Muffler Opinions

[ISPKI]

Hello Hybridz!

 

I am gearing up to build my exhaust system for my 77 280z. I have the MSA headers and will be running a short and simple single side exhaust on the driver side. I am having a tough time deciding on a muffler. My system will most likely not be SS and I am only considering chambered designs. Currently, I am trying to decide between Flowmaster Delta 40, Delta 44, and Delta 50. From what I have read, the Delta 40 and 44 are supposed to be pretty loud on the inside of the cabin, whereas the delta 50 is supposed to be quieter all around, but still maintain a deep growl. I have found videos of V8 cars with these mufflers, but how does the L28 sound with them?

[ryant67]

I had a 40 on my 3L stroker, with MSA 6-1 headers and 3" mandrel bent pipe.  It sounded great, but drove me insane - very loud drone inside the car.  The drone was bad to such an extent, that driving on the highway for any length of time was an ordeal.  I switched the Flowmaster out for a Magnaflow perforated straight through muffler about a month ago, and it seems to shift more noise away from the car; it's much more bearable inside the car now.  I would be sure to budget for a resonator as well, if I were you.  

(Edited to tidy up some grammar issues - need to proofread better when severely hungover)

Edited August 30, 2013 by ryant67

[JMortensen]

I loved the sound of my Dynomax Super Turbo. They're cheap and they don't eat up hp on low hp applications. I ran without a resonator, but could see the argument for having one. Never liked Flowmasters on L6s, but YMMV. 

A lot of this noise is intake from the Mikunis, but you get a pretty good idea as I drive past the camera:

http://www.classiczcars.com/photopost/member-galleries/p15578-dynomax.html

[OldAndyAndTheSea]

I second dynomax.

 

I had a super turbo on my l24 and my l28

 

6-1 ceramic coated header leading to a 2.5" straight through exhaust, no resonator.

 

She screamed on a mild l28 build.

 

Now I'm using an ultra flo for my turbo application.

 

 

Here is another Dynomax video link. Take it at face value.

 

http://s524.photobucket.com/user/twofortyz/media/photobucket-20006-1334973775522.mp4.html

[ISPKI]

Thanks for the responses. I will not be adding a resonator to this system however, trying to keep it as simple as possible and I just dont want to deal with having another connection under there. What do you guys think about Borla? I was looking at their Pro XS mufflers and they seem to sound decent and cost a little less than what I was looking at.

[74_5.0L_Z]

I really like my Borla Pro XS mufflers. Great Sound at full throttle but fairly quiet at idle.

[ISPKI]

Do you guys use those stainless 3" band clamps? I do not have a stainless steel welding setup so I will have to clamp all the connections. Hence why I am trying to avoid extra connections.

[ISPKI]

After alot of research and comparisons and audio and video clips, I went with the Borla SS Pro Xs. It was 75$~ for the 2.5" center to center. I also ordered 5 of those 3" SS band clamps for about 60$ shipped and 4 feet of 2.5" SS pipe from flowmaster (they had the cheapest pipe, not sure why) for 40$. I also ordered a smaller 2.25" Borla muffler for my civic as the cheap fart can thats on it is getting on my nerves.

 

I will clean and paint the headers and collector, wrap them in black heat wrap, have the pipe mandrel bent 90 degrees (I am hoping that is enough pipe so that I do not need to buy a separate 90 degree bend), and then seal and clamp the pieces together using the large band clamps and high temp copper permatex. Wish me luck, this will be my first full custom exhaust system.

[310z]

The L-6 is a loud motor with droan through the rpm range that will drive you crazy as stated prior. When I was in my 20s I ran a straight pipe to a Super Trap. I had to ware ear plugs to drive the car. Now I have a Borla but there is a 18 in. resonator also installed. I also have 90 lb. of extreme dynomat in the car. it sounds great. it is still loud enough to get lost of attention though tolerable.

[BLOZ UP]

Any straight through muffler is going to be loud, no matter what the brand. Super-trapp's are a sort of exception. If you want quite, you'll need a chambered muffler, or two or three.

 

I have 36" of Vibrant mesh packs, and a 12" dynomax glasspack. And a turbo. And it's still loud, but manageable.

[ISPKI]

I read that a lot of aftermarket chambered mufflers are still loud and produce an annoying resonance inside the cabin. At the moment, I could not care less how loud this setup is, so long as it runs fine and I can drive the car. I can alter it later to quiet it down.