baseballguru44 Posted October 10, 2019 Report Share Posted October 10, 2019 Looking at replacing my rusted out exhaust. 1985 720 4x4 with carb Z24. Wanted to ask opinions mainly on a muffler. I would like something free flowing, not very restrictive, but also not obnoxiously loud. I've heard good about Walker, Magnaflow, Flowmaster, and a few others. 1 Quote Link to comment
datzenmike Posted October 10, 2019 Report Share Posted October 10, 2019 Most are over priced (paying for the advertising) tin cans.... and not that quiet. I would get a turbo style. They are lower restriction but not direct straight through and have lots of sound absorbing material inside. Hell I just got a physically larger muffler (wider but close to same length) with 1/4" larger inlet and exit. Used 1 7/8" to 2 1/8" adapter to mate to my pipe. On the outlet just a 450 down bend. It's quiet but it's not 'quiet' if you know what I mean. 1 Quote Link to comment
Stoffregen Motorsports Posted October 10, 2019 Report Share Posted October 10, 2019 Brand names mean less than the muffler style. Turbo style mufflers are one step more aggressive over most stock type mufflers. Then you venture into "lazy S" style straight through mufflers, which may be a bit loud for you. You could use an OEM resonator if you can find just the right application. For example - on the Toyota FJ60/62 LS swaps I do here in my shop, I use a 3" muffler from a 1990s Chevrolet 3500HD. 1 Quote Link to comment
G-Duax Posted October 10, 2019 Report Share Posted October 10, 2019 My 2.5", all stainless system, with 18" SS muffler, and SS pre-muffler, is nice and quiet....... with my ear plugs in.... :-) 1 Quote Link to comment
datzenmike Posted October 11, 2019 Report Share Posted October 11, 2019 Free flowing and not obnoxiously loud are somewhat mutually exclusive. Restriction is the easiest cheapest way to make quiet. Less restriction = louder. Resonance chambers can cancel exhaust pulses but it works best at a set RPM. Some have sound absorbing linings inside. They can be packed with fiberglass mat and stainless 'wool' to slow the pulses down and delay their sudden explosive escape to the outside. Some have an electric actuator that will by-pass much of the exhaust around the actual muffler. It can be turned on by a throttle switch allowing a quiet muffler to be used but more free flowing (and louder) when you want it. 2 Quote Link to comment
Z-train Posted October 11, 2019 Report Share Posted October 11, 2019 2 inch pipe into a Walker super turbo. Quiet unless your foot is in it. Flowbastards are the worst. 3 Quote Link to comment
G-Duax Posted October 11, 2019 Report Share Posted October 11, 2019 LoL ! Flowbastards, that is what we call them around the house also. Was always intrigued by the Hooker Aero Chamber design, but have never tried one. 2 Quote Link to comment
Stoffregen Motorsports Posted October 12, 2019 Report Share Posted October 12, 2019 Flowmasters sound like crap on 4cyl engines. 2 Quote Link to comment
Lozer Posted October 12, 2019 Report Share Posted October 12, 2019 turbo mufflers if you want loud. Flowmasters r garbage on 4 bangers, go get em at the JY for 20 bucks a muffler. 2 Quote Link to comment
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