There are forums for pretty much anything car related on the net, whenever I see threads where people ask questions like "im getting "insert mod here" how much power will I gain?" All you need to do is DO A SEARCH and look for other members with similar mods (there's thousands of members on this forums alone, so you WILL find someone with similar mods) just look at their setups and your question will be answered.
And for those stupid "ED auto vs VS manual, who will win?" again *newsflash* no-one cares, so instead of making a thread, search the commodore forums, see what sort of times these cars run, and compare it to someone who has raced their car with similar mods.
General turbo related questions have been answered on these forums many times now or just use a normal search engine such as yahoo or google.
If you do a search and too many un-related threads come up, refine the search, most forums have different sections for different threads, so all you have to do is just search in that particular forum and more relevant threads will appear in your search.
From now on I will be deleting any threads without notice if I know it's easy to find the answer by doing a simple search. "CBF searching" isn't a good enough excuse, it's not hard to do.....and after trying all this if you still can't find the answer, make a thread

PS I'll add more tips to this thread in the future, if anyone else has any tips just post them up and i'll add them to this thread.