Muffler opinion

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perko

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Hello,
when I bought my new to me engine, the guy threw in a couple of mufflers from his pile of parts. They have never been used but I was wondering if anyone had an opinion on this style of muffler. I'm going to go with duel exhaust soon on my 318, but I don't want the car to be obnoxiously loud as several of my neighbors have babies. I'm new to this but I think these are a kind of glass pack? they have 3- inch inlets/outlets off centered but the pipe goes straight through with a bunch of holes in it. There is no brand name on mufflers.

Anyway. Has anyone put this style exhaust on a 318? How did it sound?
 

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Do you plan to have 3" exhaust on your car ? -- If not, then you don't want these. -- Plus being straight thru, there likely to be noisy.
 
Those type of muffler can usually be less loud than than the Flowmaster/chambered mufflers. But not a quiet kind of muffler though.
 
Dual 3s are loud no matter what you put on them.But that style is the loudest of all
But if your teener is stockish, meaning low compression, you can get away with a lot.

For instance; if you run dual 3s from the headers to the inlets, with a crossover in there(H is fine), and then neck the outlets down to run a pair of 2s out to the back, with little turn downs; Ima thinking that might be just right. Stay off the throttle in your own neighborhood.

If you really want quiet, you almost have to have reverse flows.
 
thanks for the advice. I didn't really want the 3 inch ones anyway, but they were free. I don't want it to be silent, but I don't want to be waking up babies when i go to start it in the morning either. I'll sleep on it.
 
run pipes to the bumper for the quietest and mild tone
If they go out the sides its usually poppy or drumy
And dump under car and its jus loud, and ur breathin fumes

3" pipes talk loud, but the pedal possion has alot to do with that too

Here is a good sound clip
Im runnin headders, 2.5 pipe (kinked bends at shop) with flow supper 44s to the bumper

[ame]https://youtu.be/lkCojy_P74M[/ame]
 
Perko, what is the engine like, stock, mild mods?
 
3" is way to big for a 318. 2 1/2 duel is even pushing it for a hopped up 318. 2-1/4 would yield better performance
 
Well I better inform my teener of that then.

I tell you what, Start running. With your mouth closed. When you can't run any more, open your mouth and run some more.
Why do racecars run open headers? Teeners included.
 
younggun2.0 said:
3" is way to big for a 318. 2 1/2 duel is even pushing it for a hopped up 318. 2-1/4 would yield better performance
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AJ/FormS said:
Well I better inform my teener of that then.
Click to expand...

Same here. I'm running dual 3" with an x pipe on my 5.2 in my Dakota. I have dynomax bullet mufflers right off the headers and magnaflow just in front of the axle. It sounds awesome. Nice deep tone at idle and not loud.
 
cdavis said:
Same here. I'm running dual 3" with an x pipe on my 5.2 in my Dakota. I have dynomax bullet mufflers right off the headers and magnaflow just in front of the axle. It sounds awesome. Nice deep tone at idle and not loud.
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I'm sure it sounds fantastic but it has been proven that a little bit of back pressure builds torque.

As for open headers, merge collectors and short extensions 11-18" long have also proven to increase hp.
 
Summit headers, 2 1/2" exhaust kit with turbo mufflers, no crossover, and no drone. Mild tone until you hit the WOT peddle. I have manual dumps I uncap at the track.
 
AJ/FormS said:
Yabut, Is it slower with that system?
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I don't have a before and after. I swapped from a v6 to the 5.2 and built the exh when I did the swap.

younggun2.0 said:
I'm sure it sounds fantastic but it has been proven that a little bit of back pressure builds torque.
Click to expand...

It's possible smaller exh could make it quicker. It went 13.27 @ 102.xx at 3800 lb race weight, so it's no slouch. 8.8 cr and small magnum roller cam 210/220 @ .050. It dynoed 290hp/286tq at the wheels. The main reason I went with 3" is because I'm planning on twin turbos.
 
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