Injecting into intercooler outlet tube?
 

I have a bung on my intercooller outlet tube for my water injection. Is this a bad spot? Wouldn't it be better to have on the throttle body inlet? Seems to me like the water could pool down towards the intercooler.

So long as you have it post IC and post any serius bends you should be fine. also you need to start spraying abit later than most to ensure that the AIT is high enough to keep the water mix suspended in the incomming air.

At the throtle body would be most effective