johnd-mkiv Posted July 3, 2006 Share Posted July 3, 2006 These pipes have been jigged up an tested on a two supras with no problems, made from 316 stainless and mild steel 10mm lazer cut flanges that have been tig welded into place. also includes a 1.2bar restrictor ring made from stainless steel £100 comparrison to a genuine apexi decat Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted July 3, 2006 Share Posted July 3, 2006 less welding too.... that looks a good job mate Link to comment Share on other sites More sharing options...
markrzs Posted July 3, 2006 Share Posted July 3, 2006 If you've got one of these next month i'll have one, but funds are a bit short at the mo Link to comment Share on other sites More sharing options...
Ian Ian Posted July 3, 2006 Share Posted July 3, 2006 Yeah me too I,ll have one next month mate whereabouts are you ? for posting or collecting etc ...have you or are you making more ? it does look like a good job Cheers Ian Link to comment Share on other sites More sharing options...
SUPRALOOPY Posted July 3, 2006 Share Posted July 3, 2006 And they fit straight up:) Fantastic bit of work they are. the pics don't do them justice. JUST BUY ONE you know it makes sense:d Link to comment Share on other sites More sharing options...
Ian Ian Posted July 3, 2006 Share Posted July 3, 2006 I will mate just need to pay some bills first LOL Cheers Ian Link to comment Share on other sites More sharing options...
Guest blueangel Posted July 3, 2006 Share Posted July 3, 2006 do these fit a n/a can u pm me if they do as i forget where i post lol Link to comment Share on other sites More sharing options...
Jake Posted July 3, 2006 Share Posted July 3, 2006 How many have you got? Link to comment Share on other sites More sharing options...
johnd-mkiv Posted July 3, 2006 Author Share Posted July 3, 2006 How many have you got? a few can make as many as wanted im in Essex. Link to comment Share on other sites More sharing options...
psymon Posted July 3, 2006 Share Posted July 3, 2006 How much for Postage mate Link to comment Share on other sites More sharing options...
johnd-mkiv Posted July 3, 2006 Author Share Posted July 3, 2006 Guess around £10 i'll know an exact price once ive posted a couple john d Link to comment Share on other sites More sharing options...
supra_surj Posted July 3, 2006 Share Posted July 3, 2006 I want one.this replaces the cat but would i need to do anything else for the decat? Link to comment Share on other sites More sharing options...
JODY T Posted July 3, 2006 Share Posted July 3, 2006 Depends if its a NA or Turbo If its a NA then no you dont need to do anything but get the second decat to fully unrestrict the exhaust.. If its a Turbo then decatting will increase the boost and i 'think' you need a boost controller as the boost goes over 1.2 bar, and you turbos will go 'BANG' I have a NA so if the turbo bit isnt quite right, Sorry im learnin Link to comment Share on other sites More sharing options...
JODY T Posted July 3, 2006 Share Posted July 3, 2006 Just found this Name: Decat Also known as: Double Decat CAT removal Straight through exhaust pipe What is it? The stock Supra has two catalytic converters. These do all manner of wonderful things for the emissions of the engine, but to do so they get in the way of the exhaust stream, and this reduces the flow and increases backpressure. In a turbo car, backpressure is an evil, and once you are past the turbos you need a little as possible. The restriction also increases the heat in the engine bay because one CAT is on the downpipe. Decatting simply replaces the exhaust pipes with the CATs in for exhaust pipes without CATs in. The diameter and quality of material etc. varies but they all do this one simple function. The bonus factor is that freer-flowing exhaust means a small increase in the volumetric efficiency of the engine. That means more power. Double bonus is the the turbos can flow more air so they produce more boost. That means *lots* more power. People who get decats done regularly report of the car feeling like a new one afterwards, the difference is that big. However, the increased boost is a double-edged sword, you have to watch out for boost creep, running lean on fuelling, and fuel cut kicking in. Running lean after a decat is a very real phenomena, the J-spec fuel pump isn't up to the job most of the time, and the ECU can't fuel for more than 1 bar of boost anyway, especially once the fuel cut is removed. Pros: Increases the volumetric efficiency of the engine, thus giving you more power Increases the boost of the turbos, giving you more power Removes heat from the engine bay Cons: Apart from some success with the first (1993.5) MkIV Supras, you will need to swap one CAT pipe (usually the centre section one as it's easiest) back in order to pass an MOT Boost creep may occur Fuel Cut may occur Your fuelling may not be adequate for the extra boost Stock j-spec ceramic turbos appear to go pop faster under the higher boost levels You will need a colder grade of spark plug with a 0.8mm gap (instead of stock 1.1mm) as the higher boost will cause a Misfire Thanks to Ian R for this.. Link to comment Share on other sites More sharing options...
supra_surj Posted July 3, 2006 Share Posted July 3, 2006 Yea i have a TT and also have a blitz boost controller which is set to 1bar. That should be ok??? Link to comment Share on other sites More sharing options...
johnd-mkiv Posted July 3, 2006 Author Share Posted July 3, 2006 Yea i have a TT and also have a blitz boost controller which is set to 1bar. That should be ok??? will come with a restrictor ring that will keep it below 1.2 bar Link to comment Share on other sites More sharing options...
pistonbroke Posted July 4, 2006 Share Posted July 4, 2006 Yea i have a TT and also have a blitz boost controller which is set to 1bar. That should be ok??? Well look at you Surj, going all BPU. DON'T DO IT!!!!! You'll make me do it, and I really haven't got the cash flow for it at the moment. don't listen to me matey, I'm only jealous. When you get it done you'll have to take me for a spin in it. Oh, and just a little advice, get a walbro fuel pump upgrade, you really don't want these engines running lean, the results tend to be pretty terminal. Seeya soon dude. Link to comment Share on other sites More sharing options...
supra_surj Posted July 5, 2006 Share Posted July 5, 2006 Haha how you doing Dan? Hey should have my new wheels delivered tommorrow. Hope they all fit ok over my brakes. Getting my sounds done on thursday. All i got to sort out is my exhaust. Got an apexi exhaust at the mo but want a nice rubble from it so rather than change it i might as well decat it. Looks like its gonna cost me more though! haha!!! We'll see what happens mate. Link to comment Share on other sites More sharing options...
mikeyb10supra Posted July 5, 2006 Share Posted July 5, 2006 I will take one mate....im in essex too so will come and collect, have you fitted any yet....are they a direct fit?....it wont be for a while though as the car is off the road waiting for some much needed cooling mods Link to comment Share on other sites More sharing options...
johnd-mkiv Posted July 5, 2006 Author Share Posted July 5, 2006 I will take one mate....im in essex too so will come and collect, have you fitted any yet....are they a direct fit?....it wont be for a while though as the car is off the road waiting for some much needed cooling mods no worries mate give me a shout when your ready, direct fit no cutting or messing around un bolt, bolt in jobby Link to comment Share on other sites More sharing options...
karl Posted July 5, 2006 Share Posted July 5, 2006 hi mate can u get them for the uk supra i think the flange is biger Link to comment Share on other sites More sharing options...
johnd-mkiv Posted July 5, 2006 Author Share Posted July 5, 2006 hi mate can u get them for the uk supra i think the flange is biger I can make them up but need one to copy Link to comment Share on other sites More sharing options...
Lewis Posted July 5, 2006 Share Posted July 5, 2006 You going to do the 2nd as well John? Link to comment Share on other sites More sharing options...
johnd-mkiv Posted July 5, 2006 Author Share Posted July 5, 2006 You going to do the 2nd as well John? going to look into whats involved when i make mine and ill see from there. I'll keep you updated;) was thinking along the lines of making one pipe that does both first and second in one Link to comment Share on other sites More sharing options...
Lewis Posted July 5, 2006 Share Posted July 5, 2006 going to look into whats involved when i make mine and ill see from there. I'll keep you updated;) was thinking along the lines of making one pipe that does both first and second in one seems a sound idea to me. Although tricky when MOT time comes knocking, would mean replacing both cats Link to comment Share on other sites More sharing options...
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