Subaru BD resonator info.. glasspack? race bullet? need info

[d1giPhux]

I'm looking for some quick info on the stock BD mid-pipe/ resonator(s).

How many resonators are on the pipe?
Anyone have any pics of the stock midpipe?

I'm looking to get another resonator welded on my mid-pipe.. or have a custom pipe made for me with 1 extra resonator.

If you have any info about the stock mid pipe and how many resonators it has on it, also maybe their size as well.. any info would be great as I'm going to be getting a custom pipe made to quiet my car down a bit after header install.

Or if you have got a custom mid pipe with EXTRA resonators.. let me know about it!

My car is a 99 LGT (BD), and I'm assuming it has 1 resonator on the mid pipe.. but I'm not sure as I've never dealt with it before.


Thanks!

[Okin DaVanh]

you mean where the 2 oxygen sensors are? We have )2edlines 97 BD GT @ the shop now with the entire system (header back) removed.


1-resonator-1 cat- 2 O2 sensors

[d1giPhux]

The oxygen sensors are on the 2 cats arent they? Front and rear? Or at least I'm pretty sure thats how they are on my car.

Have any pictures of that stuff pulled off from his car?

I'm talking about the mid-pipe area with the resonators only..

[d1giPhux]

I'm looking for how many resonators part #12 has on it.. the mid pipe in the following diagram:

https://sl-i.net/FORUM/images/imported/2010/06/exhaustdiag1-1.jpg
https://sl-i.net/FORUM/images/imported/2010/06/exhaustdiag2-1.jpg

Not sure if those are accurate or not.. or if ours have 2, or 1 resonators.

If anyone has a pic of our stock mid / rear pipe or whatever they call it.. that would be awesome. I was thinking about getting an extra resonator put on the pipe so that after I install my headers the car wont be super loud.

[Okin DaVanh]

1

[d1giPhux]

Ah.. so it is like in the picture. Interesting. Anyone have any clue what size the resonator is? I was checking these out:

http://tinyurl.com/295fu96

Guy says they come with 2 resonators.. wonder why? Either way.. that would be good since it would be 1 additional resonator over stock. Either that or i could have him put in larger ones.. maybe 2 15-18" ones. Don't know how much space i have though.

[d1giPhux]

Anyone know what size the resonator (stock one) is? or what size resonator(s) i could fit on the pipe? Any info would be great.. thanks!

[TGX4776]

i'd send you a pic of mine but the po cut it out. why exactly do you need to know the size? I am installing an 18inch resonator on my new exhaust system.

[d1giPhux]

Nice.. are you installing it on the mid-pipe? What type of resonator are you getting?

I wanted to know the size so I could figure out what size resonators will fit on the pipe.. and if 2 would? Thanks.

[TGX4776]

I am doing a Vibrant Resonator. It's a 2 1/4 inch (diameter of the pipe) pipe as the minimum. are you upgrading your exhaust?

[d1giPhux]

Nope.. not upgrading the exhaust.. just looking to quiet it down a bit actually. So the stock pipe is 2.25" eh? What size is the vibrant resonator.. 18" you said? Can you only fit one 18" on the stock mid-pipe you think?

[TGX4776]

no I am not sure what the stock size is. that should be easy for you measure though. It also shouldn't matter the size. if your looking for quiet then install this one http://vibrantperformance.com/catalog/p ... ucts_id=45 (http://vibrantperformance.com/catalog/product_info.php?cPath=1021_1033_1055&products_id=45) it'll be a little wider then the stock size but you could always have it go back to the stock piping afterwards.

[d1giPhux]

wow.. those are super expensive for resonators! damn! Most resonators I've seen.. even performance ones don't go past $50 each! wonder why these are so expensive? They also look pretty damn big compared to most i've seen. have you heard anything about their performance? ive heard the dynomax race bullets if installed in reverse are pretty quality as resonators.

[TGX4776]

I havent heard anything bad about their resonators and AR Fabrication near my house swears by their products. I also picked mine up off amazon for 75.

[d1giPhux]

Nice.. I will definitely keep that in mind. They look like quality products from what I've seen / read so far. Anyone else know any good companies that make resonators?

I'm still looking for anyone with measurments / a pipe laying around they could measure for me. Looking for the following measurements:

- Length of mid-pipe
- Length of resonator pipes attached to mid-pipe

Thanks.

[TGX4776]

i also forgot to address your size question, these look bigger because they are. they are designed to be ultra quiet. you can get a regular vibrant resonator for $47

http://www.amazon.com/gp/product/B002TB ... ss_product (http://www.amazon.com/gp/product/B002TBGDHW/ref=oss_product)

or the ultra quiet one for $85

http://www.amazon.com/Vibrant-1140-Ultr ... 640&sr=1-4 (http://www.amazon.com/Vibrant-1140-Ultra-Quiet-Resonator/dp/B000E3VHW8/ref=sr_1_4?s=automotive&ie=UTF8&qid=1277831640&sr=1-4)

[d1giPhux]

Thanks again man.

Okin: you think you may be able to measure the size of the resonator on the stock mid pipe for me? And also maybe the 'straight' areas of the mid pipe where i could install new resonators.. just to see about how much room i have. Thanks!

[d1giPhux]

What do people think of using the following for sound decibel decrease / high frequency (rasp) filter


-Glasspack aka cherry bomb (i'm assuming these wear out pretty quick because of the fiberglass packing).

http://en.wikipedia.org/wiki/Glasspack

-Stainless pack? Anyone know where to get one of these.. or who makes them. Some type of long lasting 'glasspack' type resonator.

-Dynomax Race bullet (installed in reverse) - I would like to know how long these last. They are supposedly fiberglass filled and reduce up to 4db of sound. I am going to run (2) resonators on the mid pipe if possible, or just one really long one.

http://www.dynomax.com/mufflers.php?muffler=racebullet



Any other suggestions or ideas??


This would be used welded into the mid-pipe and also used with a Muffler, and Headers. That is all. The point would be to decrease the sound before it hits the muffler for the final decrease in sound / high frequencies.

[Reason]

To let the cat out of the bag I have a cherry bomb... off hand I can't remember the length it is, but it's the longest one they make. As for rasp there isnt any. Just deep rumble, ask Okin or )2edline they both heard it in person since I had the work done. Will it wear out yes, not sure how long it takes, but I will replace it with another one next year when I have mu custom cat set up made.

[d1giPhux]

Do you know any of the differences between those different types of pipes? I'm just a bit confused why I'm hearing online if you want to use the race bullet as a resonator you install it backwards? Also.. just trying to figure out what each of them do and what i should go with to use for a RESONATOR and quiet my exhaust down a bit.

I'm sure all of them would really work for that purpose since I'm running both cats, and the muffler, but I just want to choose something that will sound good, and also last a while.

Does anyone know a company that MAKES a resonator / pipe like a glasspack that is made out of stainless materials.. or something that lasts longer then a normal 'fiberglass' glass pack that could be used inline on the mid-pipe?

Thanks!

[ouch1011]

My stock system actually has 2 resonators in the midpipe. Its sitting in the garage...I'll take a pic tomorrow if I remember.

Many different companies make resonators but call them "round mufflers" its basically the same idea. I like Magnaflow or Borla and have used both in the past.

Some resonators have directional "scoops" in the path of exhaust flow. Theoretically you could point the resonator so that the scoops are facing towards the airflow and probably quiet down the sound a bit more, but potentially cause a very slight restriction, or you could point them in the opposite direction of airflow and have less chance of restriction, but less muffling as well. Maybe that is the whole race bullet muffler thing you were seeing?

[d1giPhux]

Nice! thanks for the info. I think you may be correct about the race bullet as it seems like that is what people were talking about. If you have any pics of yours.. that would be awesome. I think my stock one has 1 resonator on it.. so I'm looking to get 2 put on a new one or something possibly.

[Reason]

My cherry bom has "directional scoops" And the correct way it flows is facing the scoops toward the flow, thats how mine is welded in. Maybe I'll do a sound clip, I have one but it sounds like crap using a cell phone.

[ouch1011]

Here is my stock system

https://sl-i.net/FORUM/images/imported/2010/07/20100704_201734s-1.jpg

2 cats, 2 resonators, 1 muffler (not pictured)

Yes, I know the front resonator looks like a cat. It isn't. You can look straight through it, just has a perforated pipe running straight through (like a resonator or most straight through mufflers)

98 BD LGT. Was a 4EAT, now a 5MT.

[Reason]

I think that is the cali emissions setup

[d1giPhux]

Wow.. thats a pretty crazy setup. Yeah.. might be the cali stuff for sure. Thats cool it has 2 resonators.. must be pretty damn quiet stock eh? My stock one only had 1 resonator.. and still only has 1.

Reason: if you can get a clip of the cherry bomb sometime.. that would be pretty cool. I'm really wondering what 'resonators' would be best for performance, and quietness in general. I definitely wanna turn my exhaust down a notch, and will be adding headers when I pull all this off as well.. so need to MAKE SURE i keep it quiet. Even if it means putting 3 damn resonators on there! I do have the SPT exhaust made for the 2.5GT. Thats what I'm currently running.

[Reason]

I have a dual port UEL header, stock cats a 2.5" catback with a 36" (I think) cherry bomb and N1 style muffler, my exhaust is anything but quiet lol

[d1giPhux]

Well currently my setup isnt TOO loud, however I was thinking about adding headers and trying to quiet it down quite a bit if possible. I wonder if its really possibly to have a semi-quiet setup running SPT exhaust, stock cats, stock midpipe, and headers? Hmm.

[Reason]

Of course it will be quiet, thats the reason why I got rid of the SPT back when I did. Go with a UEL header (wrapped) stock cats, custom mid pipe with a long resonator (stock size piping) and SPT axle back.

[d1giPhux]

Yeah, thats about what I'm shooting for. How much louder you think the headers will make the exhaust system? I think with the added headers + resonator it should be okay. I wonder if running 2 resonators would make it even quieter.. or not?

[Reason]

The resonator will eliminate any rasp and give the exhaust a deeper note. You wont hear a sound increase from headers. Try to find a sound clip of 4-2-3-1's set up. Even though it's only a 2.2 he had the uel header stock cats and mid pipe and SPT exhaust, and it was quiet like stock almost.

[d1giPhux]

I cant find his page for the life of me. Dammit.. search doesn't like short terms!

[Reason]

http://www.youtube.com/watch?v=HaqMtblfdmQ

viewtopic.php?f=6&t=13331&start=150 (https://sl-i.net/FORUM/viewtopic.php?f=6&t=13331&start=150)

[d1giPhux]

Nice! Thank you.. damn i was having a hell of a time trying to find his threads!

[d1giPhux]

Anyone know the difference between spiral louvered designs, and perforated core design resonators? Some people say spiral louvered make the airflow more turbulent.. however they are supposedly more quiet. I wonder how much 'performance' decrease there is? Thanks.

[Reason]

I'llget that sound clip in a few minutes, but you will have to wait till tonight for me to upload it.

[d1giPhux]

Aight.. thats cool! def not a prob! Right now im deciding whether i should just hurry up and order a 409SS pipe w/2 spiral louvered resonators on it from muffler express in Toronto, or if i should just have them send me a 'straight pipe' and then buy 2 'better' resonators and have them welded on by a local shop. What you all think?

[Reason]

I'llget that sound clip in a few minutes, but you will have to wait till tonight for me to upload it.

This isnt going to happen, I have a damn exhaust leak....

[d1giPhux]

Oh shite!.. welcome to the club! :lol:

[Reason]

I hate this club, I pride myself on having a dirty sounding exhaust with no leaks.

[d1giPhux]

Yeah this club sucks.. and I seem to join it about every 3-4 years or so after some good ol' new england salted roads! :lol:

[Reason]

I hit something and cracked my first cat.

[d1giPhux]

ouch. if you needa get some cheap cats.. check out mufflerexpress on ebay. they sell quality cats for cheap. or you could go with magnaflow OEM spec for more.

i still cant decide if i wanna go with spiral louvered or resonated core resonators on my pipe. I can get the spiral louvered resonators from muffler express directly welded onto a new mandrel bent 409SS pipe, or i could get a 409SS pipe from them, then have some perforated core resonators welded on locally. What to do.. what to do.

[Reason]

Unless you aren't willing to have your glasspack changed every year or two dont get a glass pack.

[d1giPhux]

What type of glasspack are you talking here? I think all of these use AROUND the same type of technology.. maybe with some of them NOT having packing at all. Not sure what I should go with for longevity.

[Reason]

Well vs. the one that you want packed with stainless steel.

[nclegacy]

Anyone know how a stock setup would sound without the resonator? My midpipe has a leak right where the hanger is, and the local muffler shop proposed cutting out the section between the 2nd cat to just before the axle and replacing it with straight pipe.

[d1giPhux]

It would sound like crap. Super loud.. and super drone on highways. Don't do it.. i think it sounds like garbage. It will be SUPER loud. Why cant you just get them to weld in a glass pack? They are good sounding, and wont run you more then $30 or so. I would MOST DEFINITELY do that.. unless you like driving yourself insane with highway drone.

[Reason]

Removing that one small resonator shouldnt make much of a difference at all.

[d1giPhux]

Not much.. but i guarantee you will notice it. Especially at WOT. The drone is gonna kill you..

[Reason]

That stock resonator is so small I wouldnt be surprised if it didn't do anything. I think it may get rid of the rasp in the exhaust that these cars have.