WannaGoFas Posted March 8, 2015 Share Posted March 8, 2015 So I have been building a 95 M3 to compete in NASA - Texas reign TTC or TTB and eventually for GTS. I've gone over everything Mechanically and its time for the Roll cage and other safety equipment to get installed. I am looking at what it will take to create the safest/strongest roll cage possible while still remaining TT legal. (A little background, i already have a few pieces of titanium in my legs from a previous accident, so safety is something I take very seriously) I'm planning on going with a "basic design" custom 6 point weld in cage with foot-well intrusion bars and dash bar added. I'll have it built by my friends over at Apex Auto works https://www.facebook.com/ApexAutoWorks (check out there page great guys and the awesome work). Im looking for something very similar to this design inside a E46 that TC design built. I like how it is as close to the structure of the car as possible, giving maximum room inside the car. I may also add another cross bar from the passenger side main hoop to the driver side rear cage mount. I quess my real question is, Is this Legal for NASA TT to weld the main hoop the the body? and also on the A-pillar I know we are allowed to add gusting for support, but what about welding the cage to different parts to the body to maximize space inside the car. Or is it stronger to just add gusting in those areas? any help is appreciated, sorry for the huge pictures, i cant resize them on this forum, click here for smaller pics http://www.bimmerforums.com/forum/showthread.php?2155859-NASA-TT-GTS-Roll-Cage-question Quote Link to comment Share on other sites More sharing options...
TurboShortBus Posted March 9, 2015 Share Posted March 9, 2015 I quess my real question is, Is this Legal for NASA TT to weld the main hoop the the body? and also on the A-pillar The short answer is yes. Refer to 2015 TTB-TTF classification form Section H, as it is pretty clearly spelled out. I know we are allowed to add gusting for support, but what about welding the cage to different parts to the body to maximize space inside the car. Or is it stronger to just add gusting in those areas? You might be looking for gusseting here. Mark Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted March 9, 2015 Share Posted March 9, 2015 building for GTS I would use TT3 or TT2 as my target TT class on my way there. GTS is very open on mods allowed, and TT# more closely mimmicks that. Quote Link to comment Share on other sites More sharing options...
fox4life Posted March 9, 2015 Share Posted March 9, 2015 It is legal to weld the cage to the body as you showed in those pictures. However, it would be counted as another attachment point(s), and those are assessed points in TTf-b. Im no expert, thats just how it was explained to me when I asked. So if im incorrect, someone can chime in. Quote Link to comment Share on other sites More sharing options...
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