Guest NaspSupra Posted October 15, 2009 Share Posted October 15, 2009 Replaces stock manifold and both cats on non turbo supra. Bought brand new and only been on since JAE. Perfect in every way and fits without any rubbing of steering or anything. Manifold holes line up perfect. £300 for the pair PM me Link to comment Share on other sites More sharing options...
Guest ugp Posted October 16, 2009 Share Posted October 16, 2009 Any noticeable increase in power or is it just noise? Ben Link to comment Share on other sites More sharing options...
Guest NaspSupra Posted October 16, 2009 Share Posted October 16, 2009 More lower down torque (i've kept the standard back box for back pressure) and revs up a lot faster. Sounds like an M3 (the rasp) but with more meat behind it. Link to comment Share on other sites More sharing options...
Ali C Posted October 16, 2009 Share Posted October 16, 2009 Would you take £250 and il sort out the delievery? Link to comment Share on other sites More sharing options...
Kirk Posted October 16, 2009 Share Posted October 16, 2009 with these things you lose bottom end so lower torque increase is over exagerating... all companys say they do all these good things but in truth its just noise with probly 5-8hp increase at top end Link to comment Share on other sites More sharing options...
Ali C Posted October 16, 2009 Share Posted October 16, 2009 on that note "m_life" i have a cat back system already, if i was to add a full de-cat would i lose back pressure and if so how to i rectifi it.? Link to comment Share on other sites More sharing options...
Kirk Posted October 16, 2009 Share Posted October 16, 2009 if you fully decatted for 1 the dam thing would be far to loud and you would lose backpressure, best option, leave 1 cat in Link to comment Share on other sites More sharing options...
Ali C Posted October 16, 2009 Share Posted October 16, 2009 ok so dont go for the jap speed mid section.? I take it just buying a de-cat will i.e 1st, will fit onto the orginal system ok? Link to comment Share on other sites More sharing options...
Kirk Posted October 16, 2009 Share Posted October 16, 2009 if you get the manifold, leave the 2nd cat in or it will be seriously noisy! if the decats made for the car then it will fit no problem providing all your piping is the same diameter all the way through Link to comment Share on other sites More sharing options...
Ali C Posted October 16, 2009 Share Posted October 16, 2009 thanks very much by the way for the info.. Link to comment Share on other sites More sharing options...
Guest ugp Posted October 16, 2009 Share Posted October 16, 2009 http://www.uucmotorwerks.com/html_product/sue462/backpressuretorquemyth.htm Link to comment Share on other sites More sharing options...
Homer Posted October 16, 2009 Share Posted October 16, 2009 http://www.uucmotorwerks.com/html_product/sue462/backpressuretorquemyth.htm Link to comment Share on other sites More sharing options...
Guest ugp Posted October 16, 2009 Share Posted October 16, 2009 Glad you approve, I'm sick of trying to argue the facts, would rather just post the link Link to comment Share on other sites More sharing options...
Ali C Posted October 16, 2009 Share Posted October 16, 2009 Ok so its not a bad thing to fully de-cat you'r car...??? Am i correct or just a dummie hehe Link to comment Share on other sites More sharing options...
Guest ugp Posted October 17, 2009 Share Posted October 17, 2009 Go for it, if you can put up with the additional noise (not a bad thing ). Your fuelling will automatically adjust. Link to comment Share on other sites More sharing options...
HadeS Posted October 17, 2009 Share Posted October 17, 2009 Some say there is posibility to get flat spot after double decat. Link to comment Share on other sites More sharing options...
David P Posted October 17, 2009 Share Posted October 17, 2009 Autobahn 88 + 3" mid pipe + catback 3" system. Fit a 3" 200 core racing cat at the front of catback, and 1 or 2 Morosso spiral mufflers in the line and an Apexi spring loaded tail silencer. You will have a quiet cruise, back pressure for torque, and it lets both the horses and the noise out when you boot it. Voila Link to comment Share on other sites More sharing options...
Guest NaspSupra Posted October 18, 2009 Share Posted October 18, 2009 since i dumped both cats the car pulls better over the whole rev range. no flat spots at all. Link to comment Share on other sites More sharing options...
suprasam77 Posted October 18, 2009 Share Posted October 18, 2009 i hate that back pressure myth! stop saying it! Link to comment Share on other sites More sharing options...
Guest ugp Posted October 18, 2009 Share Posted October 18, 2009 Autobahn 88 + 3" mid pipe + catback 3" system. Fit a 3" 200 core racing cat at the front of catback, and 1 or 2 Morosso spiral mufflers in the line and an Apexi spring loaded tail silencer. You will have a quiet cruise, back pressure for torque, and it lets both the horses and the noise out when you boot it. Voila Please explain how "back pressure" equates to retaining torque? READ IT!: http://www.uucmotorwerks.com/html_product/sue462/backpressuretorquemyth.htm Link to comment Share on other sites More sharing options...
David P Posted October 18, 2009 Share Posted October 18, 2009 I have thoroughly researched this, and there are divided opinions, however, it is proven that for an N/A Supra, 2 ½” is best for torque and 3” is best for horse power, with 2 ¾” being a happy medium. Ideally you need 2 1/2" for low revs and cruise, and 3" for the track. So I have designed and built a system that lets you 'have your cake and eat it too'! Autobahn88 exhaust manifold, thermal wrapped. Blitz 3" midpipe, thermal wrapped. 3" H.K.S. exhaust system. Magnaflow 200 core racing cat immediately after flange. Wideband sensor fitted into front of cat. 2 X Morosso 94501 spiral racing mufflers, 1 immediately after cat, and the other just before the back box. (1 would be sufficient for most, but I drive long distances and wanted peace and quiet on cruise) Apexi Integration 155-A025 spring loaded tail silencer at back. The manifold, midpipe, cat, spriral mufflers and back box are all 3" bore for horse power, and the spring loaded tail pipe restricts the gasses at low revs and cruise, but opens up under load. Voila! Link to comment Share on other sites More sharing options...
Guest NaspSupra Posted October 18, 2009 Share Posted October 18, 2009 Sorry guys but if you wanna discuss the myths of backpressure in exhausts then please do it in your own thread and not in my for sale thread. Cheers, Lee For those who have emailed me and are interested, about my system that im selling here in this thread... (Autobahn Manifold, JapSpeed Midpipe and standard back box) Without the cats there is noticeably faster revving up from idle, no loss in torque that i can see anywhere in the rev range. There is a little more of a grunt that can be heard at low speeds. At anything below 2700 rpm the car sounds 100% stock. Above this there is a noticable rasp similar to that of an M3 on WOT. At motorway speeds its as quiet as a stock exhaust system. There is no point in dumping the stock back box on a nasp as its the exact same back box as the turbo has. The UK turbos push 326bhp stock with the same back box so unless your expecting to push your nasp beyond this, the stock exhaust will never cause you a restriction. Link to comment Share on other sites More sharing options...
Dave_SZ-R Posted October 19, 2009 Share Posted October 19, 2009 Would you do manifold only? You can see from my posts that Ive been after a manifold for a while... Dont really need the midpipe (unless you are doing a nice price!). Cheers, Dave. Link to comment Share on other sites More sharing options...
Guest NaspSupra Posted October 19, 2009 Share Posted October 19, 2009 Hi, yes its provisionally sold to someone else for £250 but i havent heard anything and they havent paid yet. So its technically still up for grabs. Link to comment Share on other sites More sharing options...
Dave Posted October 19, 2009 Share Posted October 19, 2009 err ive had no cats in mine for 5 years and she purrs like a cat with no flatspots or any noticable difference from stock other than it revs easier and noise was only increased slightly depends what exhaust system you have . just remember to reset the ecu after you have fitted something or removed cats. Link to comment Share on other sites More sharing options...
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