Shaun Kekacs Posted February 23, 2015 Share Posted February 23, 2015 Hi All, Question? Building AI camaro, the rule book states 1.75, .120 wall mild steel, DOM role cage tubing. My question is what grade/tensile strenght steel is everyone using? I am going to place order for steel this week and do not want to get this wrong. And any other tips anyone has out there I would greatly appreaciate. thanks Quote Link to comment Share on other sites More sharing options...
Members Marshall M. Posted February 24, 2015 Members Share Posted February 24, 2015 Hi All, Question? Building AI camaro, the rule book states 1.75, .120 wall mild steel, DOM role cage tubing. My question is what grade/tensile strenght steel is everyone using? I am going to place order for steel this week and do not want to get this wrong. And any other tips anyone has out there I would greatly appreaciate. thanks Just go buy DOM 1018 Mild Steel. That will get you there. Quote Link to comment Share on other sites More sharing options...
Nenad Javorina Posted February 24, 2015 Share Posted February 24, 2015 Hello guys, who install roll cage in car and finish all ? Near Chicago? Quote Link to comment Share on other sites More sharing options...
Shaun Kekacs Posted February 25, 2015 Author Share Posted February 25, 2015 Thankyou Mosty for reply. I was thinking 1018 because thats what Summit sales and that is was my local steel rep. suggested. Just wanted to be sure. I order steel weekly at work for container repairs and truck repairs but have always just asked for mild steel. thanks again! Quote Link to comment Share on other sites More sharing options...
Bryancohnracing Posted March 3, 2015 Share Posted March 3, 2015 Nenad, A good place to start looking for cage builders in Chicagoland would be the NASA Central Tech Shop list. http://www.nasamidwest.com/rungroups/race/?page=TechShops Also know that you must ensure that whomever builds your cage reads and follows the rules in the CCR and AI rules. Biggest issue we run into with cages being built is builders not following NASA rules and building to other sanctioning bodies rules. Key here is NASA cages rules meet or exceed all other amateur road racing cage rules. Shaun, You'll want to make sure any cage kit you buy from Summit meets NASA CCR and AI rules. Good luck guys! Quote Link to comment Share on other sites More sharing options...
Nenad Javorina Posted March 3, 2015 Share Posted March 3, 2015 Thanks Bryan Quote Link to comment Share on other sites More sharing options...
wstukas Posted March 9, 2015 Share Posted March 9, 2015 Hi All, Question? Building AI camaro, the rule book states 1.75, .120 wall mild steel, DOM role cage tubing. My question is what grade/tensile strenght steel is everyone using? I am going to place order for steel this week and do not want to get this wrong. And any other tips anyone has out there I would greatly appreaciate. thanks FYI .120" wall is not required. If you build light enough .095" can be used and save nearly 50 lbs. Quote Link to comment Share on other sites More sharing options...
TurboShortBus Posted March 24, 2015 Share Posted March 24, 2015 FYI .120" wall is not required. If you build light enough .095" can be used and save nearly 50 lbs. 1.75" OD x 0.120" wall DOM MS = 2.089 lbs/ft 1.75" OD x 0.095" wall DOM MS = 1.679 lbs/ft Difference = 0.41 lbs/ft 50 lbs / 0.41 lbs/ft = 121.95 feet You would need to have 122 feet of cage tubing to save 50 lbs at that rate. Who uses that much on a cage for a production car chassis? That would be one hell of a jungle gym. Typical cages are 1/2 to 2/3 of that, so the weight savings is more realistic at 25-35 lbs. Note that the diameter and wall thickness only apply to the CCR-required cage tubes (around 65 feet on a Mustang). Non-required/optional cage tubes can be smaller diameter and/or thinner walled as you see fit. Mark Quote Link to comment Share on other sites More sharing options...
wstukas Posted April 1, 2015 Share Posted April 1, 2015 I have ~115 feet of tube in my car... Quote Link to comment Share on other sites More sharing options...
TurboShortBus Posted April 1, 2015 Share Posted April 1, 2015 I have ~115 feet of tube in my car... My overbuilt cage is in the 100 neighborhood, but the vast majority of cages that I have seen (typically built to CCR minimums, which usually work just fine, but I wanted a few more bars in mine) have much less tubing. And pretty much nobody builds the weird crap that I do. Mark Quote Link to comment Share on other sites More sharing options...
wstukas Posted April 1, 2015 Share Posted April 1, 2015 haha I feel ya. Serious jungle gym action going on in my car. I began just under the 90 foot range with your basic cage plus two sets of rear down bars. One to be legal per CCR's, the second set tied into the rear coilover mounts and both sets of downbars were tied together. Lot's of additional bracing went in with the installation of the 3 link rear after the first year. I finally went through the firewall to the shock towers last year. Some non-required bars I have are the dash bar, rocker panel bars, and an extra diagonal brace over my head went in once I cut my roof structure out (which weighs 52 lbs!!). I'm sure I ended up with close to the same weight in tubing that a "normal" cage from .120" wall would be, but I feel I have a much stiffer chassis to show for it. I don't think a "normal" cage/chassis can cut it any more these days in AI. Are they safe? Sure. But I believe that you have to build lighter and stiffer than the next guy to stay up front. Plus, the ol' wet noodle of a chassis that is Camaro needs all the help it can get!! Quote Link to comment Share on other sites More sharing options...
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