Guest anand Posted September 9, 2006 Share Posted September 9, 2006 hi own jap spec 2jz-gte .i found single cat like to replace with similar dia pipe in place and replace factory fitted twin end cans (two)with blitz twins, what extent this mods will increase the boost,do i need to go for FCD & RESTRICTOR RINGS & BIGGER FUEL PUMPS ? as of now i would like to add iridium IK-22 PLUGS ,any further suggestions please Link to comment Share on other sites More sharing options...
Guru Posted September 9, 2006 Share Posted September 9, 2006 So you have removed one cat but not the other? You will need a FCD and a restrictor ring to control, the boost properly. However, the other cat will have to go first. THis would allow you up to a reasonable 1.2bar safely but I would aid fuelling by getting a Walbro and colder plugs. Do a search on "BPU" in the technical archive and you should find a wealth of resources to read Link to comment Share on other sites More sharing options...
Guest anand Posted September 9, 2006 Share Posted September 9, 2006 hi there is only one cat ? Link to comment Share on other sites More sharing options...
D8MOA Posted September 9, 2006 Share Posted September 9, 2006 supras have 2 cats,which 1 have you replased? Link to comment Share on other sites More sharing options...
Guest anand Posted September 9, 2006 Share Posted September 9, 2006 this is a ajz-gte toyota aristo ,jap-spec,after the manifold ,yhere is a sensor and a cat,splits into two then i found two cans hope they are just expansion boxes as they are lengthy ,each one is 20 inches and followed by two end cans,didi i miss the second cat ? Link to comment Share on other sites More sharing options...
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