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Old 03-27-2016, 07:15 AM   #1
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Flow master

Would flow masters help improve gas/performance on 1992 ford 460? Thank you for any assistance. Cheers

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Old 03-27-2016, 08:24 AM   #2
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If you have a catalytic converter in the system, a free flowing muffler isn't going to help much.

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Old 03-27-2016, 08:50 AM   #3
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Looking at possibly doing a custom "free flow" exhaust system and a 5 Star tuning package on my '03 Ford E450. Does anyone know of an exhaust shop in central VA that would work on an RV? For anyone who has done this, was there a big change in exhaust noise and performance?
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Old 03-27-2016, 08:50 AM   #4
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Have a look at the Banks kit for the 460. I have the full system on my 96 class a. No cats on mine. Really helps with the added power. I have flow master's on everything else. May end up changing the banks muffler out in time.
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Old 03-28-2016, 07:24 AM   #5
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Flow master

Thank you for your response. I will check to see if there is a catalytic converter and of not, most likely install they flow master. Cheers
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Old 03-29-2016, 02:52 PM   #6
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A '92 Ford Class C chassis should have a catalytic converter. A free flowing muffler will help the exhaust flow a bit better but the exhaust manifolds are the real restriction. The stock manifolds are OK at idle and light cruising but when your foot is in it they flow about as good as a potato in the tailpipe. The cat and stock muffler just add to the restriction.
BTW, nothing but a light foot and slower speeds will help mileage.
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Old 04-07-2016, 05:35 PM   #7
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ever think about a high flow cat along with a performance muffler?
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Old 04-08-2016, 04:45 AM   #8
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I bought my 04 Ram 1500 in november 03. Drove it a week, slapped on a Flowmaster, and picked up 2 mpg, putting me at 19-ish on the highway (not bad for a full-size truck!). Drove it until about two years ago, when the weld let off and the V-baffle inside the flowmaster started to rattle. So with 275,000 miles on the clock, I assumed the truck would not last much longer, so I went to the muffler guy and just asked for a cheap glasspack, to get me through until the engine gave up its ghost. The guy STRONGLY encouraged that I use a Magnaflow, instead. Basically, a oval-shaped muffler, built like a glasspack, but with stainless steel "steel wool" inside instead of fiberglass. Also, the outside case is stainless. And the tube through the middle was almost straight.

I slapped that sucker on, hit the highway, and I now get 21 mpgs, and it still has that aggressive tone, but about half as loud.

I will use Magnaflows from now on on everything.

The rest of my setup is stock, with cats, 2-into-1, mufflers were 1-in/1-out with a downturn.

I will turn over 310,000 miles in the next week or so. This hemi is indestructible!
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Old 04-08-2016, 08:08 AM   #9
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I'm not familiar with the high flow cat but will look into it. The catalytic converter on there right now is a big unit. It makes sense to have the best flow as possible as I don't want to spend the big bucks for a banks system.

The discussion thread is great and has given me a lot to think through. Cheers to all.

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