Muffler selection

[Phoneguy]

knocking? that's horrible.

Yeah that was back in 2011 in May at the Nationals there. I have had more than my share of engine/tranny issues.
My new trans started flaring on the 2-3 shift in BG...I will be road tripping to Richards shop again over Christmas

Bryan

 

[buddy]

17156 is the part number on mine. 14" body, offset-center 2.5" . Every once in a while I do get a rattle from the valves. i have had mine since 2010 and i understand that they have made a change to the design although I do not know that to be a fact. I love mine.....

Bryan

Valve Rattling from muffler change?

 

[Pronto]

There are valves on those mufflers. http://www.dynomax.com/mufflers/dynomax-vt-mufflers

 

[buddy]

I had no cat and slp loudmouth exhaust on an lt1 and the drone/popping on decel/ was horrible. I call it rasp but when accelerating it was almost like a distinct clapping, that I hated too. Does anyone have sound clips of differnet mufflers on the turbo 6??

 

[Eticket]

The popping on decel likely has something to do with decel fueling. What I've heard is, the meaner the exhaust, usually, the worse the drone. Seems like the RJC crossflow system might be a good middle of the road choice, but I know you already have piping. I really like the sound of magnaflows, the two cars I've heard with them on, but I'm not the one to give up performance for it - unless you want to uncap the dump at the track.

if you send me your email, I can try to take a sound clip of your exhaust with these dynomaxes on them. That might be as direct as you can get to understand what your car might sound like with the same system. keep in mind though there's a few things that affect exhaust "sound" like what type of air filter setup you have and how big the exhaust wheel is on your turbo and your cam. I have a bigger turbo (65mm exhaust - seems to raise pitch) and closed ATR can type air filter setup (reduces drone). Yes the air filter setup has something to do with it too.

 

[T What?]

http://www.nastyz28.com/forum/showthread.php?t=228693

please don't take too much offense T what, but please don't suggest anyone putting magnaflow POS's on any turbo car. If you do a little research there are guys that have seen some boost loss on this board (therefore restriction).

Maybe not dynomaxs, but anything but magnaflows unless you can ensure they are correctly made before you put them on.

I won't take offense from any Internet expert. Lol. Mine are straight through and I LOVE them. Where do you see I suggested them?

 

[Eticket]

Post number eight.

If you click on the link, you'll see what I'm saying.

 

[CatMan00]

Anyone know the size of stock muffler? Can a 19in fit and what is the inlet diameters? 2 1/4 or 2 1/2? I'm seeing both online.

 

[chris romani]

Anyone know the size of stock muffler? Can a 19in fit and what is the inlet diameters? 2 1/4 or 2 1/2? I'm seeing both online.

This post is from 2014.

 

[1986 Buick GX1]

Anyone know the size of stock muffler? Can a 19in fit and what is the inlet diameters? 2 1/4 or 2 1/2? I'm seeing both online.

The 2 inlets and 2 outlets are 2 1/4”
The muffler itself measures 5”x 10”x 18” long.
It looks like a 19” long muffler will work as there’s a couple inches between the muffler and the hangers on each side.
Mine is on the shelf if you need anything else.

 

[GNVYUS 1]

Borla XS, great power and sound yet not as loud as others that made less power. The power band is almost the best at every rpm range vs the others except Bassani Street.

 

[CatMan00]

Borla XS, great power and sound yet not as loud as others that made less power. The power band is almost the best at every rpm range vs the others except Bassani Street.

Than you so much. This is what I was looking to get. I wasn’t sure if it would sound good or create problems. No one has anything about them from my good search.

 

[CatMan00]

The 2 inlets and 2 outlets are 2 1/4”
The muffler itself measures 5”x 10”x 18” long.
It looks like a 19” long muffler will work as there’s a couple inches between the muffler and the hangers on each side.
Mine is on the shelf if you need anything else.

Man thank you!! I appreciate it. Helps with ordering the right one.

 

[CatMan00]

This post is from 2014.

I know but I supposed if I couldn’t respond it would help those like me who recently got one from having to sift a separate thread.

 

[CatMan00]

The 2 inlets and 2 outlets are 2 1/4”
The muffler itself measures 5”x 10”x 18” long.
It looks like a 19” long muffler will work as there’s a couple inches between the muffler and the hangers on each side.
Mine is on the shelf if you need anything else.

Do you by chance know of any one who makes a cat back 2.5 without a muffler? That way I can put my own mufflers into them? Would like to do Borla but they don’t seem to have a grand national catback.

 

[1986 Buick GX1]

I’m pretty sure the Pypes systems, both 2 1/2” and 3” can be purchased without mufflers.
Something to keep in mind when buying mufflers, straight through perforated core mufflers make the most power on our cars.
The baffled ones (flowmaster and the copies) are not as good.
Even flowmaster came around and now offer straight through perforated core mufflers with an oval case along with cherry bomb.
The heavier and more dense the packing material, the deeper the tone.

I wanted a straight through perforated core muffler that was quiet for our 2010 Escalade ESV. I think Cadillacs should sound powerful, just not loud.
Nobody made a direct replacement, so I made my own.
I thought about using slots like the original ATR Pitbull mufflers, but in the end I drilled 880 1/4” holes. I used stainless steel steel wool and ceramic fiber blanket for the packing. The muffler is 3.5” offset in/ offset out 14”x 8”x 26” long. It turned out just a bit quieter than the factory muffler. It’s very deep toned and sounds very healthy when accelerating with no drone inside. I lucked out as it was just what I wanted.
Just some stupid cool stuff I do.

 

[1986 Buick GX1]

The SGG50 is the P/N for the 2 1/2” no muffler kit.

The 3” no muffler kit should be SGG51, but wasn’t listed on their site.
It should be available through Summit Racing or Jegs and possibly the Buick vendors.

Borla uses heavy dense packing for a deep tone and by the chart is a good choice.

 

[CatMan00]

I’m pretty sure the Pypes systems, both 2 1/2” and 3” can be purchased without mufflers.
Something to keep in mind when buying mufflers, straight through perforated core mufflers make the most power on our cars.
The baffled ones (flowmaster and the copies) are not as good.
Even flowmaster came around and now offer straight through perforated core mufflers with an oval case along with cherry bomb.
The heavier and more dense the packing material, the deeper the tone.

I wanted a straight through perforated core muffler that was quiet for our 2010 Escalade ESV. I think Cadillacs should sound powerful, just not loud.
Nobody made a direct replacement, so I made my own.
I thought about using slots like the original ATR Pitbull mufflers, but in the end I drilled 880 1/4” holes. I used stainless steel steel wool and ceramic fiber blanket for the packing. The muffler is 3.5” offset in/ offset out 14”x 8”x 26” long. It turned out just a bit quieter than the factory muffler. It’s very deep toned and sounds very healthy when accelerating with no drone inside. I lucked out as it was just what I wanted.
Just some stupid cool stuff I do.

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This is nice.. I need to provide clarity. Is there any 2.5, 304 stainless steel w/out a muffler? I'd like to do a Borla muffler (like their sound and it sounds like their drone capabilities is recommended by some on this board). Their mufflers are all 304 grade and I was trying to keep it the same.

 

[GNVYUS 1]

ATR used to sell the 2.5" SS Y pipe for us if that's what's your looking for. I still have that and then ran pipes out the sides. There's got to be piping kits no muffs for us out there.

 

[CatMan00]

ATR used to sell the 2.5" SS Y pipe for us if that's what's your looking for. I still have that and then ran pipes out the sides. There's got to be piping kits no muffs for us out there.

Going to look them up now. It's crazy how much there is out there and how much some stuff is extremely hard to find