KrazyS14

Just found this thread now Anthony (yes i know, bringing it back from the dead) and congrats on passing it and gettin engineered. I was in the same situation as you back in September last year after getting defected on that infamous night in Newy the weekend of the Apec summit. My recommendation when going to do this test is to speak to your engineer first! Cannot stress that enough. I found Athol Mullen in Cardiff to be lots of help. Few things I noted from this thread and people's concerns in general about this test (keep in mind this is for an SR20 so may be different for all you RB fellas): 1) You CAN pass with aftermarket cams (albeit mild cams). I passed mine with Tomei Poncams (slightly larger turbo, 740cc inj, 3" exhaust with hiflow cat, etc), my emissions came in at 1/3 of the limit for all 3 gases (they don't limit CO2 emissions cos it's what you're supposed to get from combustion). 2) The test is 100% free in NSW, you can do it as many times as you want, they do not keep a record or anything of you failing. 3) Increased CO & THC levels are due to an excessively rich mixture, increase in NOx levels are due to an excessively lean mixture (as you mentioned previously), so it's a case of finding a balance between the two, most tuners (Guilt-Toy for example ) shouldn't have a problem with doing this. 4) Your engineer (pretty sure the emissions testing station doesn't have them) should have access to relevant ADR limits for emissions for your particular vehicle. Hope this helps anyone else.