampening (still need ear protection while the engines are running), fire protection and insulation. These are by no means small engines either - we're talking 2+, SUV sized turbo diesels
These blankets, on the outside, looked like woven fiber and were ~3/4" thick.