I've built plenty of motorbike frames and helped a friend build a hot rod chassis. The advice I offer is:
- Get the geometry right by not deviating too much from a proven desigh
- Make yourself a jig, I have an adjustable steel one for bike frames, It doesn't have to be that strong just sturdy enough to hold the components in place. Despite what some people might have you believe the jig will not stop your frame twisting. It'll just spring when you release it (see below). A wooden frame to hold the main components would probably do for a one off car chassis.
- To stop your frame/chassis twisting and developing potentially lethal cracks at welds you must make all your preps/joints perfect. This means accurate cuts, and if you don't have the tooling, a lot of filing and grinding!
- If you can't weld, learn properly, or get someone who can to do it for you. Your life depends upon it.
Personally, I like the idea of a unique bike frame which is as much apart of the bike's styling as the engine, wheels and tank etc, and I love the feeling of stuffing Ducati's on a home made "bitsa"! :finger:
As for a car, in which the chassis is covered up, its a lot of work. I couldn't be arsed and bought a Dax! (tho I must admit if I were to build one it'd be more like a GD)
Good luck:thumb:
Rich