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it should work...
that is the same idea as a poweraid throttle body spacer that has a helix bore in it... and i know they work...
however, if you pay attention to the hp and speed on the dyno... you'll see that "before" and "after" are at different speeds... roughly 5-10mph difference... and depending on the revs, there could naturally be a 20hp difference b/n those speeds...
it just wasnt very clear... and they don't tell you the gear... at 90mph, we assume 4th, but third is feasible... why not do one run in one gear... and the next in a diff?
now, i am not saying that that is what they did... but they are possibilites... but products that spiral the airflow are known to increase airspeed, supercharger style...
and the idea of an intake that is polished to "smooth" airflow does so to decrease turbulence, not to "unswirl" the air...
if that was your train of thought...
swirly air would also mix better with nitrous... hmm..
my question is in the restriction it causes, moreso than if it works... it is pretty big... surface area wise, and it is in the intake... i dunno
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