brillo

I'm considering designing a custom light weight single exhaust system that will dump down just like the RB model. I'm not interested in bling, I just want the system as light as possible with good flow and a sound that is not obnoxious.

I did a little searching but didn't find any threads, although I swear TeamRX8 or someone did install a similar install.

any ideas? anyone know of a good titanium muffler? I can't seem to find a universal on on the net.

Imp

https://www.rx8club.com/showthread.p...hlight=muffler

McCalll

Here is what Mark (TeamRX8) is using:

http://www.burnsstainless.com/Ultral...temuffler.html

https://www.rx8club.com/showpost.php...3&postcount=47 - pictures of his install.

I'm contemplating buying two of the 12" Burns units and replacing the two heavy (~12lbs) GReddy mufflers in my current cat-back. The reason I want to stay with a dual muffler set-up is strickly for sound purposes since I'm running a hi-flow cat/mid-pipe. With a stock cat in BS you can easily get away with a single muffler set-up but I'm afraid a single muffler in STU trim will just be to loud to live with everyday. Of course that's another $450 investment into my already spent $500 cat-back. I'm almost at titainum territory here...

Now if I go for this crazy idea I need to find someone in the DFW area that can weld stainless.

John V

iTrader: (1)

That's what we did. It has worked out great for the couple years we've had it.

brillo

sound is now my biggest concern, as this is my primary driving car and I don't want a nasty drone at cruise. I was thinking maybe run two exhausts in parallel? would that hurt the flow? or would a resonator + exhaust quiet it down? I'd rather have no sound like the stock exhaust than a nasty one.

John V

iTrader: (1)

I don't notice any droning with the ULLLOSE exhaust, but it does seem that it's gotten louder since we installed it originally. I suspect the Borla doesn't have the expensive stainless steel packing, and so it's probably muffling purely because of the volume in the chamber of the muffler.

TeamRX8

iTrader: (25)

it's the same as the Burns Stainless muffler except that Coast's pricing tends to be a bit more, the best pricing is available from Pegasus Racing

be advised that these racing mufflers knock off the rasp, but are not all that quiet, the larger the diameter the louder they will be

make sure you get the stainless steel packing too, the ceramic will burn out almost immediately

they also require a slipover on the exit, you cannot weld the discharge tube directly to the muffler

clyde

there are a couple situations with a drone. Light steady throttle at ~3k (in steady state cruise in 6th gear) , but beyond a couple rare things like that which are easy to avoid, it's not bad at all. And even when it's bad, it's not bad.

ULLLOSE

iTrader: (1)

The Borla XR-1 does have the the stainless packing but I think over time even it will break down. Last year my car never hit over 89.6db in San Diego, yesterday I was 91.2db. I do not think of it as loud and I notice no droning. Before I built mine I had a chance to drive another RX8 with the TriPoint T3 system, strait 3" pipe then they added a 12" long Borla XR-1, it seemed very loud and would hit 93-95db.

As far as weight the 16" Borla I use only weighs about 8 lbs. Before I built it I did talk to the Burns guys but they did not think I would be able to stay under our 93db limit with the Burns muffler. I would guess a dual setup would get it done but they are expensive and if you put two on you save no weight. Also because of the way they are built, they come apart so you can repack them, it limits how you can install them.

mp5

Don't know about you, but when I was working in the trailer it seemed we were getting more DB meter calls on the radio that normal. Could be that the meter placement and/or conditions caused the higher reading.

TeamRX8

iTrader: (25)

the Borla has thin stranded stainless steel wool, which is not the same thing as the heavier stainless steel scrubble used in some racing mufflers; which is essentally curley-cue fines from lathe machining that won't wilt and matt out like wool will ...



the Burns-type muffler being repackable doesn't limit how it's installed, you just drop the muffler and whatever tailpipe piece is on it, then disassemble

I'm pretty sure my previous Stock setup with Burns muffler would pass the San Diego sound meter, that's without playing games like an elbow to adjust the outlet away from the sound station

ULLLOSE

iTrader: (1)

We had none in the group I worked for.... But it could have been a meter issue. Or maybe you were just trying to get my times tossed out.

mp5

You did that yourself by wussing out of the 1st run group and running X.

To keep the thread on topic... I'd say the ULLLOSE exhaust is pretty loud at full song. You definitely know when he's on course, but it's bearable for normal street driving. I'm thinking about doing something similar once the car budget recovers from my recent tire purchase.

gh0st

i visited an local exaust place today to get a quote.

if i bring in my own canister, a 3 inch 2 piece pipe with custom flanges and hangers will only cost me about 250-300+ the cost of my canister.

the meterial they were using was 14 gauge aluminized steel. would that be stong enouph to take on the heat of a rotary + turbo (hopfully soon)?