233bhp at 1.4 bar is abit low compared to most ! depends how its tuned i supose, maybe mapped very safely ?
Anyway to answer your question. mid 13s shouldnt be a problem. Im running a td04 at 1.2 bar and did a 13.6 at 106mph on toyo T1r road tyres (worn aswell) and my suspention is alot softer, stock shocks with tein springs.
Did to a 108 terminal but messed start up so was only a 13.8.
So depending on tyre spec, Pressure, suspention setup and the rest of it. You should defo be in the 13s and should be in the mid to low times. Driver dependant ofcourse.