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Lets see your aftermarket seats!

Originally Posted by synolimit Still disagree. The cheap thin sheet metal the bars bolted to is not meant to withstand your body at 2-3-4-5-6-7 etc G force pulling on it

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Old 01-11-2014, 04:43 PM   #346 (permalink)
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Originally Posted by synolimit View Post
Still disagree. The cheap thin sheet metal the bars bolted to is not meant to withstand your body at 2-3-4-5-6-7 etc G force pulling on it when you smash into a wall. The bar can be tough as **** but the sheet metal will be no different than paper at high speed. You're going to break your face on the steering wheel.
The harness bar I'm talking about bolts to the upper seat belt bolts and anchors at the rear strut tower area. Or are you talking about the Robispec type bar that replaces the factory bar in the hatch?
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Old 01-11-2014, 08:23 PM   #347 (permalink)
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Originally Posted by GaleForce View Post
The harness bar I'm talking about bolts to the upper seat belt bolts and anchors at the rear strut tower area. Or are you talking about the Robispec type bar that replaces the factory bar in the hatch?
Pics?

I thought sig11 was talking about a robispec type.
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Old 01-11-2014, 08:48 PM   #348 (permalink)
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Originally Posted by synolimit View Post
Pics?

I thought sig11 was talking about a robispec type.
Check this thread to see the harness bar I'm talking about. 370Z Harness Bar
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Old 01-11-2014, 09:17 PM   #349 (permalink)
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Originally Posted by GaleForce View Post
Check this thread to see the harness bar I'm talking about. 370Z Harness Bar
It's not for me. There's a reason NASA and SCCA force you to have a diagonal bar installed in a roll cage from the top to the opposite bottom. They don't want the harness bar to collapse. I see this bar being really no different than this...which resulted in death and ejection through the front window. This was two people though pulling on the bar which was probably thousands of pounds of force.

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Old 01-11-2014, 11:53 PM   #350 (permalink)
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There were also isues with proper mounting of the lap belt and drivers seat there too. lap belts and seat mounting are supposed to be strong enough to prevent windshield ejection in the event of the upper harness failing. that or his lap belt wasnt tight.

Edit: the upper harnes is to keep you from eating wheel/dash and hold you back in the cage incase the roof colapses

Edit: also the bar in your pic is legal per scca solo rules not in higher classes though it is a C-type with 2 bolted frame connections and 2 supports.
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Old 01-12-2014, 12:04 AM   #351 (permalink)
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Originally Posted by GaleForce View Post
Very bad idea. It's a decorative cover over a metal brace. Get the Robispec bar at the minimum. I bought one of these, 370Z Harness Bar But, like others have said, the roll cage is the way to go.
actually it is an alluminum extruded tube on wek azz brackets, but no it is not up to the task of being a harness bar.
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Old 01-12-2014, 05:36 PM   #352 (permalink)
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Yeah. BGTV8's bar is mounted in the upper seatbelt holes without a secondary bar. I also have properly mounted lap/sub belts. They're still legal for NASA HPDE/TT either way.
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Old 01-13-2014, 03:35 AM   #353 (permalink)
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actually straight bars are solo legal with two connections, c type sedans require 4 points so his bar is probably legal
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Old 01-13-2014, 04:56 PM   #354 (permalink)
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Originally Posted by CarbonFZ View Post
Where do people mount there harnesses?
I'm actually curious about this as well. I have the Amuse Type 1 harness bar with the Eyebolts but i'm not sure what people are doing to mount the harness on the floor?
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Old 01-13-2014, 05:04 PM   #355 (permalink)
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For a normal 5/6-point, you can use the stock outer-lower seat belt mounting holes for the outer lap belt mount, but you need to weld in reinforced threaded mounting plates for the other 2-3 (inner lap belt + anti-sub strap(s) below the seat). Some mfgs make alternate belt setups that make some compromises in the name of being safer and more stock-compatible without all the welding, e.g. Schroth.
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Old 01-14-2014, 12:16 AM   #356 (permalink)
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I have to dig up a pic of a seat mount plate i found for the 370 that has the inner belt mount built into it. Watch out for eye bolts they are notorious for making you eat dash when they pull out of the thin tube wall or the boss welded to the bar gets ripped off. welded tabs are much stronger because you aren't drilling a hole through the tube.

Seat mount plate is made by planted technology It may be a copy of a bracket sparco makes too
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Old 01-14-2014, 12:30 AM   #357 (permalink)
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Yeah Sparco's base does have an inside belt mount, but I think that's meant for re-installing the stock 3-point system. It's kind of too close to the seat to get a good angle through the hole for a harness.

I have eye bolts on all 6 harness straps on my setup, but none of them are into tube walls. They're all on welded mounting plates (for the bottom ones) or welded tabs for the eye-bolts (for the shoulder).
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Old 01-14-2014, 12:43 AM   #358 (permalink)
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done properly with correctly rated bolts they will work you just have to be sure that the washer behind the mounting plate is big enough and strong enough not to pull through and of course the angle of the bolt has to line up with the belt, as in it should only pull on the stud not try to bend it. like this is really bad
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Old 01-14-2014, 12:48 AM   #359 (permalink)
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also FYI FIA GT class seat mounts must be bolted or welded through 3/16 x 2 flat bar welded to the floor of the vehicle from door side frame rail, down all the way across and up the side of the center console, certain specs of tube work as well but factory mounts are not strong enough for real racing
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Old 01-14-2014, 12:51 AM   #360 (permalink)
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also in the photo above of the celica harness bar the belt adjusters are up against the back of the seat so that in a collision they would either shatter the seat into the drivers back or because the buckles arent properly in tnsion like they should be they will simply snap and hes eating dash.
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