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> Racing Harnessess, Install
post Mar 4, 2004 - 9:54 PM
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Sev408



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Ive been wondering how do you install a 3 point racing harness when you dont have a roll cage??

I thought you just bolt it down to the floor but where is a brace to attach it to.


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post Mar 6, 2004 - 7:29 PM
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SpedToe169



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Yeah i thought 3 pt harnessess had 2 straps on the sides and one that was attached to the roll cage?


Once again, there is no such thing as a 3-point harness....its just a seatbelt.

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I remember seeing something in Super Street that a company sold a bar that bolts onto the seatbelt part and connects to both of them so you can install harnessess.


Yes, they exist, but to my knowledge, nobody makes one for the celica. You'd have to have one custom made.

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my harnesses are bolt in ones.. and I really dont wanna mess with straps goin all the way to the rear seat area just to mount them... I have seen it done before and that is why I asked if Its a bad idea or not... the set up im talkin about still goes over the roll cage bar behind the seat like it should.. I know enuf not to just have them directly come down the back of the seat to the floor.. the set up Im talkin about comes straight back to the bar like it should then angles down 90 degrees and mounts onto the floor. It makes sense to me that in an accident it would pull you back not down, figure this setup would be fine but wanted to make sure it wasnt a big NO NO that I have somehow over looked that last 8-10 years 


Lets back up. Do you have a cage or a harness bar? I think you're making this way more complicated than it has to be. Many harnesses come with the hardware to bolt in. And nearly all that come with that configuration can be converted to wrap around the bars. The wrap around style are far superior for a number of reasons. In a crash, you harness stretches, the longer it is the more it stretches. If its really long, your head can and will hit the steering wheel and if that happens you're in deep do do. Secondly, bolting it to the floor seems like a good idea, and it can work, but you have to be very, very careful with how you do it. Much of the metal in the floor is pretty thin, it will totally tear out in a crash if not supported VERY well. Yet another reason why the wrap around style is better. The seatbelt attachment points are already reinforced (where a harness bar would bolt in) and if you have a cage, its already way stronger.

Dynamic forces in a crash can be insanely large. Forces up to and exceeding 60g are not uncommon. As an example I weigh 165lbs. In a 60g impact, I would exert a force of almost 10,000lbs on the belts in the car (and also possibly the seat, another reason to buy good seats). I've seen lesser impacts break every motor and tranny mount in a car. Not because any part of the drivetrain was touched, but because the force due to deceleration was so great that the mounts failed. The safety systems in the car were well designed, the driver was fine. The car wasn't even hurt that bad but it gives you an idea how serious this issue is.

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