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Originally Posted by PowerstrokeConverters
or maybe the blades are little more aggressive moving more air and that makes it whistle more......regardless, comparing both the WW "looks" like it would move more air, and  wants it to be quieter, of course.......imagine people test driving it and getting "annoyed" by a loud whistle 
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From what I have read the stock wheel gives better low end performance while the ww has eliminated turbo surge on some vehicles and might give more top end HP. I think the ww was stock on pre-99 turbos. I have not seen dyno curves of the two wheel types side by side so my understanding is gleaned from what has been discussed here and on other sites.
A dyno curve would help a lot !!! Anybody?
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Work rig - 2000 F250 7.3 4x4 3.73 auto, 285/75 Michelin ATX, hpx, zoodad, hutch mod, 4" mbrp, 6637, isspro 3 pod, Trucool, ATS ported shroud (someday).
Farm rig - 85 6.9 xl t18 4x4 3.73ls, 88k orig miles, zig-style ram air, electric fuel pump, soup bowl delete, manual 12v glow plugs, Battery isolators, KISS principle generously applied.
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