I have a serious engine build coming up in the next few months ( 13BT Blueprint ) , i'm curious to see if a 14Bt or 15Bt crankshaft is the same size & fit as a 13BT ( i understand the 14 & 15's have a longer stroke ) ??? wondering if its possible to use the longer stroke to gain extra capicity and more torque ( custom length rods & piston combo to suit ). I don't know much about the 14 & 15B's full stop ! only seeking the turbo version as they are tougher built generally , ie; Forged steel cranks over hi-nodular cast .
