Cage or Roll Bar Specs?

[conekiller13]

Anyone know what Scca or Silver state Regs on cages are?

[sinned]

NASA requires at least 2"X.120" (at it's thinnest) so better go with at least 2"X.165" for the bends. You can go down to a 1.75"X.095 if you run cro-mo. Not worth it IMO. Silver state and SCCA are very similiar...way more stringent than NHRA or IHRA.

Of course hitting a guard rail at 120MPH is not really as bad as barrel rolling 6X at over 150MPH through the rocks and into a mountain side. Most of the SSCC wrecks I have seen you can't even tell what kind of car it might have been.

[conekiller13]

Denny,

Why do think Cro-Mo is not worth it? I had thought that was the standard..............I really don't know much when it comes to this though.

[sinned]

Added expense. The price of steel has tripled if not more in the last 3-5 months. Tubing has gotten VERY expensive. Using good old DOM 2X.150" will save a bunch of money without sacrificing much weight (maybe 40lbs or so if that).

The other reason is some organizations that spec cage constructions do not differentiate between cro-mo and DOM so using cro-mo might not have any weight advantage (the reason for use of cro-mo is usually you can run smaller tubing with the same protection for weight savings).

I have a friend who installed a very nice cage, passed tech at almost every sanctioning event EXCEPT the one he drove 800 miles to enter. They turned him around for floor plate size. I always recommend overbuilding the hell out of everything for that exact reason.

[67Sally]

Originally Posted by conekiller13

Anyone know what Scca or Silver state Regs on cages are?

The 2005 Rule Book is at their site in pdf format "link"
W.

[68protouring454]

i see for 2700 b vehicles and over they require 1.75x.090 wall
what would the reason for 2x.150 ?? those are scca rules right?, also nhra says 1 5/8 dom .118 minimum wall thickness in a bend, so you would need 1-5/8 .134 to make that, if you went 1.75x.090 it would not pass nhra, would 1.75 x .150 be the best bet to be good all the way around??

jake

[CraigMorrison]

On a mild steel roll cage we use 1.75"X .134". If SCCA allows mild steel (like NHRA/IHRA does) this might be the way to go.

[68protouring454]

what about scca?? i read thru rules posted above and over 2700lbs it needs 1.75 x1.50?? not sure i follow will your cage pass scca,silver state etc?
jake

[sinned]

Ahhh, and there lies the catch. That is why I recommended 2.00X.154". At that size you are only going to be gaining ~50lbs in extra weight and you are going to be guaranteed to pass any tech at any event..period.

[conekiller13]

Originally Posted by dennis68

Ahhh, and there lies the catch. That is why I recommended 2.00X.154". At that size you are only going to be gaining ~50lbs in extra weight and you are going to be guaranteed to pass any tech at any event..period.

Good point............