Chassis strengthening

[spetz]

Just wondering, besides the obvious strut braces, roll cages and so on, how to strengthen a chassis?

More specifically spot welding, seam welding and so on?

I will be taking my car to a rolling shell soon enough so wondering what can be done, especially a DIY job?

[sivic]

yeah basically spot weld along all the chassis seams, and then you can use a special resin which is light yet rigid to fill in all the chassis tubing.
see if you can find some stuff on how a lot of the jap workshops do there track cars.

[aaronng]

Urethane foam filling.

[spetz]

Where can I get this filler from?

And does it make a big difference? Weight?

Spot welding, is that easy to do yourself?

[joyride]

http://www.weldingzone.net/s/spot_welding
its got alot of useful info

[Slow96GSR]

The foam can be bought online or at any hardware store. As to weight, well it's pretty light. Might be 3-5 pounds per cubic foot and that might be a little high.

[spetz]

Oh ok that is quite light
How does it work for sound deadener then?

What kind of areas would I be putting it in?

[sivic]

you put in the chassis rail tubing. of course you have to seal them all off with tape or you'll have a damn big mess lol

[spetz]

Oh you mean under the car??

[ewendc2r]

The foam is light as hell --

And if you are going to spot weld, plug weld instead (Drill the hole, the spot weld it :P)

My 2c

[spetz]

Is it easy to DIY at home??

[j3z3z]

have you thought of installing chassis braces underneath the car?