It's clearly pointless to search the forums for words like "I", "the", "in", etc. -- those words are too common to be useful in a search -- so I guess I can see why the forum software simply refuses to search for words with fewer than three characters.
But not all short words are common pronouns, articles, and prepositions. Especially on this particular forum, users are likely to want to search for words like F1, 12C, P1, 650, 570, GT3, Can Am, SLR, Spa, etc. -- and NONE of those searches are allowed.
So would it be possible to modify the search function to allow those words?
1994 NSX - Brooklands Green with 300K+ miles
2012 12C - Racing Green with fewer miles (but still 3rd-highest USA, 13th-highest worldwide)