Simon K Posted July 10, 2012 Share Posted July 10, 2012 Hi all, I have a 96 JDM TT auto. Ive decatted the second CAT with a decat pipe, but kept the front CAT. I did this over 6 years ago as as I wanted BPU but didnt want to complete ruin the reliablility. Well, over time the front CAT pipe flexi joints are blown and I need either a replaced unit ( toyota ), or buy a second hand one ( which is becoming difficult to find ), or I go and decat the front CAT. Now, from memory, back in the early days when I brought the car, 2004, I never decatted the front CAT due to boost creep. If you did you needed to buy some restrictor ring. Is this still correct ? SO, what do I need if I decat the front CAT now ?? What psi increase will I get ?? any issues ?? PErsonally I would rather just get a second hand front CAT. Anyone got one ? Becoming an issue now, as car is off the road and Im using 150bhp car, and its slow :-) SBK Quote Link to comment Share on other sites More sharing options...
R Black Posted July 10, 2012 Share Posted July 10, 2012 Sorry to hear you have this problem, yes you will need a restrictor ring, 1/1.1/1.2 bar, traders on here sell them, if memory serves, ideally you willalso need an uprated fuel pump ((walbro) a good condition ic, cooler spark plugs, fcd & a cat back exhaust, I'm assuming you have some of these already. - - - Updated - - - Sorry to hear you have this problem, yes you will need a restrictor ring, 1/1.1/1.2 bar, traders on here sell them, if memory serves, ideally you willalso need an uprated fuel pump ((walbro) a good condition ic, cooler spark plugs, fcd & a cat back exhaust, I'm assuming you have some of these already. Quote Link to comment Share on other sites More sharing options...
listy Posted July 10, 2012 Share Posted July 10, 2012 As above. If you are really worried about boost creep, either get a 1bar restriction ring and a boost controller set to 1.2bar, or get a 0.8 bar restrictor ring. Quote Link to comment Share on other sites More sharing options...
Nic Posted July 10, 2012 Share Posted July 10, 2012 http://www.mkivsupra.net/vbb/showthread.php?35944-Decat Quote Link to comment Share on other sites More sharing options...
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