240zdan Posted November 14, 2015 Share Posted November 14, 2015 (edited) It is less than 4" below shoulder but the thing that worries me is the angle of the seatbelts which is dependant on how far back the seats been moved. Opinions? Edited November 14, 2015 by 240zdan Quote Link to comment Share on other sites More sharing options...
johnc Posted November 14, 2015 Share Posted November 14, 2015 Probably too low and the metals clips must not contact the seat in s wreck. They appear too close to the seat. Quote Link to comment Share on other sites More sharing options...
240zdan Posted November 14, 2015 Author Share Posted November 14, 2015 Probably the angle of the pic but the clips aren't too close to the seat. How far up do you suggest the harness bar be moved? Quote Link to comment Share on other sites More sharing options...
johnc Posted November 14, 2015 Share Posted November 14, 2015 Move it up so its level with or slightly above the bottom of the seat back holes. Quote Link to comment Share on other sites More sharing options...
240zdan Posted November 14, 2015 Author Share Posted November 14, 2015 (edited) Fair enough. I can do this, however the cage woudl no longer follow NHRA rules. All roll bars must have in their construction a cross bar for seat bracing and as the shoulder harness attachment point; cross bar must be installed no more than 4 inches below, and not above, the driver’s shoulders or to side bar. Any suggestions? Is creating a new harness bar that sweeps back more to reduce the harness angle more viable? The NHRA rollbar rules make no sense to me. Why are they saying the harness bar cannot be above the drivers shoulder? This is half cage I built mainly to increase chassis rigidity but I would like to keep it NHRA legals as I occasionnaly sprint down the 1/4 mile and the car is a sub 12 second car. Edited November 14, 2015 by 240zdan Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted November 15, 2015 Share Posted November 15, 2015 (edited) You shot a pic of the passenger side. The passenger side doesn't have to pass tech. Send a pic of the drivers side. Why don't you just go to the track and see if it passes tech? To adjust that bar, you will need to remove the interior so you don't set the car on fire. Might not be worth it if the car will pass tech as it sits. NHRA tech is not as tough as SCCA tech. SCCA seems to be the most draconian-maybe even a bit psycho. NHRA is pretty lenient. Plus your car isn't that fast, so they will be more lenient for that too. Edited November 15, 2015 by RebekahsZ Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted November 15, 2015 Share Posted November 15, 2015 (edited) Google the AutoPower adjustable seat back brace. I think you may be trying to combine the seat back brace AND the seatbelt attachment. Would considering them separately make things easier? Look for a thread deep in the Interior forum under my avatar called something like "Installing Kirkey aluminum seats." I've passed tech twice at ECTA, which uses the NHRA rule book in teching toolbars and cages. Only group more tech psycho than SCCA is the landspeed crowd at ECTA and SCTA. These people really just want you to survive an accident and walk away. Edited November 15, 2015 by RebekahsZ Quote Link to comment Share on other sites More sharing options...
Mike Mileski Posted November 17, 2015 Share Posted November 17, 2015 What if you just added another bar a few inches up, in line with the seat holes, and use that to attach your belts? I wouldn't think that adding an extra bar would have a negative effect. Mike Mileski Tucson, AZ 1 Quote Link to comment Share on other sites More sharing options...
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