Jump to content
SAU Community

Recommended Posts

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

Link to comment
https://www.sau.com.au/forums/topic/206037-very-quick-exhaust-question/
Share on other sites

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

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

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

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
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

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!

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

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:

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....?

^^^ 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!

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"

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....

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Put a fuel pressure gauge on it. Replace the turbos. Probably completely separate issues.
    • What copper washer do you guys use on the bleeder bolts? The existing one I have I had no idea where to find it in a local store, I did buy some online but that are only 1mm thick whereas my old one is 2mm+ thick and when I put the new washer out and squeeze the top radiator hose I can hear a bit of air but not with the old one. Does this matter? The new one doesn't leak, but the inner diameter is a bit loose whereas the old one threads on the bolt.
    • Howdy all, after being out a few weeks ago on a spirited drive in my GTR I have 2 issues that oddly have appeared at the same time. Whilst accelerating quickly through the gears all of a sudden i’ve lost power at the top of third gear (below redline around 6000rpm) for no obvious reason.    From that point onwards the car has been running rich on idle, won’t really rev under load without a ton of black smoke and the odd backfire, and dying as a pull up to a set of lights unless I keep the revs up around 1500rpm. In addition when shutting down the car that same night (I was 10 minutes from home) I noticed one of the turbos was significantly noisy on wind down when shutting off the engine. After letting the car cool down overnight it starts up fine, although once it gets to temp the revs start to creep up and down, the exhaust is darker than it should be and it also sounds like it’s running rich (fat note) I’ve put a new set of plugs in it - no change, the old plugs all seemed OK with two of them being somewhat richer/fueled up than the other 3 with 1 being borderline. I’ve smoked tested the intake system via the front of the Turbos, found a split vacuum hose going to the factory boost gauge sender, which I have since replaced.  Also found another leak on the gasket coming off the rear turbo outlet, have also replaced this. After fixing both of these leaks - still have the running rich issue. I’ve also tried another pair of AFM’s - no change here After pulling off the front turbo intake pipes, there is obvious shaft play in the front turbo, which now hisses loudly on light revvs although I can’t see why this would make the car run funny even under idle. I’m curious to know why it’s running rich before I potentially replace/rebuild turbos. The car is completely stock <50,000kms  other than an exhaust. Oil and coolant are all clear. I haven’t bothered with coil packs as it looks like they won’t be the issue due to condition of the plugs. Any help appreciated as I cry myself to sleep!
    • No probs at all. I used to love trying to dig up obscure info for those in need where possible going back 20+ years on SAU.  I did have another look and couldn't come up with any closer match. I'm leaning towards those skirts in your first pic are custom fitments, cut down/extended or from another car entirely and modded to fit an R34 sedan. I would've thought someone in Japan had them and taken a photo at some stage over the last 2 decades but there's nothing. Someone out there must know surely.
×
×
  • Create New...