mehguy,
i am one of the folks who wrote the caffenol cookbook, i have been using caffenol c as my main developer for about 10 years now
and never really any problems. it is fun, easy and you can feel like a real mad scientist. that said, if you haven't ever processed film before
and you don't have the ingredients handy to make caffenol ( potency of the developer relies on using the right ingredients, some folks aren't able to find
the right-stuff so they use other stuff, and their film is ruined ) it might be better for you, to use something that at least as far as the developer is concerned
is fool proof. often times photo stores carry the line of sprint photochemical. it is what a lot of high schools and colleges use because it is reliable and easy to use
and they have starting times for nearly every film that is currently being made ...
i don't know of any table &c of starting point developing times for every film made with caffenol, maybe because consistency and potency depends on ingredients
and ingredients change no matter where you might be ... ...
i am not trying to push you away from using caffenol ( as i said, i have been using it for 10 years ) it might be better using something tried and true, rather than
( for some folks ) trial and error ...
good luck !
john