I build a ram, but the warheads do not go off ?
I haven't had problems with them, but sometimes(IDK if it was fixed) the warheads don't fully destroy themselves/each other when the explosion happens. Keep in mind they bypass shields, but are fairly weak and lack any grouping effect(they just chain-detonate).
There is one good use for them, though.
Consider this: they don't decloak you...
They're also easy to make.
Use copy+paste, and loot the pirate turrets!
We need a better cloaking system eventually...
(And some kind of variation of strength added to pirates, where you can locate areas with weaker pirates that have less backup, and start with those.)