Quote:
Originally Posted by Teseo
Or abs plastic?
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In my experience ABS plastic is basically junk. It is hugely temp sensitive, (brittle when cold, saggy when hot) and wears away quickly. I've built a bunch of splitters for time attack cars as well as a bunch of club racers. Ideally you are looking for a lightweight core with a stiff and tough outer layer. We have used Roacell foam, honeycomb. And end grain balsa for the core, all pretty successfully. However, for the guys on a budget, marine quality plywood is pretty much amazing. It is tough, light and durable. As a bonus, if you do rip it off somehow, it won't destroy the bottom of your car. (Please don't use aluminum plate, as it is heavy and dangerous)
3/8" thickness is usually what I use.
I know that plywood isn't very sexy, but is light, stiff, and inexpensive.
Don't use the junk from your local hardware store, get real hardwood ply, with at least 5 layers. It is often referred to by the brand name "multiply "