L4V15 Posted October 24, 2012 Share Posted October 24, 2012 Hi chaps. My 350z is currently in having a true dual custom exhaust built. Spoke to the exhaust specialist in there today and he was talking to me about these vortex race flow and ecoflow boxes that they can supply and fit. Are there any exhaust specialists on here that can explain why having a spiral in an exhaust system would cause suction through the system and eliminate any back pressure? He claims that he has tried and tested them and they vastly improve torque, horsepower and MPG way more than any exhaust system and even more than a cat bypass. Easily noticeable gains. Do I go for it and give it a try or is it going to be a waste of money. He's also offering me two sports cats for £200 more. Should I do that instead or is that likely to sound horrible and loud and cause warning lights to come on? Hoping somebody can talk from experience on the Vortex exhausts. All opinions welcome please. Here's the Vortex website http://www.vortex-performance-exhausts.co.uk Steve Quote Link to comment Share on other sites More sharing options...
DannyBoy Posted October 24, 2012 Share Posted October 24, 2012 I've heard of these and my gut reaction is that if they were really as good as they claim to be, everyone would have them. From an aerodynamic perspective (coming form an ex-pilot) I can't personally see how their claims can be true, but then I'm not an exhaust expert. the other thing to bear in mind is that nothing will produce any gains on a Zed without a remap. The high-flow cats route is much more tried and tested, and will produce small gains with a remap. I have HFCs and havn't had issues with warning lights, but it will obviously make the exhaust a little louder, but not stupid. DB Quote Link to comment Share on other sites More sharing options...
L4V15 Posted October 24, 2012 Author Share Posted October 24, 2012 Thanks for that response. Very true about the remap. So I would need to cough up another £300 or more to see gains anyway. I just can't see how it could give more gains than any other free flowing system. Exhaust gases can only be pumped from the engine so fast surely? Although he did say that Formula Ford are using them as well as various rally drivers. Quote Link to comment Share on other sites More sharing options...
evilscorp Posted October 24, 2012 Share Posted October 24, 2012 When he says vastly improves performace if he means 1-2hp mabe but anything more I would say bollocks. Pipe length, diameter and the number of bends will effect performance much more than some groves cut in a small area of a long exhaust system. Quote Link to comment Share on other sites More sharing options...
evilscorp Posted October 24, 2012 Share Posted October 24, 2012 making pish claims since 2012 :-\ Quote Link to comment Share on other sites More sharing options...
L4V15 Posted October 24, 2012 Author Share Posted October 24, 2012 Hmm, ok well I think thats helped confirm to me that it's not worth the money. Thanks chaps Quote Link to comment Share on other sites More sharing options...
Dblock Posted October 24, 2012 Share Posted October 24, 2012 If they could fit it not charge you unless 1. it sounded great or 2. made some gains that would be awesome but I very much doubt that. Quote Link to comment Share on other sites More sharing options...
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