I can't speak for the methodology used but check out the bottom of this link for some performance testing done with the new Tri-Y's.
http://forums.performanceyears.com/g...11&m=850109068
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71 Formula 433, Splayed cap 400 block, 4" stroke Scat forged crank, 6.8 Eagle rods, custom Autotec pistons. SD 295 KRE D ports, Old faithful hybrid roller, Torker II, Holley Sniper Stealth, Tribal Tubes, TKO 600, 3.73 Eaton posi.
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