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Old 07-30-2013, 11:43 AM   #1
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E350 Hood Scoop

Would installing Air Scoop on hood of a E350 Class C Motor Home reduce Engine Bay/Dog House heat?. Has anyone ever done this?

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Old 07-30-2013, 11:51 AM   #2
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Doubt it. Wind tunnel tests on hood scoops less than 6 inches tall show they have NO effect. The scoops on all the muscle cars of the 60's were for show, not go.

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Old 07-30-2013, 07:35 PM   #3
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On my E350 based C, there's so little air across the windshield I hardly even get bugs stuck to the window.

I think you'd get way more air increase putting a scoop under the front half of the engine to increase the vacuum thus drawing more out of the engine bay.
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Old 08-20-2013, 10:49 PM   #4
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This MIGHT help... just a bit.

Many, many.... many years ago, in my hot rod days, I got the bright idea to shoehorn a 427 into a '37 Chevy's engine bay. Needless to say, there wasn't much wiggle room in the compartment... and because I'd had to use tubular headers to make it fit, under hood temperatures were a wee bit excessive.

I wanted to retain the hood sides, as if I could keep a Rat Motor a secret, and as a consequence of being enclosed, vapor lock was a constant source of "amusement". Even adding a cool can for the fuel line to pass through, provided limited relief.

What I did to pull the hot air out of the engine bay was pick up a couple of heavy duty, 12v blowers, set them up to pull air out of the engine bay and ran some metal flex tubing out, towards the rear of the car. I installed a switch so I could turn them on and off.

Surprisingly, they actually worked well enough to keep the fuel from boiling in the float bowls of the carbs.

I don't know if such an arraignment would make enough of a difference to reduce radiant heat from coming through a doghouse, but it might be worth a try. Perhaps you could use a pair of high flow bilge blowers, available through a marine supply house.
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Old 08-21-2013, 11:24 AM   #5
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Best thing to do is to pull the seats and carpet out. Then apply a good layer of a foil backed heat blanket to the floor and reinstall the carpet and seats. Also line the inside of the engine cover with the insulation.

On a class C we had, I used....Bonded Logic Heat/Sound Insulation - JCWhitney

Use high temp spray adhesive to hold in in place and seal the edges with the foil tape.

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Old 08-22-2013, 07:10 AM   #6
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As you've seen in other posts you can put down Dynamat inside the cab on the floor and doors to reduce heat and there are several other products that can be placed inside the engine compartment to reflect the heat away from the cab. By doing both you will reduce road noise and give your AC a well deserved rest.

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