Re: Muffler


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Posted by Tom in Indiana [216.249.65.68] on Friday, August 08, 2014 at 07:30:18 :

In Reply to: Re: Muffler posted by Ken Dunnington [75.171.232.39] on Thursday, August 07, 2014 at 23:57:38 :

The variables are so great that it's impossible to give you a "right" answer. Is it totally stock with exhaust manifolds? Is it a 500-horsepower, fire-breathing monster with headers? Do you want it whisper quiet, loud, obnoxious, rumbly, deep, cackly, or even to make it whistle? To give you a very rough baseline to go by:

If you want it quiet and it's near-stock, go with a pair of turbos, 2" exhaust.

If you want it quiet and it's cammed to the moon, turbos and 2 1/2" are as close as you'll get.

If you want it to sound like crap with ANY engine and see the least power gains as well as annoy everyone within earshot, run glasspacks/Cherry Bombs and 2". Cherry Bombs are a muffler design that should be banned for more reasons than one.

If it's stock, you have space constraints and you want it to sound quiet, run glasspack-style turbos (NOT glasspacks). Again, stock should never be more than 2" on your duals.

If you want it to be very deep-sounding and fairly aggressive with even a stock engine, go with Flowmaster Super 40s or Super 44s.

If you want it VERY loud and aggressive, run Flowmaster Super 10s. They are not really designed for street use, but they are legal.

If you want the best-performing all-around mufflers that'll outlast your truck and sound like it means business, use Borla XR-1s.

The best-sounding quiet exhaust I've ever ran was a pair of glasspack-style turbos with Megs slant-cut exhaust tips and everything 2" with exhaust manifolds. It had a slight "drone" sound that modulated through different frequencies at certain speed/RPMs. If you hear all of those Mustangs that have that deep, throaty sound running around, imagine that sound without the loudness and a higher resonance.

The FUNNIEST-sounding exhaust I've ever ran would absolutely be what I ran on a '73 Duster 340 that had a very aggressive camshaft in it when I was a teenager. It had headers and 2" exhaust that exited right behind the doors. I had a pair of glasspacks that the guts had been removed from, then a pair of Monza Pacesetter resonating tips at the ends. With the rough idle it had, it sounded like two Volkswagen Beetles talking to each other... it chirped. It was hilarious to listen to, but I'd have been better off running Flowmasters or XR-1s for better performance.

For my '50 B-2 Power Wagon, I bought a pair of Flowmaster Super 44s and turn-down exhaust tips. The 360 that's going into the truck runs a cam with 224 degrees of duration at .050" and .513" lift on a very narrow lobe separation with lots of overlap, so it will idle VERY ROUGH. With headers, 2" exhaust and ending right in front of the rear axle, it will be deep-sounding, moderately loud, and noticeably rumble... obnoxious to just about everyone driving a Prius or attending Sunday mass.

I could list another 20 combinations, easily. Without more information about what you're wanting from an exhaust, that's as much as I can give you for now. If money is no object, go all-stainless, and stainless headers. It's maybe double the price of aluminized or standard steel, but it'll last a lifetime. Me? Stainless, period- I've patched/replaced/lost while driving/watched rust way too many steel setups over the years.



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