Something different, Let me know what you think.

[springer-]

The forum software makes it easy to add info to the site without having to write a webpage every time and modify all the links etc. I am a member of several vBulletin based forums and have created many technical threads. I plan on adding a Tech articles section and reposting all the threads I have written on our site. Since they are already on vB forums it will be simple to bring them over. I also plan to have a customer support forum that allows guest posting, no membership needed. All submitted threads will require moderation.

We have 3 webcams at the shop and I would like to integrate them into the site as well.
Right now the webcam links take you away from the site to the cam. This becomes important when we want to sell advertising. The business ports heads, it's a performance upgrade and we get lots of people watching the webcams. We want them watching the cams with the ads on the page too. The forum software made the ads very easy to implement.

The forum software also makes it easy to organize the site. Right now the "dyno" section barely shows more than pictures. With the forum software it will allow us to easily give better descriptions of the builds along with posted pictures. And it allows us to easily add new dyno sheet with a simple post to that forum.

And finally, it was easier to buy the license and build the site than it has been to code it all from scratch.