Will this allow for too much stretch? (Harness Mounting)

[biggreen96]

http://lh3.ggpht.com/_9vKXh4RAVWo/TElCGy9a06I/AAAAAAAABzk/nV-PL_nivEQ/s800/photo.JPG

My thoughts/reasons are:

G-Force saw it fit to include this much webbing, I paid for all that webbing, why not use it all :lol:

Using all the webbing might decelerate me in a more gentle manner.

My legs are so long I have to have the seat mounted that far back, the harness buckles contact the seat if they are mounted on the "harness bar".


Is this setup :eek: or :cool:

Fyi: Despite the photo the harness bar is right at my shoulder height, the webbing was level when I strapped in.

[dazed driver]

Do you not have the bar in the back going across the rear strut towers you can wrap on? That's what I would do if I needed/wanted to use the full length of the belts. If you do it that way, don't forget to cross them. At least with this setup, you've kept the harness bar in use keeping the angle proper.

[Mark Holden]

You don't want to do that. You really don't want the belts to stretch. Much has been discussed about this by people who understand the issues much better than I, but essentially the survivability of a high G-Force crash is much greater with a tightly restrained driver (and co-driver in our case). Stretching belts allow movement you don't want, as well as offering a chance for your H&N and other parts of you to pop loose in a multiple impact scenario.

Use those nice harness bars right there. You don't have to cut the belts short, just roll up and tape or zip-tie the excess.

[bknblk]

Use those nice harness bars right there. You don't have to cut the belts short, just roll up and tape or zip-tie the excess.

He can't. The seat is so far back that the mounting hardware (the metal clip) would be in the seat holes/ his back.

Can you move the seat just a couple inches? How about a second harness bar 6 inches below the current one for harness mounting?

If the manufacturer's installation instructions show that maonting set up, it's legal.

[Rallycat66]

I would not go over one bar and strap to a second - unless you get written approval from all the sanctioning bodies that you are going to run with. Some scrutineer somewhere is not going to like it.

If adding another bar is an option - then install a second harness bar that extends back a little further from the seats to give you the clearance you need.

Another option is to web your belts differently - here is an optional webbing technique for Schroth belts that might would work in your situation. I would print out the Schroth installation information (or better yet, something from your belt manufacturer showing the same webbing technique) and have it with your logbook in case someone questions the installation - it is not what they usually see and could give you a hard time about it.

http://www.schroth.com/installation-instructions/en/images/image_057.gif

Taken from http://www.schroth.com/installation-instructions/en/index.html

[BajaBill]

SCORE requires a different wrap than RA Rally, I know because I had to rewrap at an event (Desert Storm 2007) for the mighty F-150:confused:

Bill Holmes
Truck #44

[bentmettle]

SCORE requires a different wrap than RA Rally, I know because I had to rewrap at an event (Desert Storm 2007) for the mighty F-150:confused:

Bill Holmes
Truck #44

There are no RA specific rules for wrapping.

The rule says, basically, mount it per the harness manufacturers instructions. (and keep the instructions with the logbook). (sec 5.3.L.1)

Scruitineers have preferences. Sometimes those preferences aren't the rules. The rulebook is handy in those instances.

[C_Eixen]

You don't want to do that. You really don't want the belts to stretch. Much has been discussed about this by people who understand the issues much better than I, but essentially the survivability of a high G-Force crash is much greater with a tightly restrained driver (and co-driver in our case). Stretching belts allow movement you don't want, as well as offering a chance for your H&N and other parts of you to pop loose in a multiple impact scenario.


What Mark said. Belt stretch decouples your body's deceleration from that of the car.

Or, the car stops while the belts are stretching, then at the end of the stretch, your body is moving, the car is stopped, and you get an extra-large G-load.

Think of it like a water-ski start. If you don't pull the rope tight before the boat takes off, the speed differential gets too large and rips the rope out of your hands.

[heymagic]

The belts are allowable as installed. They are no different than mounted on the package tray or at the shock towers. I would like to see something clamped or welded on the Xbar just outside the belts to keep the from sliding around on the bar. They can't actually be crossed because of the lower mount .

They are certified as is with the length issue. So if there is stretch it has been accepted by FIA and SFI.

What you/we don't want are belts being relocated by the seat openings or wrapping up over the shoulder itsself and then down to the latch.