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ok first ill give some info on both verts....both are 8"the coan was built for a W2 340 it has a negative fin angle(around 100-150 degree)5500stall behind my new combo stroker indy SB.
the ptc was built for a stroker BB +250 fin angle unported stator 5400stall behind the same combo as above.
the coan is 10yrs old been behind several combos the ptc is bacially new.i lost almost a full 10th in 60ft with the ptc bacially 1.5ths on the top with same mph and rpm trap(same slippage).i bought the ptc because i wanted to use NOS figured it should be tighter but dissapointed.



Was the PTC built by them for your new combo? Or was "the ptc was built for a stroker BB +250 fin angle" that someone elses combo?