Emission Testing Modified Skyline's

[Guilt-Toy]

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?

[Guilt-Toy]

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.

[raz0r$harP.UK]

Guilt-Toy who's your consulting engineer?

[Guilt-Toy]

not too sure at the moment.. i got a few options. one on the central coast and one in sydney and one in newcastle.

[benm]

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

[raz0r$harP.UK]

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.

[Guilt-Toy]

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.

[Guilt-Toy]

the cat was 2.5 inch Catco

[benm]

Would it be fair to say that you had an easier chance of passing because it takes a little while for your turbo to boost up compared to say a stocker running at 12psi?

[Guilt-Toy]

not really because its not very hard at all to disconnect your wastegate actuator

[Al]

not really because its not very hard at all to disconnect your wastegate actuator

[Guilt-Toy]

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!

[Craved]

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!

how have you been advised to do this bracing?

[Guilt-Toy]

I have to plate the outside ring of it with metal so its stronger

how have you been advised to do this bracing?

[Merli]

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?

[Guilt-Toy]

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 May 20, 2007 by Guilt-Toy

[kyle785]

is a EPA approved cat all im after

cheers kyle

[belo]

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

[Cubes]

How did they pick aftermarket turbo's? GTR, everythings tight and difficult to see; or didn't you have a set of bolt on garret /hks turbo's?

[stolen_s15]

He mentions a single hi mount.

(Why you would not go low twins on a steet GTR is beyond me)

Edited December 10, 2007 by stolen_s15