Fulcrum2000 Posted February 8, 2022 Share Posted February 8, 2022 Hi All So my BPU decatted Supra (93 TT Auto) has just failed it's MOT on emissions for the first time ever. It's been BPU 3 years but I guess I got a real stickler this time. It has a 3 inch exhaust system with straight downpipes. Is there any 3 inch race cats that run BPU but pass emissions that anyone on here use and if so what sort? Any help you can give would be MUCH appreciated as I am off the road now by law! Quote Link to comment Share on other sites More sharing options...
Annabella Posted February 8, 2022 Share Posted February 8, 2022 Spunkmeyer has these, will get you through the MOT. Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted February 8, 2022 Author Share Posted February 8, 2022 Are the normal cats 2.5 do you know? And will I meet the emissions with one fitted? Also has nobody produced an exhaust system with a race cat or cats fitted that I can just buy and leave on for BPU (ish) performance? I don't mind spending some wedge to do this. Quote Link to comment Share on other sites More sharing options...
Annabella Posted February 8, 2022 Share Posted February 8, 2022 He says they're probably TT cats, other than that contact him. New MOT rules stipulate, if it had 2 cats at manufacture then it has to have two cats at MOT, not having 2 at MOT is technically a fail regardless of emissions. This inspection only applies to vehicles requiring a full catalyst emissions test (disregarding the Basic Emissions Test) and is restricted to components that are readily visible and identifiable, such as catalytic converters, oxygen sensors, exhaust gas recirculation valves etc. It goes on to state: ‘(a) Emission control equipment fitted by the manufacturer: missing, obviously modified or obviously defective’ is a major defect and therefore a fail. It therefore appears missing or modified original emissions control equipment is in itself a major defect. There seems to be no allowance for partial removal even if an emission test is passed unless it is buried somewhere else in the document. On the face of it. the new test looks like bad news for modified cars. From your avatar, you have a mk3 and therefore requiring a full catalyst emissions test. I’d put the ‘upgrade’ on the back burner if I were you. I think there are going to be some ‘interesting’ MOT discussions after May. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted February 8, 2022 Share Posted February 8, 2022 Id suggest you have another issue if it passed previously, dirty air filter, O2 sensor, ECU temp sensor, leaky exhaust gasket. The emissions limit for an import are very generous so its worth doing a bit of invest before throwing money at it Quote Link to comment Share on other sites More sharing options...
Bender Posted February 8, 2022 Share Posted February 8, 2022 Or find a friendly mot tester 1 Quote Link to comment Share on other sites More sharing options...
Annabella Posted February 8, 2022 Share Posted February 8, 2022 (edited) 1 hour ago, Swampy442 said: Id suggest you have another issue if it passed previously, dirty air filter, O2 sensor, ECU temp sensor, leaky exhaust gasket. The emissions limit for an import are very generous so its worth doing a bit of invest before throwing money at it As it can be compared to the UK spec supra, I'm not sure that applies. Afaik its the na supra import that doesn't have a comparison, hence doesn't get the full emissions test? To the OP did they mention it had not cats and that's why it failed? Edited February 8, 2022 by Annabella (see edit history) Quote Link to comment Share on other sites More sharing options...
The Raven Posted February 8, 2022 Share Posted February 8, 2022 Indeed the twin turbo engine is in the book so the vin will say it needs a cat test. The na engine isn’t and due to its age it gets a non cat test. Converted na ftw Quote Link to comment Share on other sites More sharing options...
Big Supes Posted February 9, 2022 Share Posted February 9, 2022 I'd find another garage personally. Sod having to put the cats back in every MOT because some government dimwit thinks it's a good idea. 1 Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted February 9, 2022 Author Share Posted February 9, 2022 Thanks for all the input guys! To clarify it is a 93 MKIV TT Auto and the fail (amongst a couple of other niggles to fix) does state there is a cat missing and also emissions level fail, I believe on fast idle but I don't have it in front of me but it definitely stated missing cat and emissions high. With this said and many thanks to Annabella for the tip off allowing me to buy a second cat last night .This should be here tomorrow and I already have the first cat from my original car so I am going to have these bolted back on and it should then pass both stipulations. My only question is do I need any kind of adaptor to bolt it back on to the rear section? Obviously the two cats will fit to the manifold and each other but how do you connect a 3 inch rear section to the end of the second cat? What type of adaptor is required or does it just fit? Quote Link to comment Share on other sites More sharing options...
Burna Posted February 10, 2022 Share Posted February 10, 2022 If they are standard de-cat pipes it should all just fit. Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted February 10, 2022 Author Share Posted February 10, 2022 They're just the standard 3 inch decats from WhifBitz. I don't know why I just assumed the standard exhaust was 2.5 inch where it joined the back box? Quote Link to comment Share on other sites More sharing options...
Burna Posted February 10, 2022 Share Posted February 10, 2022 23 minutes ago, Fulcrum2000 said: They're just the standard 3 inch decats from WhifBitz. I don't know why I just assumed the standard exhaust was 2.5 inch where it joined the back box? Doesn't matter about the decat pipe diameter, the flanges will match up. Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted February 10, 2022 Author Share Posted February 10, 2022 Cheers for your help, I have been in touch with a different mechanic and will get this plan into action. 1 Quote Link to comment Share on other sites More sharing options...
Burna Posted February 10, 2022 Share Posted February 10, 2022 55 minutes ago, Fulcrum2000 said: Cheers for your help, I have been in touch with a different mechanic and will get this plan into action. You're welcome Quote Link to comment Share on other sites More sharing options...
mattdavies Posted February 10, 2022 Share Posted February 10, 2022 You can see why there will be a market for "postal" MOTs in the future with MOT testers profiting out of it. There is a guy on instagram who last time i saw was charging £170 for a "Postal" MOT Quote Link to comment Share on other sites More sharing options...
The Raven Posted February 10, 2022 Share Posted February 10, 2022 I was under the impression a tt would pass with just the second cat in? Quote Link to comment Share on other sites More sharing options...
Burna Posted February 10, 2022 Share Posted February 10, 2022 8 minutes ago, The Raven said: I was under the impression a tt would pass with just the second cat in? It's not just about the emissions now, they have to see both cats in place. Quote Link to comment Share on other sites More sharing options...
Noz Posted February 10, 2022 Share Posted February 10, 2022 Cats and bypass valves are the future. 1 Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted February 10, 2022 Share Posted February 10, 2022 2 hours ago, Burna said: It's not just about the emissions now, they have to see both cats in place. Is this a new thing? Im not up on the import rules. When did it change? Quote Link to comment Share on other sites More sharing options...
Annabella Posted February 10, 2022 Share Posted February 10, 2022 30 minutes ago, Swampy442 said: Is this a new thing? Im not up on the import rules. When did it change? May 2018 I think. Quote Link to comment Share on other sites More sharing options...
The Raven Posted February 11, 2022 Share Posted February 11, 2022 (edited) I’d hazard a real good guess that unless they want to really really look they will see a second cat run the emissions test and pass it. I know the 2jz gte engine is in the handbook does it also list number of cats? The last time I took my na converted to a different mot center they put it though as a mk3 and failed it for no cats. Simple check in vin at another garage and it passed a non cat test. Edited February 11, 2022 by The Raven (see edit history) Quote Link to comment Share on other sites More sharing options...
Tyson Posted February 12, 2022 Share Posted February 12, 2022 On 2/10/2022 at 7:07 PM, Noz said: Cats and bypass valves are the future. You have to think that the additional emissions from modified cars pales in comparison to the genuinely knackered bangers spewing vast clouds of black smoke out? As ever, just focusing on the easy targets rather than the real problems. 2 Quote Link to comment Share on other sites More sharing options...
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