Jump to content
SAU Community

5 Gas Test And Cat Converter

Sizygy

By Sizygy,
in Engines & Forced Induction

 Share

Recommended Posts

Sizygy Apprentice

Sizygy

Posted
Posted

Hey guys, I know this is a done topic but im searching for an answer from people who have done this, anyway, I'm in WA with an r32gtr, took it over the pits and have to get it engineered, which means a 5 gas test.

I went over with cams and failed hard, so am going back to stock for for the test and some id1000 injectors and tune to suit.

Where I am struggling for a definitive answer is on on the Cat converter, I 've been reading and am unsure, people are saying stock ceramic cat, so are a couple of shops but 2 other shops have said to go something like a 400 cell euro 4 cat.

I don't know much about this so can anyone that has passed with a similar setup share their experience with what cat would be better or if there are any better ones to go for that would be much appreciated.

Link to comment
https://www.sau.com.au/forums/topic/403635-5-gas-test-and-cat-converter/
Share on other sites
abr33 Proficient

abr33

Posted
Posted

Depends on the tune, too rich will fail, too lean will fail.

I do happen to know what will make you pass. I did IM240 test here in NSW, presume similar test.

I got the cat out of a new bf xr6 turbo, and made it fit my system. its 3" in and outlet.

It was literally running euro 4 standard at most points of the test.

A normal cat will not flow real well compared the the massive substrate in the falcon cat, in which it has enough time in the substrate to properly convert.

Keep in mind, the newer the better. Even a new cat thats had a bad bit of fuel burnt, or slightly poor/rich/lean tune will have glazed the substrate and be useless.

I did this after epically failing with x-force cat.

Stock ecu also.

TiTAN Grand Master

TiTAN

Posted
Posted

Ok thanks, good info, I think the 5 gas is a little more lenient than IM240, ill ring a couple places tomorrow about an xr6t cat. I'm running a vipec ecu.

*edit* abr33 is that with and Rb26 and stock injectors or a 25?

i passed the IM240 with a euro 3 cat (euro 4 will be better), 740cc injectors, gt35r, stock cams (big cams will hurt your results), running off a vipec plugin. if its tuned for emissions with a good cat is possible to pass with a fairly modified car.

rob82 Mentor

rob82

Posted
Posted

Most three way Catalytic converters need the tune to be close to stoic in order to keep the cat at elevated temperature and to aid in the reduction of your three gases. This will be difficult with 1000cc injectors. I would also recommend using std 370cc injectors or similar.

Moodles2 Grand Master

Moodles2

Posted
Posted

If getting a cat, stick with Catco or Magnaflow as these will actually pass an emissions test. Catco have had their's tested with the EPA and have certificates for them whereas knockoffs (X-force which is a copy of a HKS cat for example) don't have a chance in hell of passing. Magnaflow being american and Californian emissions laws I think being even stricter than Euro standards.

TiTAN Grand Master

TiTAN

Posted
Posted

thats probably just something they do so its almost guaranteed to pass first time but running 5 cats isnt practical or cheap and you have to get them all up to temp before they work properly anyway, they should always do 2 tests when checking, you will notice the first test is almost always a fail as the cat isnt at operating temp and then they do a 2nd test which has massively improved results as your cat has got some heat into it.

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      My BMW 335i

      By MBS206 · Posted

      If that's the wiring from the factory, I'd be inspecting the loom everywhere.   Any signs of that anywhere else, and seriously, I'd get rid of the car ASAP before the electrical gremlins make it worthless, or it goes up in flames on its own. That is scary how that insulation is failing!
    • welshy_32ZILA
      Welshys 32ZILA and the 8HP.

      By welshy_32ZILA · Posted

      I should note too as I have all 4 wheel speed inputs to the emtron I now have the emtron controlling the attessa solenoid for 4wd/traction and launch control strategies. 
    • welshy_32ZILA
      Welshys 32ZILA and the 8HP.

      By welshy_32ZILA · Posted

      It works quite well with the adjustibility within each of the programs of the turbolamik. Essentially p1 is drive and lockup comes on like a normal driver.  But in program 7 I have customised it to not request the lockup clutch to engage until something like 6500/7 when slip was the lowest. 
    • PranK
      Use text replace function to auto-link to referred threads?

      By PranK · Posted

      Yep, I like that. The tags are only on the first post of a thread and we don't get huge numbers of new threads. Also, I plan to add some more report types and we could have a member report type like 'review tags' then members could flag if they thought a topic wasn't tagged correctly.  No way man, I dig the input. Thanks! 
    • GTSBoy
      Use text replace function to auto-link to referred threads?

      By GTSBoy · Posted

      It's a valid thought. There's not exactly that functionality already (when creating a thread) - that's where the OP can use/create any tag they want. We'd have to come up with a way for the user to request their tags get reviewed or something. Otherwise the mods would have to review every new post's tags (for those that have them, anyway). There's kind of that functionality already exists to some extent, post facto of starting the thread, where the OP or any other user could report the post to admins, and request that tags get reviewed. We could do this already, and any user could already have made such a request. To make it a part of the forum proper, it would require an initial and an ongoing education programme, so that people know that it's a thing. OP based tagging/request for review would also require at least some (probably most) of the user base to be told that it's a thing they can do. Both of these things probably wouldn't spread too far and/or get used very much. If it was the standard approach on a lot of different sites, then it might do, because people would be used to it. Prank's approach to this differs from my original thought, by leaning into tagging. Which is fine - it's possibly better than what I originally suggested. In fact, I just went to the R32 GTR wiring diagram thread and added tags, including "Library". That's probably a good way to use tags and the idea of a library. We just have to drag together an (organised!) index of threads or posts that have that tag. I have yet to do any of my own follow up by pursuing worthy threads and posts and reporting/marking/tagging them for the library, such as the @Sydneykid stuff I was talking about, and possibly any amount of @Lithium 's and others' posts. At least if I tag them Library, we'll have a start.   Back to @Wazmond's idea as it relates to @PranK's, we might have some sort of a list of tags that are already used to scrape for this library. I'm not entirely sure how that would be presented or used, particularly if it got long. But it's yet another idea!   cheers
×
×
  • Create New...