The Spontoon website posts "Speed Week" stories and art on a 30s racing theme each year at the end of August: Here's a contents page for the contributions:
http://spontoon.rootoon.com/SPwRacCn.html

We'd be happy to add more art and stories to the section!
The Spontoon Island website will celebrate "Speed Week" starting 24 August. The site would be happy to repost images of 1930s racing vehicles on a tropical island, including racing seaplanes, 30s motorcycle races, and similar subjects. Also welcome would be images of visitors watching the racing, locals managing the races, mechanics at work, & pilots.

Text stories set during the air races or the racing festival in this 1930s Pacific island setting are also welcome.

Rating is PG to (mild) Mature.

Your own original characters are welcome to visit the Speedweek festival. (Fan art of corporate-owned characters doesn't fit the setting.) Reposts of your previously-drawn art (that fits the theme) can be OK. You keep your copyright, and you may have credits and links to your own archive.

There's background information on this webpage:

http://spontoon.rootoon.com/SPwRacCQ.html

Questions are welcome.