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:

 

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?

 

im interested in seeing a picture too.

 

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?

 

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?

 

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.)

 

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.

 

because streetcar!

 

Adherence to Because Streetcar! would preclude bars in need of padding.

 

/\..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!)

 

How/to what are the lower ends of the bars connected?

 

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.

 

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

 

Funny, that's probably the amount of kinetic energy in your average high-speed rollover...

 

beats the 90% of cars i see with no padding whatsoever so i wouldn't complain about regulation standards.

 

hit me with your kinematic formula and drop some knowledge on our troll'n selves

 

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..

 

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

 

40 oz of Tequila+ Monster Truck= Rx Sandwich.

 

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.