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Old 07-26-2012, 01:39 PM   #1
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Need a new muffler

'89 Class "A" 30' Pace Arrow on a JD chassis w/ Ford 460 CUI gas engine. Comments I read say to give this 460 as much breathing capacity as possible, but when I mention the possibility of installing a muffler that has good throughput... Everyone looks at me with that deer in the headlights look... Could I not be asking the right questions? Anyone have a muffler recommendation or source? We live in Jackson, Michigan.

Thanks,
Tom
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Old 07-26-2012, 01:52 PM   #2
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A muffler along isn't really going to improve flow all that much....you'll have to step up to a larger diameter piping front to back to notice a solid improvement. With that said Dynomax makes a full line suitable for RVs. Any improvement is a welcome improvement I guess, right? also, K&N fresh air intakes are also something to look into, if you don't already have one.

A-1 RV Mufflers


People will throw funny looks at the thought of aftermarket mufflers and exhaust on motorhomes, because most think those are upgrades you get if you want a louder, more mean sounding exhaust...and why would anyone want that with an RV?? But what they're forgetting is that RVs really benefit from performance boosts. Just look at the Banks power pack (high-flow headers/exhaust/muffler). Many motorhomes come with it already installed, yet if I told my neighbor I was putting headers on my RV, he'd think I had lost it haha.
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Old 07-26-2012, 04:32 PM   #3
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Quote:
Originally Posted by Tom730 View Post
'89 Class "A" 30' Pace Arrow on a JD chassis w/ Ford 460 CUI gas engine. Comments I read say to give this 460 as much breathing capacity as possible, but when I mention the possibility of installing a muffler that has good throughput... Everyone looks at me with that deer in the headlights look... Could I not be asking the right questions? Anyone have a muffler recommendation or source? We live in Jackson, Michigan.

Thanks,
Tom
In the air inlet hoses from the air cleaner, there are venturies located in those hoses. When you remove the hoses at the Throttle Body side you will see them. If you cut off those venturies you will increase the airflow into the engine and also pick up horsepower.
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Old 07-26-2012, 05:20 PM   #4
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This looks like a good muffler for RVs.
http://www.summitracing.com/parts/WLK-17698/

I personally have a Flowmaster as it was part of the performance exhaust system I put on. It is definitely low-restriction but might be loud for some folks. I don't notice it inside but I'm sure folks outside hear me coming.
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