Here is my feedback. I have 10 years of experience managing an online community/forum so I am not talking completely out of my ass.
1. Improve the front page (when you go to columbusracing.com)
Right now when you visit as a guest (or even a member) it is confusing. You have some info about current events then a link to the forum, plus other utility links and the calendar.
There needs to be something to explain what Columbus Racing is about, how new members gain access, a clear navigation menu, etc.
2. Customize the look
With plenty free and decent looking vBulletin skins out there, we should have a design that is a little more car-centric. It would not take much to install one and have the graphic talent here modify the header/rest of the look to be CR specific. You can even keep the default skin and let users choose which one they want to use.
On that same note -- install a mobile skin. With many people accessing the site while out and about at meets, etc. it would make sense. Yes, you can browse CR as-is with little issues. But a mobile skin would be nice.
3. Re-organize the forum categories
While there are a lot of knowledgeable and nice folks on CR, there is also a lot of bickering. (I did not visit the site all winter and it was refreshing to get away.) But look at the forum itself -- "The Romper Room" and "The "Oven" where you need to "prepare to get burned" nearly take top precedent over all other categories.
This is how it should be (a rough suggestion):
-- General Car Discussion --
The Passing Lane
Meetings and Events
Sub Forum to Meetings ----> CR Track Days
The Parking Lot
Photos & Video
New Member Intros
Combine FAQ/Announcements/Ask Shao into one category then have the rest of the forum pretty much how it is.
4. Allow embedded video
It is very easy to allow users to post YouTube videos. It is safe (especially with the closed nature of the forum) and I have been allowing it for years on my forum with no issues.
5. Streamline the events
Do one CR car show a year, one CR rally a year, then your track days as usual. Keep the details clear and consistent and watch your events grow every year.