Ignition delay times (IDT) of small hydrocarbons a elevated pressures provide a valuable constraint for the refinement of the core small-hydrocarbon sub-mechanisms used in all combustion kinetics. Current knowledge of these core mechanisms is based largely on low-pressure data, with only limited high-pressure data available. To remedy this, the present study focuses on ignition delay times in methane, ethylene, propene and their blends at elevated pressures. IDT measurements were performed in 4% O-2, balance Ar mixtures, over the temperature range of 950-1800 K, at pressures of 14-60 am and equivalence ratios of 1 and 2. IDT was determined from recorded sidewall pressure, OH* emission measurements and fuel time-histories measured using laser absorption a 3.39 mu m. These measurements extend the test conditions of earlier studies, with the advantage that they have all been performed a similar conditions and with the same facility and should provide a uniform set of kinetics targets for the evaluation of core small-hydrocarbon mechanisms. This dataset also allowed the temperature variation of the pressure and equivalence ratio scaling for methane and ethylene IDT to be investigated.