So the rear frame and roll bar are done, just some tidying and painting to finish.





I feel like I now need to go back over everything I've done and give it all a really good clean and consider my next move. My elaborate handbrake lever excess will need to go I think though as it leaves little room for the fuel lines.

New tank!

looking good there and it really feels good as you get jobs done and moving forwards,
Gary

I'm not 100% sure on this, but I seem to remember someone mentioning that the book design for the rear bolting of the rollbar was no longer acceptable at the IVA and that it had to be two bolts per rear stay. I may be wrong but double check.

Arfon

I was thinking about mentionin the same thing. When AshG had his IVA test, it was one of the first few. They said 1 bolt on each stay wasn't acceptable, he had to have at least 2. I don't know if this rule still exists or if people have gone through with one bolt.
I took my stays to the chassis by the floor and ended up using 4bolts per side. Prob overkill

There is no requirement for a roll bar so in my view they are just being a pain,but more is better and safer.

12.9 domed cap screws are available and look pretty.

Joy, I'll research it and report back. I can't see what difference it'll make as I'm sure the single high tensile m10 bolt is not the weakest part at those junctions.

Could I leave the roll bar off for the test?

If your not using it for your seatbelt mounts, I cant see why not

Arfon

Yes exactly,but make sure seat belt mounts conform to IVA requirements for height and strength etc.
Fairly sure that Westfield/Caterham had only one center bolt through bottom of roll hoop,so Haynes 4 bolt to me much safer.
The other thing that makes more sense(to Me)is to place rear stays on something more substantial like the diff mounts.