Your saying i can go to 4.0ghz without water cooling?
I know how far the e8400 can OC to but with my cooling how far will it be able to OC on stable?
Possibly but I can't tell you for sure. You may go a little higher or much lower. I'm just saying that I've seen other people claim ~4.0ghz with good air coolers. But I don't know exactly how good your cooler is and I don't know how good your chip will be. Every chip's OC ability varies (sometimes greatly).