ShIvER[PT]

I know that the RB turbo back system is the **** !!
but it's a kit.. I believe that one can build a better custom system.
what if I get full piping from the turbo outlet to the rear muffler (yep, straight) using 3 and an half inches piping ( the exhaust shop doesn't have 3").
what would be the best muffler ? I don't really care much about the noise, but I don't like fart pipes very much :\
to my limited knowledge the best I could get would be an Apex'i GT spec exhaust?
or maybe that HKS titanium one..

am I correct ? or the rb ones are the best ? or someother muffler that I don't know?
oh and don't tell me a straight pipe to the back would be the best cause I know that :P

thx in advance

d0 Luck

RB = overrated

ShIvER[PT]

I also think that.. that is the reason I posted this thread

SureShot

In your case a long bomb muffler will give you a nice tone with no restriction.
A short bomb will be anoyingly loud.

That big pipe will cool the exhaust enough so fiberglass packing will work OK near the back.

ShIvER[PT]

let me digest that english (not bad english level there, just bad reader here! )

bomb is the muffler right ? that wide part?
http://www.apexi-usa.com/exhausts_gtspec.asp
can't really see if it is long or not on that angle..

"That big pipe will cool the exhaust enough so fiberglass will work OK near the back" the big pipe is the muffler itself?
forgive me.. but to add to my mix of not to good english, and not knowing much about cars.. is bad mix

d0 Luck

yup sureshot's right on the track. a long bomb/truck glasspack will work. but will burn up... lol

i'll be using 2 in the near future coupled up w/ 2 glasspacks again @ the rear... sooo.. 2 glasspacks per exhuast port..

ShIvER[PT]

I should have put on the title: "really basic english level user here"

.ok so my question remains. is the Gt spec good/the best ? does it .. spread the heat allright so the bumper doesn't melt ?

SureShot

I should explain, a bomb muffler is a straight through fiberglass packed muffler.

The origonals back in the '60s were painted red and were called cherry bombs.

I have used them for years on the back of rotary engine exhaust systems.
They do well unless you have modifications that push you power above ~250 RWHP.

ShIvER[PT]

http://auto.howstuffworks.com/muffler5.htm
how stuff works is ur friend

"In your case a long bomb muffler will give you a nice tone with no restriction.
A short bomb will be anoyingly loud."

so longer muffler equals less noise?
how does the Apexi Gt Spec rates there? in example, comparing to the N1 that is said to be REALLY loud?

"That big pipe will cool the exhaust enough so fiberglass packing will work OK near the back."
ur talking about the pipe that goes all the way from the turbo to the muffler right?

"yup sureshot's right on the track. a long bomb/truck glasspack will work. but will burn up... lol"
now Im starting to understand.. (I think) these mufflers don't like heat that much.. BUT since I have a big pipe coming from the front of the car it might be OK .. is that it ??
so, I guess that's one of the uses for a pre-silencer..

"but will burn up... lol"
so what do I do ?.. put two of them ? must have a presilencer?
(or didn't I understand it right?)

thx for the help till now

REFLUX

if you want to go for a more "domestic" look (IMO it's something diff & very clean), I remember reading about one user who used 1 Magnaflow muffler where the presilencer would go (midpipe area) and he achieved a real nice sound

used 3" piping all the way I believe

muffler similar to this one
http://www.magnaflow.com/02product/m...fs/4x9oo14.jpg

slidingsky

Please take my advice. Use as many mufflers as possible. Ive tried everything.
diffrent set ups Ive made on my cars.
NA 20B:
3" all the way back, 2 domestic one after another Total 2x3"
4" to dual 3", one 3" dom on each pipe Total 2x3"
4" muffer to dual 3" with one 3" on each pipe. Total 1x4" 2x3"
4" pipe with 2 mufflers after another, to dual 3" pipes with mufflers on each Total 2x4" 2x3"

So on that car more is better. Its still damn loud concidering there are 4 mufflers. The bigger pipe makes the car sound farty unless you put mufflers in the right places. Going to the 4" pipe made me realize this.

My 2 cents, from exp. Use as many mufflers in serise as possible. Japanese cans are ok cuz they are easy to fit in the back of the car, but dont do crap to quiet the car down.
Id recommend split-flows from summitracing. I dont remember what brand, but you can find out. They are stain-less packed and are fairly compact.

All my expecience is on an NA though. When I get the turbo set up fabed it should get quieter. BUT I wouldnt count on them as replacement for a muffler.

Good luck.

ShIvER[PT]

but I was thinking about the turbo.. I think it's REALLY much more quiet than the N/A engine. and plus, U tested that on a 20b, thats 3 rotors right ? really loud I bet.

"So on that car more is better."
how is that? I mean, more mufflers = more weight and more resistance. right?

"if you want to go for a more "domestic" look (IMO it's something diff & very clean), I remember reading about one user who used 1 Magnaflow muffler where the presilencer would go (midpipe area) and he achieved a real nice sound

used 3" piping all the way I believe"

what do U mean with "domestic" look.
did that user put a muffler that was suposed to be in the back working as a pre-silencer?

one more question.. if I put two mufflers the sound the exhaust emmits will reduce, right ?

85rotarypower

My best advise is to use a the largest magnaflow you can get your hands on plus a N1 style muffler. Its loud, but on my 12A, it gave the car a VERY low tone and there was NO tinny sound to be heard. It was just a very controlled sound.

ShIvER[PT]

magnaflow pre-silencer or use a muffler as a pre-silencer ?
I wonder if I can get magnaflow here in Portugal..

ShIvER[PT]

forget that last post!!

U mean one like this here :

http://www.magnaflow.com/02product/parts/12641.jpg

or maybe like this one cause it's straight:

http://www.magnaflow.com/02product/parts/12649.jpg

85rotarypower

Nope, one of magnaflows stainless mufflers. I have this one here: http://www.magnaflow.com/02product/parts/14258.jpg
You could use this one though: http://www.magnaflow.com/02product/parts/14263.jpg

I put mine just off the exhaust manifold. It will be just off the manifold when that goes on though. And they are all stainless steel construction so its going to handle the heat and won't rust out.

ShIvER[PT]

must be 3"

so stainless steel it is.. so it handles the heat right?

SureShot

Some of the above posts about pre-silencers are refering to N/A engines.
As you already suspect, the turbocharger's turbine performs the function of a pre-silencer.

I think a 3 inch glass pack about 20-30 inches long is what you want.

ShIvER[PT]

that's HUGE!! :\
I think the n1 or even the gt spec from apex'i aren't that long... that's why they are fart cans
they don't even have the size of the mufflers on their site.. their site sucks ***

anyone knows the size of the Gt Spec muffler ?

slidingsky

Id didnt think my 13bt was very quiet running 3" pipe. THe turbo wont shut it up when the gates open. I dont know what sound your looking for. I hate that bassy sound to me thats as bad a ratty system. The bass gets old quick.
So do what you want. And no the 20b isnt louder uncapped than my 13b. just sounds cooler. Use the mufflers as pre silencers.
Im using 3" with 2 dom muffler and an HKS can on the end. Its freakin quiet for an NA. The mufflers keep the idle quiet and up high. Up high the car doesnt scream. Weight for a streetablity. If you really care dont use mufflers at all. Then youll be HARDCORE!

ShIvER[PT]

well... the car here I drive now has no mufflers!! the cops love me
lucky for them it's a 1.2liter opel

oztofrdm

the straight muffler is going to be louder than an offset muffler because the offset one is making a S inside(but have a little bit more backpressure). the less back pressure, the louder the car is going to get, but hopefully the turbo will muffle some noise out a little. just slap on a huge turbo so all you can hear is a loud Wistle

YearsOfDecay

Racing Beat are the best mufflers for those of us without fabrication skills who want a kixk *** friggin aexhaust system that bolts right up to the factory locations, sounds good, looks awesome and is cost effective. They always bolted up to stock, but the old RSR cans SUCKED. looked like ***... THeir NEW style is a friggin thing of beauty.

NOW THEN.. for those of use with welding and fabrication skills... Here is MY favorite combo...

Get a Racing Beat Y pipe two exhaust gaskets and two exhaust flanges from racing beat. This is gonna cost more than the mufflers, but you can use a regular Y pipe and just slip fit the exhaust to save more money, but that can make replacement when the glass packs blow out a real bitch)

THEN get the long style Cherry Bomb with the 3" outlet on one end and an angled 2 1/2 end on the other and a polished exhaust tip for the 3" end, any style you like, and six rubber smilies to replace the stock rubber doughnuts. Its been a while since i did this, so i can't remember what size cherrybomb is quite right, but you want it to be close to the length of the stock muffler from tip to where the bend is going towards the y pipe

Now put the car on a lift and hold the cherry bomb in the position you want it.. holding the cherry bomb in place with a Tee-Pee stand and Making sure that the angled inlet is pointed right at the flange on the "Y" Pipe. then you take your exhaust flange, bolt it to the y-pipe and make yourself a connector pipe out of 2.5 inch pips stock from wherever... just make sure that you get ones with the right expanded side to fit the muffler. you cut the pipe to length and put the end inside the flange.

Once everything is mocked up, you can tack weld everything together.


Mount the cherry bomb by welding hanger rods onto it so that they fit to the stock locations. (you first have to make three rods per cherry bomb with 180's on the end to go through the rubber smilies). I just hook the rods through the smilies, then cut them at the right length, bend a right angle to lay along the muffler and then tack them to the cherrybomb.

Once everything is tacked and looks good, pull it down and weld everything together.... done..

Now you have a set of cool *** sounding mufflers that cost you about 60 bucks to make.. and when they blow out, which they will, you can make another set for 60 bucks cause you've got a Stainless Y pipe that isn't going to rot out.

Personally, I said to hell with all that screwing around with the welder and just bought a set of racing beat turbo cans... not as loud, but definately easire and the bling factor is +10!!!!