2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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Old 03-23-13, 11:17 AM
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Harness bar

Got some takata harness i'm planning on putting into my FC. After doing a few quick searches, most manufactures say not to have any more than a ~23 degree offset from the top of the seats (so your collar bones/spine isnt crushed).

I dont really want to cage my car (summer daily commuter) so i've been looking at harness bars and trying to figure out what width works best for the FC. 49" looks to be like one of the post popular/common sizes.

looking at something like this:

Old 03-23-13, 11:55 AM
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it'll work,I got 2 of em.You gotta cut plastic at the hatch strut area though.Nothing major.
Old 03-23-13, 11:57 AM
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Originally Posted by misterstyx69
it'll work,I got 2 of em.You gotta cut plastic at the hatch strut area though.Nothing major.
u use the 49" width? got any pix?
Old 03-24-13, 04:10 PM
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im interested in seeing a picture too.
Old 03-24-13, 06:11 PM
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Only one I could find in short notice..Where the bar attaches to the hatch strut support is where you trim plastic.
Attached Thumbnails Harness bar-car-insurance-pics-011.jpg  
Old 03-24-13, 06:26 PM
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Originally Posted by misterstyx69
Only one I could find in short notice..Where the bar attaches to the hatch strut support is where you trim plastic.
looks legit, why are your support kickers so large in diameter?
Old 03-24-13, 08:23 PM
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Foam encased.
You ever see those Kid's "pool noodles"??
That is one of them!It fits a harness bar perfectly and actually it went with the color scheme inside the car.
(disco ball not included!)
Old 03-25-13, 12:29 PM
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Originally Posted by misterstyx69
Foam encased.
You ever see those Kid's "pool noodles"??
That is one of them!It fits a harness bar perfectly and actually it went with the color scheme inside the car.
(disco ball not included!)
nice, do you remember the advertised width?
Old 03-25-13, 01:37 PM
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I can see the appeal but I don't think those noodles are considered safe for roll bar protection.
I'm sure they're better than nothing but lack the proper compression characteristics that the real stuff has (like this.)
Old 03-25-13, 05:17 PM
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not sold in \Blue/..lol!
It's for looks,not function.
Been building the car for 6 years,it hasn't seen real action yet.
Old 03-25-13, 06:15 PM
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because streetcar!
Old 03-25-13, 06:17 PM
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Adherence to Because Streetcar! would preclude bars in need of padding.
Old 03-25-13, 08:07 PM
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/\..I could go with that....Or just say..I'm lazy and haven't Got around to trackin it yet!..lol!
Or..Had these Pool noodles..couldn't eat them..said "hey,look at that,they'll fit here"!
(put them on,chicks will think I love kids..May work...OK!,let's do it!)
Old 03-25-13, 09:54 PM
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How/to what are the lower ends of the bars connected?
Old 03-26-13, 12:19 AM
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The main cross bar connects to the hatch strut bolts on the Rear.
Then that main cross bar is bolted,at the front,at each side,to 2 lower bars.
The lower bars that run from the main bar to the Floor are attached at the seat belt buckle location.
It uses stock mounting points,no drilling..but as I mentioned,I found that you need to trim a bit of plastic at the rear mounting point to get the main cross bar flanges to set right.
Old 03-26-13, 01:31 AM
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If you're going to run harnesses you should think about a half cage. You NEED a roll bar. The reason cars come with 3 point harnesses is because they allow your head to slide toward the middle and down in case the car flips and the roof caves in. If you run a 4/5/6 point your head can't move, and if you flip over the car it's game over.
Old 03-26-13, 11:01 AM
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Originally Posted by SilHaro
If you're going to run harnesses you should think about a half cage. You NEED a roll bar. The reason cars come with 3 point harnesses is because they allow your head to slide toward the middle and down in case the car flips and the roof caves in. If you run a 4/5/6 point your head can't move, and if you flip over the car it's game over.
unless the car is dropped from 20ft in the air on its roof from a crane, the roof will not cave. the FC actually has good crash and roll protection ratings
Old 03-26-13, 01:20 PM
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Originally Posted by gear_grinder
unless the car is dropped from 20ft in the air on its roof from a crane, the roof will not cave. the FC actually has good crash and roll protection ratings
Funny, that's probably the amount of kinetic energy in your average high-speed rollover...
Old 03-26-13, 01:29 PM
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beats the 90% of cars i see with no padding whatsoever so i wouldn't complain about regulation standards.
Old 03-26-13, 05:35 PM
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Originally Posted by HotRodMex
Funny, that's probably the amount of kinetic energy in your average high-speed rollover...
hit me with your kinematic formula and drop some knowledge on our troll'n selves
Old 03-26-13, 05:41 PM
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need a mythbusters episode for how to destroy a roof on an FC. rollover equal to 20ft vertical drop, fact or fiction?

not like i wouldn't be attempting to duck in either event! i like having a head, i may need it someday..
Old 03-26-13, 06:04 PM
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Originally Posted by gear_grinder
hit me with your kinematic formula and drop some knowledge on our troll'n selves
1/2 m*V^2 = m*g*h FIGHT!

*Just for argument's sake, we'll say the car hit a curb fully sideways, rolled 90 degrees in mid-air and slamming the roof into a cement wall.
Old 03-26-13, 06:35 PM
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Originally Posted by RXSpeed16
1/2 m*V^2 = m*g*h FIGHT!

*Just for argument's sake, we'll say the car hit a curb fully sideways, rolled 90 degrees in mid-air and slamming the roof into a cement wall.
wouldnt it have to rotate at the center of mass and not at "curb height" or you would need to compound the torque from the distance from the center of mass from the force of rotation
Old 03-26-13, 06:56 PM
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40 oz of Tequila+ Monster Truck= Rx Sandwich.
Old 03-26-13, 09:09 PM
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Originally Posted by gear_grinder
wouldnt it have to rotate at the center of mass and not at "curb height" or you would need to compound the torque from the distance from the center of mass from the force of rotation
Everything naturally rotates on its center of mass. It's just that the center of mass also moves.
Not sure what "compounding torque" is, but in modelling the scenario, some energy is converted from kinetic to rotational as the car rolls. That same energy, minus losses, contributes to the damage to the chassis as it comes to rest. So it's mostly accounted for.

It's just the closest scenario you're going to get to comparing dropping it directly on the roof to actually rolling a vehicle. If you have a rolling speed to dropped from a crane conversion factor, please share.



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