I did a little searching and really didnt find what I was looking for or wanted to know. So Im just going to ask whats the BEST and biggest hp motor that I can fit in a H9 Ultimate ? I was thinking something along the lines of a 4cly ? from 3W or does DA make a nice motor for this? sorry for asking but im somewhat new to Gas.

If you are just starting out in gas I would go a little smaller. Try a Hangar 9 33% Edge with a ZDZ80. This is an awesome larger gas set up to start with.

This has been discussed before. Here's the link: [link=http://www.rcuniverse.com/forum/m_3018106/anchors_3018106/mpage_1/key_hangar%252Cultimate/anchor/tm.htm#3018106]RC Universe topic of engine for H9 Ultimate[/link]

I have had G-62s and stuff like that way back in the day when they where the sheet...but I have not had anything like todays power. Like i've had/flown the byron p-51 and a 1/4 scale T-6 etc.

To respond directly to you question....
We have 2 H-9 Ulti's, both powered by ZDZ-210 twins. PLENTY-O-POWER!!! They will go vertical as long as you want to point them upward. 'nough said.