Roll cage bars going through firewalls,, how do you handle it? Options

[FourBlades]

When a roll cage bar/chassis tube goes through a firewall, what do you do?

Do you cut the hole close and then weld around it, use seam sealer, just live with a small gap?

I am trying to decide what to do with bars connecting the cage to the front and rear suspension points.

Thanks,

John

[rick 918-S]

When a roll cage bar/chassis tube goes through a firewall, what do you do?

Do you cut the hole close and then weld around it, use seam sealer, just live with a small gap?

I am trying to decide what to do with bars connecting the cage to the front and rear suspension points.

Thanks,

John

Use a lazer pointer to locate the position for the hole. There are more ways to do it than you could think of in an hour but I would start with a small hole to be sure I was lined up where I wanted the tube to pass through. Then once you have proper center for the hole on the firewall use a hole saw. You will likely need to tack a patch over the small hole you made so you have something to drill the centering bit into. Cut the hole slightly larger than your tube. If your racing follow the rule book. If your doing this for you and want a clean looking passage use a split peice of vacuum hose to fill the gap.

There will other ways explained her too I'm sure. Many ways to get this done cleanly.