I do not use that combination. I use pyrocat-HD for pop or DDX and JandC 200 and Efke PL100. I get plenty of contrast with the Efke but the JandC is a little on the un contrasty side in the development arena, so I get the contrast at the scene by shooting in really contrasty light. I have used the print developer to process copy negs and the contrast was a PIA to control. As was said it will produce contrast that goes off the charts.
For POP, the shortest exposure time I have gotten is 13 minutes, but I cook the hell out of the paper and then fix before toning in KRST. Good luck.