7.3 sounds like a jet taking off over 4,000 rpm
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4wd High
Joined: Nov 2024
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7.3 sounds like a jet taking off over 4,000 rpm
I bought a new class C motor home this spring that’s built on a 2024 Ford E450 Super Duty with the 7.3. Love the power that the engine has compared to my previous class C on a Chevy 4500.
The only thing I don’t like is when going up a grade or hill that requires a downshift and RPMs hit 3,800 to 4,000 the engine starts to roar like a jet taking off. Is that normal? Is it the fan kicking in or is there something going on with the air box?
The only thing I don’t like is when going up a grade or hill that requires a downshift and RPMs hit 3,800 to 4,000 the engine starts to roar like a jet taking off. Is that normal? Is it the fan kicking in or is there something going on with the air box?
Fleet Mechanic
Joined: Jul 2008
Posts: 1,937
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From: Southern Crescent
Does the RV have a "doghouse" to cover the engine? I don't think a doghouse could possibly offer the same sound insulation that you get in a conventional cab pickup. Not with that much engine, anyway.
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4wd High
Joined: Nov 2024
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There’s a doghouse but it’s made out of plastic. I haven’t removed it but I’m willing to bet that there’s probably little or no insulation.
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cody -mac
1994.5 - 1997 7.3L Power Stroke Diesel
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Mar 2, 2008 09:44 AM
