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Quietest muffler for V8 Z?


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Gary,

 

Do you happen to have any pics of the underside of the car with this exhaust installed?

 

Thanks, Joe

I don't have a shot while on the rack, but this may help. I copied a friend's car that has an old school SBC with the same piping & muffler and it sounded good, as well. Not the prettiest, but functional and didn't cost me a fortune.

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It's going to end up with how much HP are you willing to trade off for being quiet.

 

When I decided on the layout for my car, after digging it seemed that glass-pack type mufflers were the best balance of performance vs sound reduction.

 

I read through a bunch of Vizard and other's stuff.  Actual testing across manufacturers on the same setup is shockingly difficult to find.  Half the articles about mufflers cite professionals from one company or another who always insist their own design is best.

 

I did find this post when I was looking: http://www.bangshift.com/forum/forum/bangshift/tech-section/3202-some-muffler-test-info

 

I ended up with a pair of these https://www.summitracing.com/parts/sum-633222 tucked up next to each other where the stock muffler should be.  I don't think what I did will fit with the stock bumper shocks.

 

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I have this video, but, I have no idea how much normalization my phone does by default for sound being recorded.  It is noticeably quieter when the car is actually on the ground.  And probably because you're then much higher than the exhaust compared to where my phone recorded this from.

 

https://youtu.be/5B2p1C9UAK4

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 Here is my 77 280 with 2 1/4 in back to the diff then 2 1/2 to chambered muffler. I do not have carpet just two rubber mats. I have to roll down my windows to here exhaust, and I have 60,000 miles on the muffler it was put on in 2014 I had a turbo muffler before that.

 

 

 

 

Edited by 720fast
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  • 5 months later...

I posted pics of the setup in a previous post (above), but here is a video inside the car (pretty quiet with the whole car having dynamat on entire floor from firewall to tail light panel) and an external video.

 

https://www.youtube.com/watch?v=buv8BZUvj3c

 

https://www.youtube.com/watch?v=heKu1qdrbzg

 

It is quite and sounds good for only have a single stainless Magnaflow muffler with dual 2.5" inlet and single 3" outlet.

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 Here is my 77 280 with 2 1/4 in back to the diff then 2 1/2 to chambered muffler. I do not have carpet just two rubber mats. I have to roll down my windows to here exhaust, and I have 60,000 miles on the muffler it was put on in 2014 I had a turbo muffler before that.

 

 

 

 

 

It's funny how we both used the same stretch of road in our videos!  :-)

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