Looks like I was dead on with my turbo guess
Also, just incase you guys aren't aware.
Turbos are a lot less harsh on motors than people think. One thinks "boost" and immediately thinks future problems. I think if someone would design a beefy set of rings for the 400ex and run a CP piston at about 8.5:1 or lower you could have one 400ex that would make mod'd 450's look retarded, and with the proper setup be reliable as can be
03' 400ex
B&M Oil cooler
Renthal bars
Air lid & Snorkel removed
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1995 Mustang Cobra
331 stroker, victor jr heads, TFS-R
MSD everything, 31 spline axles, auburn pro, and BOOST!