You could always volunteer to maintain the faq sections.
From my experiences with a wiki, there is subject matter that will not fit there because its format does not lend itself to giving information in a productive way. One area it fails at miserably is situations where one methodology that is pointed out will only fit about 2% of the whole of the subject it is trying to cover... and tuning falls in that category big time. I've come across this so many times in my limited experience to know now that no 2 cars are the same, and I'm sure Dave can attest to that.
I have read hundreds of manuals, documents, faqs and wiki's that try to teach people how to tune, and I have not yet seen one that succeeds at this in an over all way. Sure, between them all they give you an idea of what you should strive for, but none of them are specific to just that one vehicle... your own car.
Any of us can throw a document up saying change that and change this etc etc, and people will follow it blindly.... and end up with a car that doesn't run, and then the arguments start with comments like "Its works on my car, so it will work on yours if you weren't so stupid" type stuff. I can list several items to change initially just to get things started, and I haven't even got near the car yet which can change all of those settings just to get the thing to start.... so how can information like that be put in a wiki?
Finally, what about the cases where something that was posted on the wiki is wrong? Who will correct it and moderate it? We all know if someone posts a mistake up and someone corrects them on it, then the person that offers the correction is shot all to heck because the guys buddies jump all over him no matter how wrong he is, so the wiki will end up with the wrong stuff in it and it'll never get corrected.
I agree a wiki is nice and would be a nice feature for the site as a faq section, but there is certain topics that will not fit in a wiki and should be kept in a live breathing forum instead where people can work their own solution with help from others who are in the know.
This is going to open a huge can of worms as far as I'm concerned.
Fraser