I've almost finished building the Iron Titan (by Tango Tek), but I guess I made the lava hole with the hoppers collecting the iron ingots too high. The problem is with the last platform, the one which takes the fallen iron golems and put them into lava: the water finishes into lava orizontally. How do I fix this? Does it has to be 4 blocks under the higher platform like Tango said? Can I use signs or something similar? Please help.
Pictures of your setup would help so we can see what you're asking about.
Not everybody is familiar with the Iron Titan and I'm pretty sure there have several versions over the years and this sounds like a part that could have changed and also isn't either integral or specific to the Titan so almost anybody might be able to help if you show what the problem is.
Last time I messed with an iron farm I had the lava held up by signs, so the drops didn't fall into the lava, and the water ran under the signs with hoppers at the far end. This meant that the water/lava could only be 2 blocks wide, I don't know if that's a problem with the massive numbers of iron golems that I'm sure the Titan produces.