I want to replace the plywood firewall on my 24 Hack with a solid wood one. Would like a picture or drawing of a firewall showing typical board assembly/orientation. Any help is appreciated. Thanks. Gary
Problem with custom made bodies are they are all different as to height width and the motor opening best remove the one you have and copy it
A solid wood firewall would need pieces of boards glued or spliced to be stronger than modern multi-plywood, which won't warp either. My 1919 aftermarket T body had original solid wood, glued in pieces. But over the years soft wood added, so it was very weak and fell apart.
Made new firewall using quality Baltic birch 7 ply and it is really strong. Used the old parts for pattern.
Came out fine.
Thanks. I don't need specifics on dimensions. Just need an idea on how boards are positioned for splicing to minimize warping.
Gary, on our Canadian sourced cars, the wooden firewalls were all three ply. The core of the wall was made up of random width boards with the grain running from top to bottom. There were thinner plies on the outer faces, with the grain naturally running horizontally. They were never made with just boards running either way.
Today's multi ply panels are much stronger and more stable.If you must have the board look, just score lines in the outer ply layers, I would suggest with the grain vertical.
Hope this helps.
Allan from down under.
Any splicing you do is going to be weaker than a solid piece of plywood. Like Allan states, the plywood nowadays is much stronger. Go to a Woodcrafters and they should have what you need. Not the cheap stuff you find at Menards or Home Depot.
OK Thanks for the input guys. Sounds best just keep the firewall I already have.