pathfinder 1e – Is there an action cost for a Kinetecist when using Metakinesis?

Then, the kinetecistas can use the metakinesis to affect their explosions as if they were using an associated metamagic feat. Metamagic feats sometimes modify the action required to use the associated spell (ie, standard action -> full round).

Does promoting metakinesis, for example, actually change the time it takes to use a kinetic explosion? Or is it still a standard action?