Singh_snisen

Yes I have bud^. Yes I have. Saved my life.

ajohnson

I'll add my comments here. The roll cage which they show the design seems pretty basic. Nascar bars are good piece of mind and certainly add to interior space if you can.

the tubing seems to be overkill. my cage is 1.5 x .095, so 1 5/8x.120 is way thick and heavy. I would ask what the cage weight is. That being said, if you have a good welder the cage appears to be decent;.

i wouldn't recommend a chromoly cage. If not welded properly, the weld can be very brittle. They should be normalized after welding, but most don't do that. For a cost/weight standpoint, DOM is a better way to go.


is there any reason you couldn't just weld your current cage in?

Singh_snisen

I am debating on welding my current cage and add side protection to it. Also my cage is very light. Chromoly cages are very good and imo better than steel. That's why lots off roaders use chromoly cages and they flip their cars daily. Yes I know the welds get brittle just like welding titanium. But my friend is a real professional with welding and does jobs on industrial companies. I can only trust him. Plus I'm making him tig it all up for the deepest penetration. I was just curious about this company and am very surprised no one has delt with them.

slowd16

From everything I've heard/read, chromoly is actually worse than steel. Chromoly under pressure wont bend like steel will. It just cracks and breaks. I'd rather have a heavy steel cage that bends on impact to absorb the hit than one that's lighter and cracks.

DavidNJ

Reference point Miata cage kits cost $1000-$1300 and $2000-$2500 for welding. Complete cages from an experienced builder are $3000-$5000. There are lots of compromises depending on the rules, the size of the driver, and the seat. It is always a razor thin distance between the cage and roof. I'm guessing the S2k has the same issues.

Some of the cost depends on who strips the interior, moves the dash, etc.

$300? I doubt that covers the materials.

King Tut

I know a guy that just got a full custom cage for his S2k for $2600 and it was done in like 4 days. Find a good cage builder and let them custom build you an SCCA/NASA legal cage.

bgoetz

wow, nice, didn't expect that response!! Hopefully you bought a new one

Singh_snisen

Yes I have many race shops here. Probably going to test the yield strength of my current cage in the lab and play around with chromoly. If I think it's good enough il stick with mine and have it welded.

Reid

Do you have any pictures of how the cage held up in the rollover? It's rare to see someone with a Cusco cage who has actually tested it.

DavidNJ

4130 and 1018 have the same elongation but 4130 has a much higher yield strength. Where the rules allow smaller diameter or thinner tubing for 4130 there can be weight savings. However, neither SCCA nor NASA seems to give different tubing sizes for 4130. SCCA did 45 years ago.

The weight break for NASA is 2500lb, for SCCA 2700. Below that 1.5x.095, above 1.5x.120 or 1.75x.095. Their stiffness and weight are the same. The 4130 has about a 25% higher yield and tensile strengths; have there been any cases where there was a cage failure and 25% increase in tubing yield or tensile strength made a difference? I don't know of any.

4130 is more expensive to weld and there are fewer welders skilled to do it. For most racers that is the ultimate issue.