[quote=Isotope]
Be aware though, this is a HUGE explosion, the radius would engulf the whole ship, just the reaction fueling it would be confined to the front quarter.So realistically you would just see a giant explosion, nothing beyond that.
[/quote]

No, not a "HUGE" explosion. That'd be unfair- attaching FTL drives to a simple drone, and then warping it into coordinates near an enemy ship would do far too much damage. I think Monkeypants has a better idea- the result of that woul be debris flying off at high speeds in a single general direction, from what's essentially directional instant compression and implosion, which will then react to the force hitting the front stuff, and essentially just turning into debris. 

KeyGuy's FTL, if fired correctly, or rather, incorrectly enough, could destory the system behind it. Obviously, this is very unfair. I believe he edited that bit out.