Foulsmell 120 Report post Posted April 16, 2016 10 minutes ago, Foulsmell said: I can confirm this worked for mine to get it through the mot. It may of passed the emissions test but it could still be a technical fail because two cats are not present. we only need 1 cat for UK MOT purposes, it's other markets that are stricter on the emissions (particularly cold start emissions) which is why there are 2 of them and that annoying cold start up Errr wrong. I have a secondary decat pipe which is clear that it doesn't have a cat and passed my MOT and it wasn't one of those fiddled jobbies that some people do Sent from my XT1572 using Tapatalk As do I. But as you can see it is a fail. It's all down to the testers knowledge wether there should be 2 cats or one. Just because yours passed doesn't make it right. I know testers that will pass a full decat. Share this post Link to post Share on other sites
Rich 378 Report post Posted April 16, 2016 They're not allowed to remove undertrays and you can't see the first cat without removing the undertrays. So they can't fail for the lack of the first cat because they can't prove you don't have one. Second cat is visible from under the car so a bit easier to spot if it's been removed. If you have a roughly cat-shaped resonator most testers would just pass it though (assuming it meets emissions). Share this post Link to post Share on other sites
Deacon 1357 Report post Posted April 16, 2016 It's also quite open to interpretation (as much of the mot regs are) - it says a cat must be present if one was fitted but it doesn't say anything about multiple cats. As I read that as long as there is a cat, which they can tell visually and/or through the emissions results, it would be ok. Share this post Link to post Share on other sites
Jamie_GRMN 177 Report post Posted April 16, 2016 The last I heard the 86/BRZ never came with a diesel engine so how on earth is that extract of the MOT requirements even relevant 2 will300 and Keethos reacted to this Share this post Link to post Share on other sites
Nicebiscuit 655 Report post Posted April 16, 2016 Back to the manifolds... Mine is now booked in for an UEL manifold and Ecutek in a few weeks time... Sent from my iPhone using Tapatalk 4 Mike@TD.co.uk, Foulsmell, Rich and 1 other reacted to this Share this post Link to post Share on other sites
Foulsmell 120 Report post Posted April 16, 2016 The last I heard the 86/BRZ never came with a diesel engine so how on earth is that extract of the MOT requirements even relevant :rolleyes: How flippant. It came in because diesel owners were removing DPFs. So it now applies to both petrol and diesel. All I'm saying is it's a technical fail but it hasn't stopped removing the 2nd cat. Just do what you like Share this post Link to post Share on other sites
Mike@TD.co.uk 467 Report post Posted May 7, 2016 Tuning Developments Equal Length Manifold Tuning Developments Overpipe Factory second CAT Factory CAT Back Exhaust K&N Drop In Panel Filter ECUTeK In House No more torque dip 3 Keethos, KobayashiMaru and Andrew Smith reacted to this Share this post Link to post Share on other sites
Nicebiscuit 655 Report post Posted May 7, 2016 Impressive . Can't wait till the end of the month... :-) Sent from my iPhone using Tapatalk Share this post Link to post Share on other sites
Ade 517 Report post Posted May 7, 2016 How much did the above car make in stock form with a tune? Really nice torque curve there. Share this post Link to post Share on other sites
Andrew Smith 156 Report post Posted May 8, 2016 8 hours ago, Ade said: How much did the above car make in stock form with a tune? Really nice torque curve there. I dont the figures at the moment but Mike has told me that the base numbers were lower than average making the gains all the more impressive and for a na the car pulls amazingly well. Share this post Link to post Share on other sites
Mike@TD.co.uk 467 Report post Posted May 8, 2016 20 hours ago, Ade said: How much did the above car make in stock form with a tune? Really nice torque curve there. We didn't tune this one prior to fitting the manifold Ade, so the 'dip' was well and truly there and peak power was 185bhp beforehand. We're gaining just about 35lb.ft at the largest point through the dip area now. Cheers Mike 1 Ade reacted to this Share this post Link to post Share on other sites
STEVO9000 54 Report post Posted May 8, 2016 3 hours ago, Mike@TD.co.uk said: We didn't tune this one prior to fitting the manifold Ade, so the 'dip' was well and truly there and peak power was 185bhp beforehand. We're gaining just about 35lb.ft at the largest point through the dip area now. Cheers Mike now I'm really looking forward to getting mine done next weekend! Share this post Link to post Share on other sites
KevinA 695 Report post Posted May 8, 2016 Mike do you think there would be a gain over my Tomei EL catless manifold ? Share this post Link to post Share on other sites
Kodename47 446 Report post Posted May 8, 2016 Probably a little, the runner lengths of these really help and this design stateside has always produced good results. Depends on whether you mind the pipework up into the bay IMO and whether the cost of swapping and remapping is worth it to you. Share this post Link to post Share on other sites
Mike@TD.co.uk 467 Report post Posted May 9, 2016 17 hours ago, KevinA said: Mike do you think there would be a gain over my Tomei EL catless manifold ? Kev I can overlay against your car when I get chance and see if it looks like a viable option or not for you bud. Thanks Mike Share this post Link to post Share on other sites
Varelco 211 Report post Posted May 9, 2016 Does this loop directly under the intake? Are IATs not increased? Share this post Link to post Share on other sites
STEVO9000 54 Report post Posted May 9, 2016 They do recommend removing the resonator box, however I'm having my up section that goes near the intake pipe heat wrapped as well Share this post Link to post Share on other sites
Nicebiscuit 655 Report post Posted May 9, 2016 They do recommend removing the resonator box, however I'm having my up section that goes near the intake pipe heat wrapped as well Would you recommend the above with your UEL manifold as well Mike? Share this post Link to post Share on other sites
Kodename47 446 Report post Posted May 9, 2016 2 hours ago, STEVO9000 said: They do recommend removing the resonator box That does have a small impact on driveability.... Share this post Link to post Share on other sites
STEVO9000 54 Report post Posted May 9, 2016 I've not heard any negative reports from anyone running a TD mani once mapped with the resonator removed. I recall people mentioning about a slight dip in power removing it in stock form. Share this post Link to post Share on other sites
Kodename47 446 Report post Posted May 10, 2016 7 hours ago, STEVO9000 said: I've not heard any negative reports from anyone running a TD mani once mapped with the resonator removed. I recall people mentioning about a slight dip in power removing it in stock form. It's there for part throttle and on/off applications. It does help otherwise the OEM wouldn't have used it. I did a load of testing years back, put it back on. Share this post Link to post Share on other sites
Mike@TD.co.uk 467 Report post Posted May 10, 2016 21 hours ago, Varelco said: Does this loop directly under the intake? Are IATs not increased? IAT are fine with the 'downpipe' section heat wrapped 21 hours ago, STEVO9000 said: They do recommend removing the resonator box, however I'm having my up section that goes near the intake pipe heat wrapped as well Either or Steve the car on the above graph still had the resonator box installed bud. Share this post Link to post Share on other sites
Andrew Smith 156 Report post Posted May 10, 2016 And its now a bloomin epic drive ⏩ 2 Mike@TD.co.uk and Deacon reacted to this Share this post Link to post Share on other sites
STEVO9000 54 Report post Posted May 10, 2016 2 hours ago, Mike@TD.co.uk said: IAT are fine with the 'downpipe' section heat wrapped Either or Steve the car on the above graph still had the resonator box installed bud. Sweet, we'll leave mine in then Can't wait for this weekend Share this post Link to post Share on other sites
