I want to run my factory five racing Cobra kit car in the 150 mph class next year. I am going to start the roll cage and am having trouble figuring out the construction of it. I think it requires a 15/8" tubing 4point cage. I want to pass inspection when I get there as I live in Iowa, 1100 miles away.thanks for your help
Well the fortunate part is you have lots of time to submit and get approval if you are building your own.
You can contact Autopower and see if they have a roll bar for your car... theirs are approved for lots of racing organizations.
google roll bar or cage designs for your vehicle to see what's out there.
Going fast is addictive... :? :cheers:
First; this is not a SCTA question. The 150 club is USFRA only. I would run more than 4 point cage. Fiberglass body will disappear in case of a crash.
Moved to WoS section
Amen!
Never drive any faster than you're mentally prepared, and safety constructed, to crash, and that includes crashing violently. Stuff happens.
GW
Get a bike.
No roll cage required.
:cheers:
i have to travel 1100 miles one way, so i just want to have a safe car that is legal to run. i may just run the 130 class first and have some fun. thanks for your help, henry
Bird... I travel 1200, when I lived in Florida, it was 2100 so I know what your feeling. So the requirement is a minimum 4 point from an approved source.... basically....
Have you checked Factory Five to see if they have a 4 point rollbar? It's a fairly common addition for that kit... looks racier... Just needs to be 1 5/8 x .120 wall minimum... so functional not just for show. The internet is probably your friend.... and make contact with USFRA... they are friendly folks that want you to be able to race.
I just noticed you were thinking 130 as well, your open top car requires a 4 point for 130 Club.... so get working on that Roll bar.
Stainless brings up a great point to check with Factory 5 as they likely have what you need or can give their recommendation as to who likely would.
You might also try getting ahold of Tom Burkland as he is a Tech inspector for USFRA and is a great resource as to driver safety.
He will certainly have some great ideas on what you need.
Good luck, have fun and be safe!!
1-5/8" minimum is compliance.
To prevent cage collapse (or something intruding into driver space), going up to 1-3/4" is a huge improvement in stiffness (resistance to bending force).
I wrote an Excel spreadsheet to solve this. The math (assuming the same material and wall thickness):
1-3/4" is 27% stiffer than 1-5/8", with only an 8% weight penalty.
. . . and weight can be your friend.
You may not believe this but when I was responsible for making the timing tags for the SCTA I would do replacements if I could verify the entry name, number. class, date, and speed for a fee to the SCTA. A person wanted his uncles tag replaced for a 427 Cobra that ran in the late 60's he was sure at a speed of 175. I was able to research and found the speed to be 139 mph....I never heard back from him...I'm guessing the uncle had fudged just a wee bit in the telling of his story going to Bonneville...As another point I don't think the USFRA does Timing Tags