Quote:
Originally Posted by HKYStormFront
eh, i've always heard it's dangerous to have 4 or 5 pt harnesses without a cage due to rollover. 3 pt harnesses allow the body to shift down and towards the center of the car, 4 (or more) do not. this means you are somewhat trapped there. granted cars are getting safer and safer each year so this may not be as much of an issue anymore. for the street harnesses are ok but for tracking, especially purpose built tracking, i think at least a 4 pt cage would be preferable...
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Depending on how and where the harnesses are mounted, this can be true but not always. We are planning on putting a 4 bolt bolt in harness bar/roll cage shortly. When the belts are anchored to the frame rail, and at the proper angle there is very little chance of doing more harm with a 4 point ASM belt vs. the 3 point. The ASM allows the body to rotate and avoid neck injury. The GT-R and 350Z/370Z use some of the most rigid chassis designs of any production vehicle and the roof structure is incredibly strong. You also have to consider the likelihood of a rollover, vs. other forms of crashes and accidents. Rollerovers are far less likely than frontal or lateral impacts especially on track and in which case you can bet your dollar that I'd rather be properly harnessed in even without a roll bar. I went for a ride in the right seat with a student who backed it into the wall at Road Atlanta with just a 3 point. I will never do that again...felt like a donkey kicked me in the arse.
And for what it's worth on the street, the owner will be using the 3 points for easy of use purposes and will only install the harnesses when he hits the track.