Billy Posted August 23, 2021 Report Share Posted August 23, 2021 New team - was unsure if we should submit a tech desk ticket or ask here. We need to change the location of our harness bar to get the correct angle on our belts. Can we fabricate a bolt in bar between the seat belt pillars in a Miata and pass tech inspection? We would be using the 1.5x.120 DOM tubing and large spreader plates (roughly the size of the belt pillars). We'd like to use bolt in to keep access to the parcel shelf panels. See picture for mounting location. Our belt hardware is binding against the back of the seat in any position due to us putting the seat all the way back so this would solve two issues for us. Quote Link to comment Share on other sites More sharing options...
Ian Posted August 23, 2021 Report Share Posted August 23, 2021 I would submit a tech desk ticket to be positive, but I would say no. Harness bar must be a welded element of the cage. That being said, you can bend the harness bar away from the seat enough to move belts, but not so much as to block parcel shelf access. 1 Quote Link to comment Share on other sites More sharing options...
enginerd Posted August 23, 2021 Report Share Posted August 23, 2021 58 minutes ago, Billy said: New team - was unsure if we should submit a tech desk ticket or ask here. We need to change the location of our harness bar to get the correct angle on our belts. Can we fabricate a bolt in bar between the seat belt pillars in a Miata and pass tech inspection? We would be using the 1.5x.120 DOM tubing and large spreader plates (roughly the size of the belt pillars). We'd like to use bolt in to keep access to the parcel shelf panels. See picture for mounting location. Our belt hardware is binding against the back of the seat in any position due to us putting the seat all the way back so this would solve two issues for us. I’d bend a bar into a wide “U” and weld to existing harness bar. Belts would attach to new bar. 3 Quote Link to comment Share on other sites More sharing options...
MMiskoe Posted August 23, 2021 Report Share Posted August 23, 2021 Tech is pretty adamant that there are no exceptions to things like that, so I'm not sure I would bother writing the ticket, just change the bar. The spot you circled in the picture, that tower can be cut off which would give you room to add a bar. If the bar that the harnesses is attached to has any bends, Tech likes to see something that captures the harnesses and keeps them from being able to slide around the corner. Shaft collars, roll cage padding with hose clamps etc. What they are asking for makes sense, you don't want the harness sliding to the side and being able to then be loose. You must have some tall drivers. Quote Link to comment Share on other sites More sharing options...
Billy Posted August 23, 2021 Author Report Share Posted August 23, 2021 We have our seat on the TDR low mount which gets it almost on the floor with a 20 degree tilt so we are about as close to the floor without doing a drop pan as we can get. I was afraid to cut the towers as they seem pretty rigid and didn't want to sacrifice any structural integrity of the car. Is cutting those towers off common? If we could do that then welding a U shaped bar the length of the cage would work and I assume would pass easily. 1 Quote Link to comment Share on other sites More sharing options...
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