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Very Quick Exhaust Question....

WOG BOY

By WOG BOY,
in Engines & Forced Induction

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WOG BOY Community Regular

WOG BOY

Posted
Posted

lookin at gettin this zaust system....

noob to this exhaust stuff and limited knowledge of mechanics so plz dont go abusing me.....

this is a cat back exhaust system isnt it?

post-44636-1202963152_thumb.jpg

is the right upgrade on a 33 for better performance...dont need to go and get other parts for the zaust....? (like dump pipe and split this and that?)

let me know as u can see.....fairly knowledgless in this field!

any advice is welcome

Cheers

Matt

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moobaque Rising Star

moobaque

Posted
Posted

mate,

there will be some minor increase of power with a catback only exhaust but at the end of the day if a real power increase is what your after (and headroom for the future) the cat converter and the dump pipe are the weakest link in the standard exhaust.

if your just after a nicer note and some bling out the back then a cat back is fine.

Cheers

Camden

Swink33 Community Regular

Swink33

Posted
Posted

That does look like a cat back exhaust. Make sure it will actually fit your car. I would recommend getting a 3" split dump and front pipe aswell as a high flow cat. This will make a much more noticeable difference plus if you intend to do any more mods your gonna need to upgrade the whole exhaust not just the cat back

WOG BOY Community Regular

WOG BOY

Posted
  • Author
Posted

while im here and u can see my lack of knowledge in this area....

what does the split dump do? as well as the front pipe etc.....

may as well have these answered once and for all....

thanks

nizmo_freek Experienced

nizmo_freek

Posted
Posted (edited)

Thats a HKS Silent High Power catback exhaust, will fit your r33 perfect, i have one on my r33 gts25t, gave a decent gain but the biggest gain i got (after i had installed the catback) was replacing the cat converter with a decat pipe, which is illegal in aussie from what i know, so even just fitting a highflow cat should give you a decent gain to.

Edited by nizmo_freek
moobaque Rising Star

moobaque

Posted
Posted
while im here and u can see my lack of knowledge in this area....

what does the split dump do? as well as the front pipe etc.....

may as well have these answered once and for all....

thanks

basically its just a way of combining the exhaust gases from the engine and the turbo's wastegate with minimal turbulence (hence better flow). with the standard setup the gases just collide with each other. its exactly the same theory as putting extractors on a naturally aspirated car.

This isn't prolly a bad idea anyway but i had to purchase a new O2 sensor (its an oxygen sensor that screws into your dump pipe) as the after market split dump had the mounting hole lower than the stock item and the current 02 sensor lead was to short. Went and got me a brand spanking new NTK from Bursons for i think like $80 (maybe less?) and fixed the issue. (as well as the vehicle probably running more efficient as 02 senors get a little destroyed from years of exhaust gas)

Cheers

Camden

WOG BOY Community Regular

WOG BOY

Posted
  • Author
Posted
looks to me like the cat is already welded in the exhaust so really you have a dump back :whistling:

im assuming thats a good thing then......

can someone else plz confirm or deny if this looks/or definately already has a cat on it?

thanks for all the info so far people!

BLK33T Community Regular

BLK33T

Posted
Posted (edited)

Thats a JJR cat back exhaust ... the thing welded into the zorst is a small resonator <--- I know this cause I just had one put on plus split dump and Hi flow cat!!!

This item that you are looking at is a great fit ... mine runs about 10mm off the floor pan it does have quite close clearance to the hicas though which doesn't really matter :whistling:

I would recommend thought if you are buying it new to get yourself the JJR split dump pipe and high flow cat ...

The split dump pipe helps to rid your exhaust of turbulence around the back of the turbo which will allow the motor to flow more air and hence more power ... the split dump and cat will add more power with or without a cat back zorst.

You will need to probably re-gap you spark plugs down to 0.8mm though to avoid ignition problems :D

If this is your first round of mods I recommend:

*Front mount cooler kit

*Full turbo back zorst with split dump pipe and hi flow cat

*Boost controller set to 10 psi

The next round of mods after this start to become fairly expensive and include:

*Fuel pump

*ECU + tune

*Suspension and brake mods to help with safety and the increase in power.

Edited by BLK33T
BLK33T Community Regular

BLK33T

Posted
Posted

umm there not that quite man ... rather loud actually

if you put just the dump and split pipe on it won't make it very much louder but if you put a cat back zorst on like this it will be quite loud in comparison to standard.

where you located I can show what it sound like if your around Wollongong :whistling:

WOG BOY Community Regular

WOG BOY

Posted
  • Author
Posted

so which zaust system are the quietest apart from stock?

want the extra power but not the noise.....

sorry im mid way up the qld coast line...u got this system on ur ride? or know of someone who has....?

BLK33T Community Regular

BLK33T

Posted
Posted

^^^ yeah champ ... I've also got the split dump pipe and cat as well.

They made quite a difference to the power my car made ...

The best zorst you can get are from hi-tech mufflers in Sydney ...

Their exhausts give a wicked sound, will pass DB test .. they tested one on a R34 GTT in hot 4's vs a similar style exhaust as mine, and they make as much if not more power than the equivalent loud ARSE jap or massive cannon equipped zorst systems again this has been proven also.

The downsides are ...

They are in Sydney and they are expensive!

nizmo_freek Experienced

nizmo_freek

Posted
Posted
Thats a JJR cat back exhaust ... the thing welded into the zorst is a small resonator <--- I know this cause I just had one put on plus split dump and Hi flow cat!!!

This item that you are looking at is a great fit ... mine runs about 10mm off the floor pan it does have quite close clearance to the hicas though which doesn't really matter :whistling:

I would recommend thought if you are buying it new to get yourself the JJR split dump pipe and high flow cat ...

The split dump pipe helps to rid your exhaust of turbulence around the back of the turbo which will allow the motor to flow more air and hence more power ... the split dump and cat will add more power with or without a cat back zorst.

You will need to probably re-gap you spark plugs down to 0.8mm though to avoid ignition problems :D

If this is your first round of mods I recommend:

*Front mount cooler kit

*Full turbo back zorst with split dump pipe and hi flow cat

*Boost controller set to 10 psi

The next round of mods after this start to become fairly expensive and include:

*Fuel pump

*ECU + tune

*Suspension and brake mods to help with safety and the increase in power.

Thats not a JJR catback, its a HKS Silent High Power catback, its says SILENT On the exhaust tip (you can see it in the pics but not very clearly) ,i have the exact same one on my car.

And yes they are a bit loud (not drony though) ,far from being "silent"

SevenAngryPenguins Proficient

SevenAngryPenguins

Posted
Posted

i still think its a cat in there its bolts around the other way (from what someone suggested) you can see the hanger on the other end the hangers go at the back of the car, and you can also see the bend where it geos up to the dump pipe, i might be wrong though....

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