Have A Belt Driven Whirlpool
No problems here with creating froth, not that one is actually trying.
Bobby Brady poured an entire carton of laundry detergent into the washing machine (or at least that is how it appears on television).
If it is suds you want, pick up some Tide (not HE), detergent and start with a normal dose, then keep adding more until you reach whatever suds level desired.
Generally speaking, froth is not a good indicator of cleaning action when it comes to detergents. It could be either you have hard water (which influences sudsing), and or a very dirty wash (ditto), combination of both, or simply whatever product you are using is designed *not* to create mounds of froth.
Tide, at least in the past will certianly get you there, but then you have the flip side, how to get all that foam out of your washer. Excess suds aren't good for the machine, especially it's pump, so wouldn't do this on a regular basis.