Tubes in Frontrunners?

[Camaro2191]

I’ve been building my car for the last 4 years or so.  I’ve been to ECTA events, but this will be the first time at Bville and the SCTA/BNI rulebook.  I was going through the rule book one more time with a fine toothed comb and stumbled upon Rule 2.F regarding tubes.
 
I’m running a 3rd gen Camaro in C/Gas Coupe – record is in the 240MPH range.
 
I’m running a fully welded steel wheel with Goodyear 1964 and 1966 frontrunners.  I currently have it set up without tube (steel stem and cap).  I called Shelby in Las Vegas and they suggested that I not use a tube but the tire does not say tubeless.  Is a tube required for the SCTA/BNI rules (the language says “except for racing tires expressly designed for use without tubes”)?  If not, is there any benefit to adding a tube? I don’t have any issues with leakdown. It seems like if something were to puncture the tire carcass, a tube isn’t going to add any meaningful safety factor.  Any thoughts?
 

[saltracer1]

I currently run tubeless front runners and have passed tech three times. Now my car is less than 200mph car, but I don't think that matters. Phil

[jimmy six]

Not positive at 240 but Al Teague told me his tubes moved out into the tire and off the rims at 350-380. I use tubes in mine and purchase motorcycle ones with the metal stems. They have center and off-center stems. Make sure they are not old. When I buy new ones I remove them from the box, check for cracking, and inflate them.

The reason I run tubes in my GY's is they leak thru the side wall...Everyone of them has done this. With certain rims i use it was hard to install tubes but I've figured a way to install them.

[Stainless1]

I would run tubeless... especially since Goodyear suggests it.... it is surprising how much friction can be generated inside a tubed tire.... High pressure and lots of talc will minimize the heat if you decide to go that way. 
Talc from California causes cancer so be careful   

[Seldom Seen Slim]

I mis-read that, Stainless, and was laughing for a while.  I thought you said:

"TALK from California causes cancer."

I knew them Californions were weird about cancer causing stuff, but that woulda proved it.

[gnomenator]

SSS: THAT'S some funny s**t right there!

[ggl205]

SSS, TALK from California can be hazardous to your health too, especially when it comes from Sacto.

John