Is there anywhere with a chart that shows how much HP a different size pulley is worth? I'm looking for something like this:

Diameter +HP Mods Needed
3.8 0 Stock

Etc.

Trying to determine if I can run the 3.6" pulley with everything else in stock trim.

[Edit: Sorry for the poor formatting.]

There really is no set gouge to go by. Everyones car has differences when it comes to KR. The smaller the pulley the more KR you will get if you don't have supporting mods. Some people have crazy KR with the stock 3.8 and others are lucky enough to have minimal with a 3.25 with all other mods the same.

So to answer your question without scanning I'd say a 3.6 would be safe to run with a CAI, drilled tstat and cooler plugs. How much HP increase I couldn't tell you.

Herc, with the mods I have, I am looking at putting the pulley on soon. What kind of KR can I expect. I have not done the plugs or stat yet. Just wondering so when I scan it I know what I will be looking at.

It's hard to say. With your mods I'd expect 3-4 degrees of KR but maybe none. Only way to realy tell is to get it scanned.