captint Posted January 31, 2007 Share Posted January 31, 2007 I should know, but don't, whats the point of test pipes? Quote Link to comment Share on other sites More sharing options...
Stew Posted January 31, 2007 Share Posted January 31, 2007 What the hell are test pipes? Quote Link to comment Share on other sites More sharing options...
Guest prescience Posted January 31, 2007 Share Posted January 31, 2007 No cats hence less restricted flow and with the engine being in essence a pump, in theory more power (but with the Z's ECU ......). Will also be much louder and non-resonated sound very raspy. Will also need a method (non-foulers) of 'fooling' the 02 sensors because otherwise you will get a CEL due to the exhaust gas chemistry. No point N/A, little point S/C and good benefit ST or TT Quote Link to comment Share on other sites More sharing options...
Stew Posted January 31, 2007 Share Posted January 31, 2007 So is this like decat pipes then? Quote Link to comment Share on other sites More sharing options...
captint Posted January 31, 2007 Author Share Posted January 31, 2007 So this is a straight through solution, is that a bit against the law? Would HF cats suffice or would they cause too much back pressure Quote Link to comment Share on other sites More sharing options...
Guest prescience Posted January 31, 2007 Share Posted January 31, 2007 So is this like decat pipes then? They are one and the same They are illegal and will fail the MoT emissions test. For S/C, HF cats are perfect, a little bit of back pressure helps IMO, for ST/TT you want to minimise back pressure altogether so HF with ST/TT is not a great option - could tip a borderline tune over the edge Quote Link to comment Share on other sites More sharing options...
captint Posted January 31, 2007 Author Share Posted January 31, 2007 Poo, how do you get round this without becoming a law breaker? Would True dual and HF be ok? Quote Link to comment Share on other sites More sharing options...
Guest prescience Posted January 31, 2007 Share Posted January 31, 2007 Poo, how do you get round this without becoming a law breaker? Would True dual and HF be ok? Of course Quote Link to comment Share on other sites More sharing options...
Ian Posted January 31, 2007 Share Posted January 31, 2007 Ive got decat pipes fitted, ill post a video later if you want hear how they sound Quote Link to comment Share on other sites More sharing options...
captint Posted January 31, 2007 Author Share Posted January 31, 2007 Poo, how do you get round this without becoming a law breaker? Would True dual and HF be ok? Of course Yey Quote Link to comment Share on other sites More sharing options...
StephenG Posted February 2, 2007 Share Posted February 2, 2007 Poo, how do you get round this without becoming a law breaker? Would True dual and HF be ok? Of course That's what I've got Quote Link to comment Share on other sites More sharing options...
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