Cool. Not too sure whether or not the o2 housing raises the volume too much. I think its more the size of the piping and dimensions of the mufflers that follow. It just sucks that we don't have more space under these cars. Then the solution would be simple.


Good info. But the ebc install can be clean when done right and is probably a little easier to setup than the factory boost control. Also, how do you wire the LC-1 to your ECU? I didn't know that was possible.

 

Search the ecuflash section. If you cannot find it, let me know.

mrfred's direct boost mod using gm bcs and evo x map sensor is far superior to any EBC on the market, I guarantee it. It's not even that hard to setup.

mrfred made another post 'how to log wideband w/o serial cable' that too, is pretty straight forward and works awesome.

Side note: lots of people don't know all the awesome stuff you can do with the stock ecu. Don't fret, just spend some time in the ecuflash section. It'll soon be your new fav spot on this board, I promise

 

I just found an exhaust leak under the car. Its right at the downpipe to bullet muffler attachment. I started to notice a little bit of rumble under the seat and some of that raspiness noise comming from the the middle of the car. So I took a quick look under the car and saw a little bit of smoke come out of that connection point.

I'm going to try and fix it tonight and see if there are any changes. I'm not sure when the leak developed but I'll report back if any changes come about.

 

Maybe setup was the wrong word to use. Tuning all the boost parameters was what I was referring to. Also, don't worry about me too much, I've been probing the EcuFlash forum since early '07. I admit I haven't poked around in there lately so I was totally unaware that the LC-1 could be wired to the stock ECU.

BluEVOIX, you didn't modify or alter that connection where you have the leak, correct? It kinda sucks to have a leak on a brand new system. Does the v-band need to be a little tighter?

 

The only modification I did was at the rear. I think its just loose thats why its leaking. My friend was working on that part so maybe he didnt tighten it all the way

I'm going to attack it tonight.

 

Well I loosened that section and retighted last night. Today I drove to work and looked underneith and saw that its leaking from the pretty much all the flange connections. (->)

Downpipe->Bullet Muffler->Mid Pipe->Axle Back muffler

I'm going to try and loosen the connections and tighten them down one section at a time. As I tighten each section I'm going to tap on the clamp 180 degree apart sections to make sure the clamping force is put on evenly.

If this doesnt work I'll post back. Then I'll try and use Copper RTV gasket maker this Friday.

This sucks. I always have problems regarding exhaust leaks.

 

Interesting thread. I'd also like the elusive stock-like sound with good power. I currently have a Buschur TBE with a 3" Random Tech cat and the Maganaflow round muffler. Still too loud for me and puts me on edge whenever the police are around (louder than stock = ticket in VA). Not sure how much power I'd lose with a stock catback, but I think it'd be substantial with my Red turbo.

So the v-band connections are all leaking?

 

They were but I fixed them. I remember reading that I need to tap it around with a rubber mallet/hammer as I tighten. So I did that and used a little RTV copper gasket maker just for over kill and its all good now.

One thing I noticed is that I can hear the inside of the bullet muffler when I put my ear near it. I guess that the Bullet muffler is steel wool packed, which is good for the long run but muffles less from what I read.

The other night I was messing around adjusting the Greddy Profec B spec II until a cop came around. He coasted behind me for a while as I drove normally and then left. That should prove its police friendly since it was in Des Plaines IL which is a pretty not so cop friendly area but not as bad as Buffalo Grove.

I'm thinking of possibly adding more sound deadening material inside the car. I have a feeling Mitsubishi went cheap on us, especially the area over the catalytic converter location.

 

nice work man.

 

Thanks,


I finally found a video clip of the Buschur Magnaflow rear and Bullet muffler. Its a great videw showing incabind and out.

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

Well as always video clips are hard to tell how loud an exhaust is and what it sounds like exactly to the T. Judging by this video I think my exhaust is quieter but especially during WOT.


I did however add something to my car to make it even more quieter in cabin. I bought carpeting foam from home depot and covered my trunk floor and most of the side wall part. Also I have added some cushion under the rear seat. It has actually made a little noticeable difference in cabin. It made the in cabin exhaust sound a bit softer. I want to add some to the back part of the rear seat and as well as the floors.

I know about Dynamat and similar products, but no way I'm going to spend that much on that crap. I'd rather buy roof deadening material which is the same thing but 1/3 or less of the cost. But at this moment I dont want to stick anything on that later I cant easily remove besides scraping it off.

I havent forgotten about making the video clip. I'll get to it in the near future.

Also I dont like the way my rear tip is sitting which is not centered but a little closer to the right. It hasnt annoyed me yet, but I think I might somewho have to figure a way to adjust it in the future. But it was the best I could do since at that moment of fabbing I didnt realize the bullet muffler was not positioned correctly. (turning it changes the angle slightly for adjustment) And after being done I realized the situation I corrected the bullet muffler for a better seal and the tip was moved because of the angle difference of the midpipe. Oh well, for now.

 

FWIW I had a custom exhaust made a few months ago using the giant SS Magnaflow muffler (the one you don't like), a 24" SS perforated core resonator from RRE, plus a 14" long x 4" dia SS Magnaflow. Along with a 100 cell cat, its very very mellow. No drone whatsoever.

We'll see what happens after the packing settles in. I'm pretty picky and so far I am pretty impressed by the low sound level and sound quality.

 

Back in 07, I read that stupid long RRE Stealthback post on SocalEvo maybe 3 times. I heard the word "mellow" and term "almost as quiet as stock" used more than a handful of times. I ended up buying the exhaust and was blown away by how not so quiet it was. So when I hear people say it sounds mellow, I know it's LOUD!! Mellow sounds good on a I-5 or I-6 or V8. Not so much the case with a tiny displacement 4 banger.

Right now, 3" dp+ 3" tp + stock cat back = perfect for cruising. Unfortuantely, the stock cbe chokes the car a bit and I want a slightly more sport tuned volume when I'm out in the woods. I love how the 06 and up Gallardos have dumps that open up instantly at ~ 3500 rpm. Best of both worlds.

 

so would a 3" db, hiflow cat, and 3" magnaflow bullet muffler be alot louder than stock? i want to make some power but not alot of noise, or do i need dual mufflers?

How about a split pipe from the cat and put 2 mufflers and 2 out pipes for a nice dual exhaust look.

 

Having a cat (of any kind) makes a big difference. With that said, I'm not kidding when I say that my custom job is pretty quiet. Mellow, even. Only someone that lives in a world populated solely with Honda FCXs and GM EV1s would consider it loud.

 

Something interesting in which I thought about.

The downpipe rests very tightly on the tie bar. Its not to the point where it causes any dents to for or anything. But it is very snug on it while at the same time heat wrapped.

Do you guys think that this would cause added exhaust rumble noise/transfer exhaust sound inside the cabin? I'm going to add some washers to bring the tie bar down another half inch and see if full clearance will make a difference.

Also mayb this has something to do with it, but in colder temps the exhaust is a little louder inside cabin compared to warmer climates....