+1 thats the muffler i'm running

 

David - Does it matter if I do it the other way round and put the bullet in the back and a magnaflow in the cat? I already have a bullet rear.

Or would I do just as well with another bullet in the cat. I want to make it quiter but I don't want too loose more than a couple hp if possible.

Thanks

 

Thanks for the input! If it was still not quiet enough for you then even more likely it wont be for me with the bullet+magnaflow combo.

 

All the parts are exactly where they are as you see in the pictures. I havent installed them yet but I will this Sunday.

Thats way too big and it wont fit with my setup with out further modifications in which I dont want to do. I want to keep it so if later I can purchase another buschur muffler or rear section to just bolt on. With that muffler I would need to modifiy the midpipe as well.

I'm not too sure about magnaflow mufflers. The Vibrant will be the primary main culporate that will be quieting the exhaust. Magnaflows have always disappointed me in there ablity to quiet exhausts down. I wont put a magnaflow as my primary muffler because from past experiences they have done a poor job muffling compared to some other choices out there.

When you say your exhaust sounded perfect, would someone actually confuse your car with a 100% bone stock evo? I'm not after a good sounding system, I'm after a no sounding system or close to it.

 

just to share my experience, i have a buschur slip-fit TBE with cat delete center pipe/scca legal muffler. sounds excellent on a stock frame turbo/cast type manifold.

when switching to a gt35r/tubular manifold, the tubularness lol made it drone. so this is what i did:

kept my buschur heat-wrapped DP, got an Apexi Noir Exhaust, and used a Hahn racecraft 3" cat i had laying around from the DSM days.

i had a shop hog out the hardened steel flange on the DP to 3" (the dude had to work through lunch lol), cut the flange off of the cat for slip fit and mated the other side to the noir. it sounded *beautiful looked stocker than hell BUT still had the noir neckdown from hell. also the SCCA legal muffler/center section can be *easily put back on.

http://www.youtube.com/watch?v=cVsjff6oT9k
too bad the wastegate dump drowns it out lol/but not that much.

later on, i just deleted the noir center pipe and made a "cat pipe" with a 24" 3"ID resonator (louvered/facing the right way/i know, but its all they had) and the hahn cat. had the thing jigged on my evo with the noir muffler and BR DP. talk about quiet lol. i think this is the BEST stealth/quiet solution IMO. if you don't use a resonator with the noir muffler though, the exhaust note sucks/might have to do with the noir muffler being 80MM in/out straight through. the two work hand in hand and create a subtle tuned exhaust note with decently minimal restriction.

i wish i could dyno/compare this setup with the staright BR SCCA Muffler/center pipe setup.

 

Update:

Tomorrow is the big install day. I will also be adding an o2 housing to my setup. Its the PPI swain coated megan o2 housing.

I'm not sure how much o2 housings affect exhaust sounds, but I'm still keeping the same quiet target level.

Update copied from first page:

PPI Swain coated Megan o2 housing




Also my friend is a Mechanic for Ford/Subaru/Mazda so he was able to get me some OEM gaskets for the o2 housing. Since the Buschur downpipe flange is a flat surface and donut gaskets cant be used, I will probably use either the middle or the right gasket. We're thinking of probably using the middle copper gasket.

 

The Magnaflow won't fit where the cat goes.

 

I didnt know that, thanks for the info!

 

Hi folks - I'm relative new in this forum and so fare I'm in the "reading all treads mode" to finde the golden onse.

This tread is one that i will follow, as I have build sevel exhorst system my self - not for my Evo but for my Rotrex SC Honda Accord TypeR.

As you do I perfere a silent exhorst and the simpel reason is the fact that most race track over here now are so damm restricted that the only allow the max of 95 Dba on a flybye. And our car tax is higher that you can imagin so my Evo is also a fammily and buissines car .

Well Back to the subject.
All my expierence is in a match whit your's. A widebody is more silent than a round - The placement is werry important,only a few inch movement of a mufler can make a big different in the noise.

So fare I have installed a 3" HKS silent highflow catback ( purchased as a Catback ) modified by inserting a "testpipe" + 3" downpipe.

When runnig the HKS catback ( keeping the stock cat and downpipe ) it was actualy reducing the noise 2-3 DBa messured in a angel of 45 degres and 1 meter distance from the end of the exhorst system.

I will go to DBa messure the now installed system soon.

To give this tread more value if would be nice to have some compare able DBa messuring don.

GiGas

 

I dont have a DBA measuring system. But I'll see if I can get a cheap one or someone that has one already.

I didnt know that muffler placement location would make a big difference on the exhaust note. Thanks for the info.

Well here are the updates.


Pics were taken with my friends cell phone. So there are not the best quality but they arent bad either.

The tip compared to the bumper. But as the exhaust warms up it sticks out a little bit more. It should keep the bumper cleaner :-D


Side under shot


Back from bottom angle.


Midpipe Muffler connection.


Side view from under.


Bullet Muffler in the center.


Well where shall I begin. This exhaust system is actually a little different i comparison to what I have ran previously because I have an o2 housing now. My friend forgot the gaskets at his house, so we ended up re-using a 2.5 inch gasket from the stock exhaust that I made using Percy's Carbon gasket sheets. Its holding up for now, maybe in the future I might change it to the above gaskets.

Sound:
The Buschur Bullet+Vibrant+o2 housing combination seems to be the same loudness as the cobb exhaust+stock o2 housing. Inside the cabin the idle is pretty much close to stock. Normal driving you can hear the exhaust in a form of a very mellow deep tone. On the highway there arent any drones, and the exhaust note is very low key and on the stock stereo I was able to enjoy the music at a volume level set to 23.

I was aming for a stock exhaust sound, but it cant really be mistaken for stock. Whats interesting though is if you stand in front of the car you would think its stock. But if you walk behind and stand near the exhaust tip, the deep tone kind of gives it away that its not stock. I need to give it some more mileage in order for the exhaust to "break in" especially the sound deadening material in the mufflers. Some times exhausts might get slightly louder after it sets in or it might get quieter...

During WOT the exhaust is not that loud but can be heard insid the cabin. I can also hear the turbo sucking in the air to give you an idea that its not that loud. I dont know how it sounds as a fly-by or outside POV but I'll get to that in the near future.

The V band clamp flanges are a beautiful thing to have. Everything ligned up with no worries of having sealing issues or bad gaskets. I did however end up cutting out the heatshield for the stock catalytic converter location. I wasnt thinking and didnt realize the Bullet muffler is designed at a very slight angle that if I turned it I would have gained more clearance. Oh well, now I have even more clearance.

I will get some sound clips in a week or so. Hopefully it will capture the exact sound note and loudness.

I'm a little tired right now. If you guys have any questions or if there is something I missed that you guys want more info on, let me know and I'll update with the answers.

PS
I had to adjust my Perrin MBC because with the free flowing system I started boosting 23 psi and held around that much to 6k when I hit fuel cut. I'm going to lower it back to 20 psi since I'm on stock tune right now and no wideband. Next week end I'll put on my Greddy Profec B Spec II.

 

Exhaust looks real good. Can't wait to see a video and hear what it sounds like.

 

nice set-up.

 

I can tell already that BluEVOIX is a little upset/peeved with the volume. It's come to the point where we may have to accept that a quiet, full 3", straight through, catless tbe on the CT9A is unobtainable. I may have to go with the an offset muffler in the rear or a QTP downpipe.

BluEVOIX, thanks for all the hard work, money, and time invested.

 

Thanks,

Well the thing is I really wanted it to be close to exactly as stock. But it came out to be similar to the Cobb, which is liveable. Mind you that I am with an o2 housing now as apposed to my previous setups.

I'm going to try and make a video/sound clip soon. Maybe this week end and hopefully weather permitting.

 

Looks good man. I ended up picking up a lightly used buschur magnaflow axle-back section since you posted this and should have it installed this week. Coupled with my bullet testpipe, I have high hopes of a quieter interior. I've also been looking into cheap (and not cheap) sound deadening material to line the trunk and under the rear seat with; not sure if I'm for sure doing this yet or not.

IMHO, skip that EBC you're talking about putting in. Get a gm bcs, evo X map sensor, and control boost with the stock ecu. It's so much more of a clean install, complete with error compensation and everything. While you're at it, get a LC-1 wired in to your ecu and get rid of that stock tune! You'll be surprised how much faster the car will be tuned to 11:1, boost doing 24 tapering to 22 or 23, and with tweaked timing and mivec maps. Oh, and of course, raising that boost limit (i.e. fuel cut) table