haha, wow.
No, your turbo will not break. Blow off valves (bypass valves) are included with turbo kits and superchargers for a reason. When the throttle body is closed when letting off the gas during boost or when downshifting without rev matching, that air is diverted either into the downpipe or to the atmosphere to prevent this from happening. I honestly dont know anyone dumb enough to run a hack job turbo or supercharger kit without a BOV or bypass valve. It honestly would have to be a DIY job for somebody not to include one.
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"The CEG Nazi"
www.contour.org
1996 Ford Contour SE - Sold
3.0L V6 and Arizona Dyno Chip Turbo Kit
364 whp, 410 wtq @ 16 psi and only 4,700 rpms.
1999 Tropic Green SVT Contour - Bone stock and MINT