24v - Vibrant muffler = Me not happy

[johnjohnsons54]

I just ordered some parts for my S52 the other day.

From the headers back I'm going with no cats and 2.5 in piping....

Vibrant Ultraquiet Resonator>>Borla ProXS>>Megan M-DT

http://www.meganracingperformance.com/stainless-steel-dual-tips-inlet-mdt-bmuffler-megan-racing-mdt-p-449811.html

I reeeeeeally want this to sound nice and deep/throaty with minimal rasp.

Fingers crossed that it will sound good. Clips will be posted as soon as she's done

[mtlbloodshot]

Is it very common for 24v to have two mufflers inline instead of a res or cat before?

[TimKninja]

Just thought I'd bump this.

Put the Borla ProXs to Vibrant street power on my car last night. 2.5 inch diameter. S50 .

It sounds so glorious , but it is loud. Not alot of droning. But it's loud .itll be a cop magnet if your not careful.

[Jand3rson]

Gotcha. Still trying to learn the details and the specifics of exhaust systems.

[e30polak]

nah. it's because there is only 1 muffler. even a 2.5" with 1 muffler is going to be loud.

This. When I initially switched to single 2.5" I put a 14" Glasspack, straight to the Vibrant, and it was MUCH louder then my dual muffler set-up. I left it like that for a week before putting the Borla in the middle.

[nando]

In bold is part of your loudness problem. No need for 3" piping on an NA motor. It's actually amplifying the sound.


It was done at the same shop here in Bend that does all of my PC work. I don't know the temp specs, I could probably find out. I considered JetHot, but the shipping hassles turned me off. It was much easier to find a place locally. Cost was about $14/ft.

nah. it's because there is only 1 muffler. even a 2.5" with 1 muffler is going to be loud.

[Massakista77]

Funny I have Ireland engineering shorties > y pipe > magnaflow cat > 22" resonator > vibrant stealth muffler. I love it not raspy at all no highway drone and goes from deep growl low rpms to a nice sound at high rpms. I have single 2.5 inch piping.

[Jand3rson]

It is not amplifying the sound. It is harder to damp the sound as efficiently. By sizing pipe smaller, you make it easier to quiet down an exhaust system from a geometry standpoint--that is, the smaller the piping is, the easier it is to quiet down a system by using smaller mufflers/resonators. So if you have a 3" exhaust, you must choose larger mufflers.

What I meant to say, just came out wrong. The larger piping is still a large part of the reason for it being louder.

[FredK]

^ i'm considering a 3" for my s52 swap for future expandability (read: s54 in a couple years). was 3" too much for a stock s52 in your experience? not in terms of loudness, but rather power/torque.

No. In a typical 6-2-1 E30 exhaust, everything past the last exhaust collector is trivial. Single 2.5 or 3.0 tubing post-merge will have an infinitesimal effect on power.

So what DOES affect power?

• Exhaust primary size and length. People with Racelands are leaving area under the curve on the table as the primaries are HUGE.
• The quality of the merge also has an effect, though it is smaller in comparison. You can't see the quality of the merge from the outside, but if there is poor, bulky welding and bad pipe fitup, you stand to lose a whp or three at the highest flowrates.
• The geometry of your second merge collector (2 into 1) will also affect power-- angle of the merge, the size of the choke, length and angle of the post-choke transition (commonly called a megaphone).

In bold is part of your loudness problem. No need for 3" piping on an NA motor. It's actually amplifying the sound.

It is not amplifying the sound. It is harder to damp the sound as efficiently. By sizing pipe smaller, you make it easier to quiet down an exhaust system from a geometry standpoint--that is, the smaller the piping is, the easier it is to quiet down a system by using smaller mufflers/resonators. So if you have a 3" exhaust, you must choose larger mufflers.

[ScHpAnKy]

found that the 14158 is a round muffler, yours is?

Sent from my SGH-T769 using Tapatalk 2

hmm, in actuality it looks more like the 10416, I'm not exactly sure on the exact model# but the actual muffler is around 12" in length with entirety around 20" in length with a 2.5in and out diameter

[emmanuel.dlc]

14158, I believe? I can't find the PM from the guy I bought it off of here, but it's 2.5" in and out, and about 12" long.

found that the 14158 is a round muffler, yours is?

Sent from my SGH-T769 using Tapatalk 2

[ScHpAnKy]

can i get the magnaflow part number? i love the sound.

14158, I believe? I can't find the PM from the guy I bought it off of here, but it's 2.5" in and out, and about 12" long.

[hooken m]

haha thats my goober friend. He was giggling like a school girl

lmao same here with my ones of my friends. i did a nice little slide for him and he was literally a little school girl

[craiggroves91]

Oh my gosh

haha thats my goober friend. He was giggling like a school girl

[TimKninja]

Here's an idea of how mine sounds, not great quality, but whatever

2 2 1/2" from exhaust manifolds---->dual 2 1/2" in to single 3" out----->3" in/out Vibrant Ultra Quiet Y-pipe converter----->3" in and dual 3"out Vibrant Streetpower stealth

Oh my gosh