With RB dual outlet header - into glasspacks as pre-silencers and then into racing beat mufflers?

 

Describing noise levels is very subjective and almost impossible. But the word "loud" comes to mind when I think of a rotary and any type of header.

 

loud, like annoyingly loud in the car, and if you go above 5k rpm people MILES away will know you are coming

here is a clip of my car with various catbacks on my header/presilencer setup

89 gxl

http://zeffy.novus-logic.com/media/exhausttest.mp3

right click/save as

 

Glass pack presilencers will NOT stand up to the heat & shock waves of the NA rotary. The presilencer (resonator) must be all steel. You can get away with glass packs on the end, where it's cooler. My bombs have been on a year, and are just now starting to give out.

 

hey Xentrix

what the hell is up with that first exhaust set up???


but the last one I really like. What kind of set up is that??

 

I think the first one didn't have the pre-silencer because that's how mine sounded like before. the second one has a pre-silencer added. now i wonder what the third one is setup with.

 

My car quiets down at higher RPMs, I have on the stock header=>precat, then midpipe, and catback, but its louder in the mid-range. Precats clogged?


edit: My car sounds like the 3rd one till about 5000-6000rpm then it quiets down and slows down.

 

my car get loud at 4K and then quiets till about 6K then slowly starts to get loud again.. it gets quiet because of the fuel i think... at 4K the secondaries come on

 

My car is quiet and deep till 4k then people down the street know I'm coming!!!!

kleach

 

hedder and dual 2" with steel resonators and straight thru mufflers=really loud, a few miles away loud

 

You ever heard of a sonic boom from the airplane flying overhead?
Just imagine that going on constantly when you drive.

 

mine isnt that loud but then again i have a turbo. 3"DP ---> 3" GP (Straight Through) --> Single N1 Exhaust

 

lol

 

Xentrix, what are your setups for that sound file you supplied? It's great to hear a sample of what to expect but i think we all would like to know which setup will give you which particular result.

 

laughing at who?

 

pd_day

 

Haha, I am not joking...
The glass packs will melt within 5 blocks, then the mufflers without presilencer will drone like crazy...

 

I had the exhaust installed and NONE of those soundclips are even close. It's actually pretty quiet. My mufflers aren't straight through, I'm not sure what they are, maybe Dynomax...I decided not to put the RB ones on, I'll save those for a rainy day...

 

Oh yeah, the presilencers we used were some type of resonator packed with steel wool and lava rock. The pipe is straight through in the resonator, but the interior of the pipe is perforated with raised dimples like a cheesegrader would have...

Anyway it sounds good and is actually quieter on the freeway at even throttle (not accelerating) than my downpipe/presilencer combo...

 

oooo,
My exhaust is loud with no presilencer, and glass packs.
Dude you don't know the meaning of loud exhaust until you have to disconect your cat to start the car and run it to see how bad the cat is clogged. I got aprox.150ft. down the road from my house and I had a throbbing head ache. I turned back at aprox. 250ft. because I didn't feel like driving a car that loud. I couldn't even consentrate on the road. This car had from precat back removed. It sounded awsome though. Something to really be proud of.
Charles

 

Dude that wont be too loud im running a single setup nextweek and i think mine will be a little louder than your setup hehe just make sure you dont get cherry bombs get some kind of metal silencer and not fiberglass

 

It's on, and it sounds ****. They are 14" presilencers, packed with steel wool...Everyone wants to be me in my neighborhood I'm sure...