FIA Historic Rules on Rubber doughnuts

[over steer]

The initial message was deleted from this topic on 13 September 2024 at 08:58

[ChevronB19]

over steer said:

Hi Guys;

I was wondering if anyone had any idea if converting our 62 Lotus 23B from rubber doughnuts to CV joints would be compliant with FIA historic regs?

Thanks in advance.

I don’t, but best thing to do would be to check with an HSCC eligibility scrutineer.

[HustleRussell]

Such conversions are prohibited in Historic Formula Ford and also Formula Junior cars of the same period so I suspect it wouldn't be permissible.

[Carnage]

They’re not allowed, no.

Have to be as homologated in all respects.

If you’re asking because you have a Hewland MK9 box, you can get output shafts that allow you to fit donuts from PDS Racing.

They are beautifully made but not cheap.

Edited by Carnage on Monday 13th July 14:02

[over steer]

The only motivation was greater reliability. Thanks for the information, will proceed accordingly.

[HustleRussell]

over steer said:

The only motivation was greater reliability. Thanks for the information, will proceed accordingly.

It's worth looking into 'doughnut savers' or whatever they're officially called- devices which can be used in combination with doughnuts to stop the driveshaft from flailing about in the event of a failure.

[over steer]

HustleRussell said:

It's worth looking into 'doughnut savers' or whatever they're officially called- devices which can be used in combination with doughnuts to stop the driveshaft from flailing about in the event of a failure.

Thanks for the tip, will look into these.

[ChevronB19]

And vaguely on topic, I noticed these today if you’re interested (not my advert).

https://www.racecarsdirect.com/Advert/Details/1145...

[over steer]

ChevronB19 said:

And vaguely on topic, I noticed these today if you’re interested (not my advert).

https://www.racecarsdirect.com/Advert/Details/1145...

Nice! Ours is trimmed in red though as that goes better with its colour scheme: https://www.instagram.com/p/BI5han-gbiQXiECnFW7DH2...

On the hunt for an Ali bodied Lotus XI though and those would be perfect for it.