So, with my recent restoration I added dual exhaust and told my restorer I wanted quiet mufflers. He said he got the quietest he could find, but it's still loud. Any suggestions for real quiet?
What mufflers are they? 2 1/2" system? Long case mufflers like the Walker 17749 are about as quiet as you can get.
Walkers flow the best and are the quietest. In a couple of big, multi brand tests, the loud ‘floormasters’ were, oddly, most restrictive. Patrick Here’s a test from Jim Hand’s book: https://pontiacstreetperformance.com/psp/exhaust.html
Not being sarcastic but that’s one odd complaint for a pre-emissions v8 car, those 2 pipes obviously generate that v8 sound regardless of the brand , but the other reason was balanced efficiency. The result is most often a pleasant low rpm rumble, like at idle especially through a packed stock style muffler. Just my two cents, sweet car ..: but no one in my Buick circle talks about quiet so it just generated a chuckle . Good luck on finding peace
You may think I’m crazy but if you add glasspacks before or after your mufflers it will kill a lot of noise and drone. They are barely thicker than an exhaust pipe so they fit many places. Alone they are loud and and annoying but paired with a muffler they work great to reduce the noise. https://www.amazon.ca/Walker-24440-...ocphy=9001292&hvtargid=pla-783432819299&psc=1 I had a little Chevy tracker with a 2.0 4Cyl and it had a flowmaster muffler installed before I got it. It was annoying, drone, and popped on deceleration etc. I added a glasspack before the muffler and it was perfect. You can also get small resonators that will also help. https://www.performance-world.com/Resonator-p/223516r.htm
Depending on the size of your pipes, a couple of Cadillac mufflers from the likes of a 500 CI Coupe de Ville might be too quiet. Since one of them is good for flow from a 500 CI engine, I wouldn't expect restriction to be an issue...
Flip the air cleaner over it will take away some of the sound from the mufflers.lol Stop flooring it for quiet sound.
ok, yes, I realize I'm the minority here re: sound, but I prefer a low grumble rather that the aggressive sound.
I wouldn't say you are the minority. I like my car to be relatively quiet until I step on it. The Walker long case 17749 is the way to go for a 2 1/2" system. I currently have a 3" system with X pipe. I am using Magnaflow mufflers. They have the same characteristics as the Walkers I used previously. The car is surprisingly quiet for what it is.
This is a walk around of my riv right after installing the Walker long case mufflers and 2.5" exhaust system. The air compressor picked a bad time to cycle on.
Flowmaster 70-series mufflers. They are big BUT they are quiet and they flow great. And if you have it in the budget, an x-pipe really tames your idle too (much better than an H-pipe). This the setup we have on our 455 LeSabre that runs 13s - AND is quiet enough to take the teenagers on a long trip. -Bob C.
Briz, two thumbs up!! your car sounds bad a$$ and looks great! Love that special hood on there one of a kind there.
