6 replies to this topic

[DGO129]

Hi all,

If anyone still reads this section - I acquired an unfinished early Zcars Busa mini which I am prepping for IVA - does anyone know what thickness aluminium Zcars used for the firewall. I can't find any specifics in the IVA blurb. I was thinking 2mm sheet would suffice?

Also any suggestions on collapsible steering columns - the "wearediminutive.com" setup looks elegant but I can't make out what components they used?

 

Cheers

[DeadSquare]

It was after was a saloon car fire in the mid 1960s, that the RAC immediately introduced a "Fire-wall" which became mandatory for club racing in the UK.  The scrutineers demanded that "Fire-Gaps" were filled with 1/16" steel if the car was of predominately steel construction.  Exotic cars with more than 25% aluminium, could use 10 gauge (Just over 1/8")  aluminium.

 

I remember at Brands Hatch, a furious row when a scrutineer refused to pass a car because there was no mention in the emergency regulation about Fibreglass construction.

[quagmire]

going to use 3mm ali on mine bit more difficult to work with but a lot more ridgid once its fitted i would have thought

[DGO129]

Thanks for responses - think I will up it to 3mm then

[Will_they_run_again]

i assume you are talking about behind the seats ?, mine had ( i binned it as it was rubbish and will be redoing it ) and others i have seen from them used a honeycomb aluminum panel with an access hatch in the middle.

[Painter man]

I have 4 mm in mine fitted with busa gen 2 it will be at mini fair 2026 on the 25th of this month if you want to pop see me on the fast lads stand thanks craig 07967 575286

[Ethel]

There must be way more variables

 

If you're not a chief constable, Google's AI says Locost builders use 1/8" ally plate & think IVA testers must see plenty of them.  Seems like overkill to me, unless it's load bearing. 1mm of ally was good enough to shoot rapids in before canoeists discovered HDPE