spiderpigcity Posted January 27, 2008 Share Posted January 27, 2008 just a quick one how do i tell if my first cat is decat. i am j spec with uk turbos. i can see a sensor going into the exhaust under the drivers floor but i think that is the second cat. regards matt Quote Link to comment Share on other sites More sharing options...
Jake Posted January 27, 2008 Share Posted January 27, 2008 A decat is just a straight through pipe - the same round shape and same diameter along its length. A cat is a very different shape - they're a bulbous looking thing. Or are you wondering if your first cat has been gutted to convert it into a decat? In which case removing it and looking inside would be the only way I can think of. Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 :search:hi, i am trying to find the first decat on my car that the seller told me was done. i can find the second one that is standard cat but not the first. anyway i have taken some pics, could you guys point out to me what i am looking for. i can only find one exhaust manifold, not two like on the other pictures of tt supras. regards matt Quote Link to comment Share on other sites More sharing options...
Steve Posted January 27, 2008 Share Posted January 27, 2008 The 4th pic looks like the 1st CAT pipe to me. Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 just nipping out in the dark like a plonker to take some more pics Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 27, 2008 Share Posted January 27, 2008 The 4th pic looks like the 1st CAT pipe to me. yep and on the third pic in full size you can see it just to the left of the strut brace mounting....inbetween this and the brake fluid reservoir (but obviously a lot lower down IRL) Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 27, 2008 Share Posted January 27, 2008 Also on the third pic at the rear of the turbos there is a blanked off pipe and some others with no hoses on the solid thin pipes............its all part of the sequential system i think but it may be worth asking for advice on here...... Quote Link to comment Share on other sites More sharing options...
Steve Posted January 27, 2008 Share Posted January 27, 2008 yep and on the third pic in full size you can see it just to the left of the strut brace mounting....inbetween this and the brake fluid reservoir (but obviously a lot lower down IRL) Yep you are right Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 i can only see 1 turbo and 1 manifold ? maybe im been stupid Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 below turbo above where exhuast starts Quote Link to comment Share on other sites More sharing options...
Steve Posted January 27, 2008 Share Posted January 27, 2008 What exactly are you trying to find? You definitely have the first cat pipe still inplace. Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 anyopne got any pics so i know what im looking for? thanks matt Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 27, 2008 Share Posted January 27, 2008 below turbo above where exhuast starts there will be a turbo up and left, AND up and right of this........ Quote Link to comment Share on other sites More sharing options...
Steviekid Posted January 27, 2008 Share Posted January 27, 2008 Also on the third pic at the rear of the turbos there is a blanked off pipe and some others with no hoses on the solid thin pipes............its all part of the sequential system i think but it may be worth asking for advice on here...... Yeah, all the pipes from your EGBV are missing. Someone correct me if I'm wrong but surely any pressure created by the pressure tank will be dumped to atmosphere and therefore the valve will never open. Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 the guy i bought it off told me it had 1st decat. he told me it has uk turbos and hks intercooler aswell. the intercooler is hks. dont know ho to check turbos? maybe he means that they have knocked the cat out of the first one then otherwise there would be a through pipe instead. am i right. second cat is lower down under drivers part of floor is that right? the only reason i ask is that sometimes i am fcd when reaching 1 bar. most times boost at 0.9 bar. not a lot happens till 4000rpm then it goes mental and there is loads of power. my mate went in it yesterday and said it was a lot quicker than his tt. i am just trying to find out what mods have been done before i spend any more money. thanks matt Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 it has gpt a hks bov on it if that helps Quote Link to comment Share on other sites More sharing options...
Steve Posted January 27, 2008 Share Posted January 27, 2008 Well the 1st cat pipe is still in place (unless the internals have been removed), i beleive UK turbos have a 4 bolt design rather than the J spec 3 bolt design (dont quote me on that, cant remember). The 2nd cat pipe joins onto the 1st and goes under the drivers floor. Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 27, 2008 Share Posted January 27, 2008 Yeah, all the pipes from your EGBV are missing. Someone correct me if I'm wrong but surely any pressure created by the pressure tank will be dumped to atmosphere and therefore the valve will never open. not sure......... the only reason i ask is that sometimes i am fcd when reaching 1 bar. most times boost at 0.9 bar. not a lot happens till 4000rpm then it goes mental and there is loads of power. but this suggests its just causing the car to run with the turbos in parallel......... Quote Link to comment Share on other sites More sharing options...
Steve Posted January 27, 2008 Share Posted January 27, 2008 not sure......... but this suggests its just causing the car to run with the turbos in parallel......... Yeah could be TTC mode... Quote Link to comment Share on other sites More sharing options...
Steviekid Posted January 27, 2008 Share Posted January 27, 2008 You can't see any of the pipework relevant to running in TTC. I would get the EGBV pipework sorted as soon as possible to stop unnecessary strain being put on turbo 2. I'd also block off the pressure dump line from your original wastegate VSV before you get any crap being sucked into your engine. Quote Link to comment Share on other sites More sharing options...
Steviekid Posted January 27, 2008 Share Posted January 27, 2008 Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 right then, i have just jack the car up. the only cat on the car is the one under the turbo and finishes just before the pedal area. there is then a pipe from the first cat all the way along to the back box and thats it. does this help? Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 just to confirm. di all the ones where you have put sort these, do they all joint together or do they lead off somewhere else? and the one that says block this, is that the blue silicone tube leading to the black pipe. i presume you mean block the black pipe? thanks for the help regards matt Quote Link to comment Share on other sites More sharing options...
Homer Posted January 27, 2008 Share Posted January 27, 2008 right then, i have just jack the car up. the only cat on the car is the one under the turbo and finishes just before the pedal area. there is then a pipe from the first cat all the way along to the back box and thats it. does this help? You have the first cat still in place, thats 100% confirmed The 2nd cat sits just underneath the drivers footwell on a pipe about 3 foot long. If's it's a straight tube then it's had a decat pipe fitted, if it has a fat blob (worse description ever? ) someway down it, the 2nd cat is still in place. The stock 2nd cat pipe is also slightly flattened rather than a perfect circular shape Quote Link to comment Share on other sites More sharing options...
spiderpigcity Posted January 27, 2008 Author Share Posted January 27, 2008 i have the first cat on but no second cat. the guy i bought it off said i had 1st decat. im wondering if he got mixed up. it had mot last week so i wonder if it was full decat and then they put 1st cat in to pass mot. rest is full hks system any thoughts would this cause slow spool up on turbo1 cause at 4000 rpm it goes ballistic. thanks matt Quote Link to comment Share on other sites More sharing options...
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