Originally posted by 1Sick_Puppy: Test was not done by Terry. It was done by somone as part of a seal test (crankshaft seal test). A solid lower pulley was installed in order to make viewing lower seal easier (diameter was not the same as well as slots milled in it to view crank seal area).
If this was a one off engineering "block" just to make sure the crank seal sealed - did they make sure it was more or less balanced? If they had cut non-symetrical viewing slots in it, when that puppy was spinning at 4000 - 7000 rpms it was going to be unbalanced as h@ll. While some people may risk running a crank with no torsional damping, I don't think anyone here would try and run an unbalanced crank (ie try and remove a harmonic balancer from a v8 and see how long it lasts).
