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Old February 2nd, 2018, 11:32 AM
teberhard teberhard is offline
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Default 4 point harness

Got the tornado running really well now and excited to get it on the road but want safety first. I have some mastercraft jeep seats installed(worked great and at $180/seat a great deal). Bought some 4 point harnesses and going to use the existing lower attachments but as for the uppers I was thinking of just reinforcing the upper part of the cab behind the seat and through bolting the harness(they say not to go straight down to the floor for safety). Will this be strong enough? Seems the cab is pretty strong in that area already. With some reinforcement should be good to go. In an accident I could see possibly bending the cab a little but not failing. Better then crushing my chest on the steering wheel

What do you guys think?

Last edited by teberhard; February 2nd, 2018 at 11:52 AM.
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Old February 3rd, 2018, 11:51 AM
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Probably strong enough there but some reinforcing sure couldn't hurt, don't know if you're a fat kid like me.

I read somewhere the top straps on a harness or shoulder belt shouldn't be any lower than your shoulder. That would produce a downward force as well as the belt pulling back against you in an accident. Could screw up some of your innards.
I don't know and don't be wanna be one of those jackwagons trying to crush your dreams. I just read it somewhere.
I don't have any belts in mine yet, want to get a cage on it first. I've been in rollovers and don't want to be strapped into that big slug if it lands on it's top, the canvas and top bows aren't very sturdy.
I'll just keep it slow and steady till then...
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Old February 3rd, 2018, 10:46 PM
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newer cars have lowed the dash so your knees will keep you from sliding out the bottom of the seat belt.
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Old February 4th, 2018, 07:37 AM
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Quote:
Originally Posted by tomb View Post
newer cars have lowed the dash so your knees will keep you from sliding out the bottom of the seat belt.
hahaha.
Not so good on the knees. At least the dashes are all plastic.
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Old February 12th, 2018, 06:30 AM
teberhard teberhard is offline
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Quote:
Originally Posted by Von View Post
Probably strong enough there but some reinforcing sure couldn't hurt, don't know if you're a fat kid like me.

I read somewhere the top straps on a harness or shoulder belt shouldn't be any lower than your shoulder. That would produce a downward force as well as the belt pulling back against you in an accident. Could screw up some of your innards.
I don't know and don't be wanna be one of those jackwagons trying to crush your dreams. I just read it somewhere.
I don't have any belts in mine yet, want to get a cage on it first. I've been in rollovers and don't want to be strapped into that big slug if it lands on it's top, the canvas and top bows aren't very sturdy.
I'll just keep it slow and steady till then...
After some research it seems the most optimal placement is slightly below the should at about a 20 degree angle but nothing more then 45 degree angle below the shoulder because of the risk of spinal compression.

But you right a roll cage is definitely something I want to add in the future. The space in the cab is so limited I wonder if you could attach the roll cage to the windshield like the civi jeeps to save knee room.

Last edited by teberhard; February 12th, 2018 at 06:34 AM.
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Old February 12th, 2018, 07:45 AM
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Don't know how well the windshield frame would hold up to the weight of the truck.

During a rollover or really bad landing on the top (or landing in general) it's not just the weight of the truck but also the force from the inertia of the truck flying or falling through the air. That can add quite a bit of force.

When I rolled my old Trooper I was doing about 45 mph when a drunk clipped my left rear wheel. That set her to spinning and cartwheeling like a Ninja ballerina. Some witnesses said 4 flips, some said 5. Felt like 32 and I also felt my L1 vertebrate burst on the third hit. You wanna stay away from that spinal compression crap...

The roof was pretty mangled just from the hits on the sides, rolling. It never hit on the roof and I don't think the roof would have held up very well if it had. Luckily she landed on her wheels.
My third rollover and landed right side up on all of them!


I've seen pics of a few M715 cages that fit the cab pretty good and looked like they wouldn't be too big a hassle. When I get around to getting one I'll actually spend some money and hire somebody that knows what they're doing. Not gonna try that myself... I've seen my welds..
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