Jump to content
SAU Community

Recommended Posts

hey mate

Yes i did lose quite a bit of power. I still have the same cat on since the test i think its 2 and 3 quarter inch.

not interested in power atm.. i gotta upgrade the fuel pump and retune it on boost to go for around 350 - 380rwkw so I am going to invest into a 4" high flow cat which will cost around $400.

For now i will go back to using my xforce 3" highflow

Is it restrictive?

Did you loose much more power when you used this cat?

  • Replies 185
  • Created
  • Last Reply

Top Posters In This Topic

IF it does cost that much in VIC to get the test then you should look for a tuner that has a 5gas sensor system and pay him to tune it so you can pass the test the first go.

i cant stress how important it is to get a HIGH quality cat that has been proven to remove emissions. Catco is the way to go - i believe there is one that is a little better.

What was the procedure for the test? What did they do...

Max 4 min test on a dyno designed to simulate various load conditions (eg normal driving). Will stop earlier if it has clearly passed/failed the test, otherwise will continue for the full 240 seconds (hence the name).

The full 240 second test simulates driving over a 3.1 km course with an average speed of 47.3 km/h and a maximum speed of 91.2 km/h.

wooahhh.. nice answer :(

but they never stopped when i went the first time and leaned it off and the nox went up like nothing else :) they kept going and gave me a print out.

if you look at the sheet that i posted you can see the different gas's and the speed that the car was going as well. the top line is the speed the bottom is the emissions - as you can see its very low on bottom one. i should scan my first test and show you.. its pretty interesting the differences between the 2 tunes.

They drive it for around 30 seconds and then they come to a complete stop then keep going and then get up to 90ks an hour and cruise then come to a complete stop.

I think a stock turbo r33 would go into boost - so maybe disconnecting the actuator might help ;)

Max 4 min test on a dyno designed to simulate various load conditions (eg normal driving). Will stop earlier if it has clearly passed/failed the test, otherwise will continue for the full 240 seconds (hence the name).

The full 240 second test simulates driving over a 3.1 km course with an average speed of 47.3 km/h and a maximum speed of 91.2 km/h.

UPDATE !!

I passed the noise test today!!! just scraped in by 1db :)

got 87db at 3500rpm and 89db at 4000rpm

So now its smooth sailing to my engineers certificate !! just got to brace the huge hole i got the 3" intake pipe going through and take it back and pay my money!

UPDATE !!

I passed the noise test today!!! just scraped in by 1db :ninja:

got 87db at 3500rpm and 89db at 4000rpm

So now its smooth sailing to my engineers certificate !! just got to brace the huge hole i got the 3" intake pipe going through and take it back and pay my money!

how have you been advised to do this bracing?

  • 2 months later...

Congrats on passing the emissions testing!

I wonder though, what the point of it was? You say that you pro-actively submitted your car to these tests because you "wanted your car to be legal"...

But you say that you are going to replace the very restrictive catco cat with a 3" and possibly a 4" cat. That will render this passed test obsolete and irrelevant? Are you going to keep this tune, or are you going to lean it out again for greater fuel economy?

Fantastic job building and tuning your own car to a degree that you can control gas emissions to such a fine line, but I have to wonder what the point is, if you're just going to continue modifying your car and render this passed test useless?

The reason i did this was to get my car legally engineered. The way it works is that you must get the IM240 test to get a engineers certificate to prove that the modifications you have made ie - intercooler and plenums and exaust manifolds and injectors and ECU etc etc do not change the emissions of the car.

I have heard that EPA can do road side tests and when they do the legal limits are different to what the RTA is - i have heard that the RTAs IM240 is twice the limits as the EPA so if you get a good high flow CAT the EPA tests will pass without any issues.

Oh and i have not touched the cruise tune since the testing at all as it is fine as it is and still gets good fuel economy but not as good as it was.. bit of a trade off i guess.

Edited by Guilt-Toy
  • 5 months later...
  • 1 month later...

Good to hear is all clear..

I got detoured to an epa station last night.

They got me for;

* Exhaust (noise)

* Air Filter (induction noise)

* non-standard intercooler - turbo

* adjustable fuel pressure regulator

* catch can has a filter on it

Can anyone give me some more advice as to what i should change or do.

Car - 1990 R32 GTR

Current Mods

* PowerFC dejetro

* cams

* Single hi-mount turbo

* bigger fmic

* airfilter

* exhaust

* Fuel pressure regulator

* External Gate

* Catch can

Your help would be greatly appreciated

Dave

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

    • LOL.... a good amount of people (not all) on that continent seem to know everything and like to measure things in bananas, football fields, statue of liberties instead of the metric system lol.
    • I assume the modules are similar enough, so if you've had no issues I don't see why I would. I have tried to find a wiring diagram for the FPCM / fuel pump circuit, but I can't find it anywhere. Otherwise, I would just do some wire cutting and joining at the FPCM and give the 12 V supplied to the FPCM directly to the pump instead. If you know anyone that could help with wiring diagrams, I'd be very happy  
    • If it dies, then bypass. The task isn't difficult. I have one running on a standard R32 FPCM. That's after nearly 20 years of it running an 040, which pull substantially more current than the Walbro. They're not the same module, but I'd hope it indicates that the R33 one should be man enough for the job. I think people kill them when putting proper sized pumps on them, not these little toy pumps we're talking about here.
    • Silicone spray won't hurt anything. And if it does, that's an opportunity to put some solid steel spherical bushings in, so you can really learn what suspension noise sounds like, If you're going to try it, just spray one bush at a time, so you can work out which one is actually noisy. My best guess is that if the noise started only since putting the coilovers in, then it is just noise being transmitted up through the top mounts of the struts, and not necessarily "new" noise from bushes. But it's almost impossible to know.
    • Are you saying the 34 is SUV height, and not that we're talking about an SUV here? (because if we're talking about an SUV, you don't fix them. You just replace them when something breaks. Not worth establishing sufficient emotional connection with an SUV to warrant doing any work on one). I wouldn't jack my car up on a short little loop of 10mm steel rod poking out through a hole in the bumper bar, front or rear end. I realise that we're probably not talking about that type of loop at the front, being the one under/behind the bar on a Skyline.... but even for that one, trying to jack up on what amounts to a thin piece of steel, designed purely for withstanding a horizontal tension force, not a vertical compressive force (and so would be prone to buckling/crushing) and, my most particular bitch about it - located RIGHT AT THE EXTREME FRONT OF THE CAR, applying a load up through the radiator support panel, etc, with almost the entire mass of the car cantilevered between there and the rear wheels? Nope. Not doing that. Not on the regular. That structure out there in front of the front crossmember is not designed to carry load in the vertical direction. Not really designed to carry any load at all, really. The chassis rail that the tow point is connected to would be fine loaded in tension, as per towing. Not intended to carry the mass of the whole car, especially loaded all on one rail, with twisting and all sorts of shitty load distribution going on. No, I will happily drive up on some pieces of wood, thanks. That can only happen on driven wheels, and they are at the other end of the car, and this problem does not exist at that end of the car. And even then, I have been known to drive up on at least 1x piece of 2x8 each side at the rear, simply to reduce the amount of jack pumping necessary to get the car up high enough for the jack stands. What really really shits me about Skylines is the lack of decent places for chassis stands at either end of the car. You'd think they'd be designed into the crossmembers.
×
×
  • Create New...