I'm not too familiar with the Trac 14, but as a general rule of thumb, I would say certainly keep the shrouds tight enough so that there is no chance of the mast disengaging from the step in the event of a capsize. The reason to allow some looseness in the shrouds is so that the mast can rotate. Also, on boats that require a lot of mast rake (like the Hobie 14 and 17) loose shrouds allow the mast to stand more upright when sailing downwind.

My suggestion- make the shrouds loose enough so that the mast can freely rotate, but tight enough so that the mast doesn't bang around in chop.

sm