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Message: <blockquote data-quote="lchan" data-source="post: 279548" data-attributes="member: 11684">i'm still supraise these stuff are still in the market with my first hearing of cyclone some 15 years ago. I generally do not believe in them, but i do not doubt your experience because i personally have never tried them. However because we live in an age of science and technology plus our general and increasing urge to find reasonings behind experience on what we hear, see and feel, I find the statements claimed by manufacturer of such devices are rediculous to most extend.I dont see the benefit of such product located before the throttle body. Air is an element like water that can be manipulated with ease. What ever vortex generated by the device will be cancelled by the throlle body flaps. I guess this is why car manufacturers do into great lengths in improving designs are the cylinder head and the intake manifolds. Eg. Cylinder heads that swirls air, Variable intake manifolds, tumble flaps, etc. all to improve air/fuel mixture which in turns improve efficiency of the engineBut none has been seen before the throttle bodies, other then optimising diameter for velocity flow and designing resonance box (a separate theory on effects of sound frequncy and pulsation effects of a 4 stroke engine). Based on what i know (lacking in most areas), the most like benefit would be to have this cyclone thingy placed after the throttle body, which i dont think its possible. It is just claims like 20bhp gain and quieter idle with hybrid like consumption just turns me off. Plus, the test done are very subjective unless they follow ISO/SAE/ASME standards of some sort. But if you do a dyno, make sure it done on the same dyno, on the same day with proper compensation settings with runs without the cyclone and runs with it.</blockquote>

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