Hey bro, so you're using the injectable Dbol by Geneza. Solid product. Not sure if you're the same guy, but we just had a conversation about this topic over at Juicedmuscle.com. I think that the injectable is a little "cleaner" than the oral and IME, it seems stronger. I'd say that 50mg injectable feels more like 70mg oral, but still no effect on appetite. It doesn't have to be processed by the liver to enter the blood stream. Missing the first pass, I think it's less harsh.
So dosing, I'd just use the same amount you would use orally. The half life is still really short, about 5 hours, so you will need to inject it at least every day. If you aren't experienced with dbol, 25mg would be fine. If you have have more experience, go with 1cc, 50mg ED