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Old 01-23-2003, 03:12 PM
ramcharger_440 ramcharger_440 is offline
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Default 3" or 2 1/2" exhaust?

I am building a mild 440 with Edelbrock RPM intake,holley 800 carb, Hughes cam (219/223 duration,.489/.504 lift, 112 degree) and headers with a 3" collector. The heads are stock 452's that may later see work. I am also considering 1.6 ratio rockers for later. The 440 is in a Ramcharger with 456 gears and 727 tranny. Should I go with 3" or 2 1/2" exhaust? Many thanks for your help.
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Old 01-23-2003, 04:30 PM
451Mopar 451Mopar is offline
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As mild as your combination is the 2.5" duals would be fine, and easier to fit. The 3" system would look cooler and probbably be louder, but I'm not sure you would see much difference in performance.

The trick is smooth kink free exhaust tubing and good flowing mufflers.
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Old 01-24-2003, 01:21 AM
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ehostler ehostler is offline
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I'd go with a 2½" system with an X-pipe
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Old 01-24-2003, 01:43 AM
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440cj 440cj is offline
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Idea I second Ehostler, plus

...also use Dynomax Welded Ultraflows, they are mostly resonant free and outflow Flowmasters to boot. Oh jeez, there I go opening THAT can of worms again! 440cj
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Old 01-24-2003, 01:55 AM
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sycboi sycboi is offline
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You can't beat the sound of a healthy BB Mopar with dual 3" exhaust (w/ an x crossover),and some chambered mufflers!
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Old 01-24-2003, 02:52 AM
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charger_dan charger_dan is offline
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Ramcharger,
I'm running a 440 that's similar to yours in my '68 Charger.
I swapped from 2-1/2" dual exhaust (cheap turbo mufflers)
to 3" aluminized exhaust with Flowmasters and H-pipe.

Here's what I found:
- Sounds a little louder, and throatier (you hear the cubes more)
- Sounds WAY cool at wide open throttle
- Car feels more responsive overall
- Lightened my wallet more than 2-1/2" exhaust would have

Consider 3" exhaust now if you plan on future power
upgrades (more head flow, cam, gears, etc.).

451 is right - whether you go for 2-1/2" or 3" tubing, make sure
you find a good shop that will use a mandrel tube bender to create
nice smooth bends.

If your performance level is going to stay pretty much the same,
I'd check out the overall price difference and let that be the
deciding factor.
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