C4 set at a longer time does not increase the blast radius of the C4, it simply makes defusing it much more unlikely and makes the distinctive beeping almost silent. As for being "more powerful" I'm not sure what you mean. Longer set C4 = Unlikely chance of defuse.
I think he was referring to: C4 set at a longer time does not increase the blast radius of the C4 when he meant by more powerful.
Currently doing a test with Distance. So far, a distance of 750 at 45 seconds makes you lose 49-51 HP roughly. Going to test it next with 2 out of 6 wires failing, and edit this post appropriately. NOTE: I'm doing this in single player alone. EDIT: 2 of 6 wires at 1:05 still did 50 damage. Going to try 2 minutes at the same distance, and if it stays the same then I'm going to leave it concluded that it doesn't particularly matter. 4 at most. 3 of 6 was the same thing, testing 4 of 6 currently. 4 of 6...same thing. Time doesn't matter unless you don't want people defusing it.
Might be our server setting then, because I distinctly remember the in-game guide mentioning longer c4 = bigger blast.
We have the default C4. From the in-game tips: Doesn't mention range. I also checked the code and its a preset range.
Hmm I stand corrected then. It must have been on the previous community I was part of. Weird that it's on a wiki for TTT though... haha