What To Get ?

[nafan]

I OWN A RB25DE AND I JUS GOT A CANNON MUFFLER WHICH IS 5INCH WHICH CAME WITH A SILENCER.

I LOVE HOW IT LOOKS BUT FOR SURE ITS GOING TO BE TOO LOUD JUS WELDED ON THE END.

I WANT TO GO FOR A SYSTEM EXHAUST WITH THAT WELDED ON IT, BUT THE THING IS WHEN

IT COMES TO AN EXHAUST I DONT HAVE A CLUE ON WHAT A CAT-BACK OR RESONATOR MEANS LOL.

SO ANY 1 WITH ANSWERS ON WAT TO INCLUDE IN AN EXHAUST SYSTEM WHICH WOULD

MAKE MY MUFFLER

SOUND NICE AND NOT TO LOUD PLEASEEEE HELPP

Edited December 18, 2008 by nafan

[_bobo_]

hi flow cat, 2.25-2.5 inch piping, 1 hotdog resonator, plus cannon. should be alright and shouldnt drone too much. *you can always ask for another resonator to help quieten it down i guess

[Vik]

Firstly, lay off the caps lock so people will take you seriously.

Just a lil bit of .. lets say .. "forum etiquette"

And as above.. but dont you think that 5inch is a tad too big Nathan ?

Have fun!

MRXTCZ

[N-DAWG]

If you're just after the looks and sound, then just get a canon stuck on the end. You'll see pretty much no gain except in the amount of attention you get.

To do it properly:

2.5" exhaust piping from the cat back. The cat is near the front end of the car after the extractors and filters out emissions. From there to the back rear tail pipe/muffler is commonly known as the cat-back. 2.25" is the smallest you would want to go and will give you more response but lose in the top end. 3" is generally a bit big for an N/A Skyline due to volumetric efficiency (the ability for the exhaust gases to fill the piping). Mind you there will be more top end power to be gained with a 3" catback, but you will lose down in the low end unless you're revving the car out a lot between every gear change. 2.5" is going to be the best all round for you.

Cost will vary between Mandrel bend and press bent (mandrel bend retains the pipe diameter, press bend crushes the pipe).

A resonator helps to muffle the noise and prevent the common droning sound. They also help bring the car in line with EPA sound levels. A loud exhaust is fun at first, then it becomes an annoyance and attracts too much wrong attention.

My advice would be to go down to your local reputable exhaust shop (if you give us a location plenty of people here should be able to steer you in the right direction) and discuss with them your needs.

Meanwhile, this topic has been covered countless times! Do a search and you shall find.

Like you said you don't have much idea about exhaust systems. Here's a few links to get you started:

http://news.carjunky.com/how_stuff_works/t...rks_ac381.shtml

http://auto.howstuffworks.com/car-exhaust-...ons-channel.htm

http://auto.howstuffworks.com/question172.htm

http://www.mondaymorningmechanic.com/exhaust-system.jpg

http://auto.howstuffworks.com/question172.htm

Once you understand the components in that 4th link and what each components function is...then things like exhaust efficiency, catback and other terms will make more sense.

I do suggest using forum search, or even just looking at page 3 of the topics in this N/A section...the Exhaust topic was done to pieces back then

[Eug]

well put N-DAWG.

have a look around nafan, check out some of the links that N-DAWG put up and give yourself a crash course in exhausts. there was an extensive thread done not so long ago so have a look in there and only after you have read that and still have questions - go post up.

cheers

[_bobo_]

yeah i first had a thread with the same question.,.turned out to be very helpful. do a search you'll find heaps.

my n/a got ......extractors, hi flo cat, 2.5inch piping, 1 resonator, cannon on the end. Sounds ne and tuff and doesnt drone all that much except at certain revs when it holds. otherwise i can barely hear it, unless i step on it. I got my setup done at dandy exhausts if your in south eastern suburbs of melbourne. goodluck

[GTS4WD]

PARDON!?

Edited December 19, 2008 by GTS4WD

[nafan]

yeah i first had a thread with the same question.,.turned out to be very helpful. do a search you'll find heaps.

my n/a got ......extractors, hi flo cat, 2.5inch piping, 1 resonator, cannon on the end. Sounds ne and tuff and doesnt drone all that much except at certain revs when it holds. otherwise i can barely hear it, unless i step on it. I got my setup done at dandy exhausts if your in south eastern suburbs of melbourne. goodluck

Yo where abouts in dandy is it, do you know the name of the shop

[rr33]

sorry to hijack but how would a 2.5" system go on a rb25de+t?

[N-DAWG]

2.5" might be a bit restrictive on a de+t. iirc, Dan used the stock exhaust before later upgrading to 2.75" with good results. 3" would be better as there will be enough air flow to fill the exhaust piping, and of course you want to get the exhaust out of the turbo as quick as possible. I have read somewhere (can't remember if it was on SAU) where someone was getting a bit of compressor surge with the stock piping, which disappeared after upgrading the exhaust. There could be a number of variables causing that though.

Why would you be wanting to use a 2.5"? Is it just a question of how it would go, or have you got a 2.5" exhaust system now with a view to turbo? Or looking at upgrading exhaust now but have it useable afterwards with a turbo?

You probably shouldn't have too much trouble selling a good 2.5" catback later on to other N/A skyline owners if it's for that reason, though you'd be best to upgrade closer to a 3" to begin with whilst doing the de+t conversion.

[rr33]

yep the reason is I want some good peformance now with the na and in the future if I do decide do do the +T I want an exhaust that would still be usable.

[N-DAWG]

In that case 2.75" is probably going to be the best compromise between the two. To be honest though, you would probably be better off going with 2.5" now, and if you do turbocharge later sell that exhaust and upgrade later on, which shouldn't be too hard with the number of R33 N/A's coming on the scene.

Don't forget the aftermarket front and dump pipes generally suit 3" or greater as well, so at least your exhaust system will be more consistent going 3" later on with the turbo, not to mention bolt on for the most part too if you use a second hand jap exhaust.

How long are you looking before doing the turbo? If it's only going to be 6-12months then just hang in there with the stock system. If it's not going to be for a couple of years or so, then if it was me, 2.5" and sell and upgrade to 3" later. That's my opinion.