sure why not. i think the only thing you can't post is porn. i dont think nudity is allowed either but tastefully done implied nudes is probably ok. i would check the forum rules for clarification...i think its outlined somewhere in there.
i also wouldn't post other photographer's work without proper credit being given. that's just a respect thing.
but bring on the cars man!
5D3, 5D2, 5DC, sigma 15mm Fish, 24mm TSE, 35mm F1.4L, 85mm F1.8, 24-70mm F2.8L, 70-200mm F2.8L, 580EX, 580EX2, 600EXRT