Precision Turbo and Engine Turbocharger Installation Recommendations - Manual (Page 5)

TURBOCHARGER CLEARENCE
Proper clearance around the turbocharger and any structural member of the vehicle is
crucial to the turbochargers longevity. Anytime a structural member of the vehicle comes
in contact with the turbo it can cause side loading. Side loading is when stresses are
placed on the outside of the turbocharger which may push, pull, or twist the turbocharger
which may cause the rotating group to crash into the housings.
1.
At least 1 inch of clearance should be maintained between the turbo and any
structural member of the vehicle to prevent side loading. This becomes even more
critical on high horsepower applications where chassis flex is more prevalent.
This also includes any body panels which may flex from the forces applied at
higher MPH.
2.
At least one flexible rubber style compressor discharge tube coupling should be
utilized. Compressor discharge tubes can act like a lever which can pull or twist
the compressor cover and cause side loading.
3.
If it is necessary to support the weight of the turbocharger it is best to do so by
supporting it from the turbine housing inlet flange or the center housing.
Mounting locations on the Precision Turbo large V-band (pro mod) style turbine
housings may also be utilized to support the weight of the turbocharger.