There’s a lot of discussion in this AR thread specifically around 909 kicks, also refers to a soundonsound article that describes the technical architecture of the 909 kick:
If memory serves me right, pitch envelope on a triangle and some hipassed noise for the click. But read through and see.
From my own experimentations you quickly end up fine tuning pitch envelope release, amp envelope release, amount of applied pitch, base pitch etc to find the optimal thump for money. Then try to amplify that with whatever tools are at your disposal (bell curve boost filter etc)