Depends on the scenario, a clever captain could position his boat in a way to avoid detection and then fire a slow running torpedo and clear the datum at best speed. It's harder to do in a diesel than in a nuc I'd say but probably still possible.
However, if this is in open water, then the Kilo's dead anyway, they're primarily coastal boats, they can hide in the shallows, come out...fire...then hide again, the sonar condictions in the shallows are a little bit tougher than open water I think, so it'd be slightly easier to hide, plus you could use natural landmarks like coves and inlets, places where a nuclear boat can't go.
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