Check out this removable crossbar

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Mar 15, 2008 | 11:17 PM

fast01

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From: Farmingville, New York

Check out this removable crossbar

Ok, I'm going to be installing a 6 point 4130 roll bar in my Z-28 over the next few weeks. The car is my daily driver and I do have an 11 year old step daughter who rides in the car sometimes, so I was a little concerned about the cross bar. Through some research I found this joit to make it removable. I know that a removable bar is not NHRA legal, but a few guys I've spoken to have gotten past tech with this. It seems much stronger than the traditional method of making a bar removable as these are machined out of solid 4130 and are held with 2 3/8" hardened bolts. These are used in off-road racing all the time, so I don't see them a s being a weak point. That joint should be stronger than the bars around it! Tell me what you think.

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Check out this removable crossbar-weld_004.jpg

Check out this removable crossbar-crap-20006.jpg

Mar 16, 2008 | 05:57 AM

JL ws-6

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If you want to get thru tech, make some type of cover to go over that, because they won't like it regardless how strong it is.

Mar 16, 2008 | 08:49 AM

fast01

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From: Farmingville, New York

Yeah, I figured as much. A little roll bar padding and no one will know

Mar 16, 2008 | 08:54 AM

WHITE DEVIL

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From: Mcalester, Ok

actuallys a 10 point with swingouts is legal to 8.50 so they dont have to like it but by NHRA rules they will let you run

Mar 16, 2008 | 09:07 AM

TS6

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From: Champaign Il

Quote:

Originally Posted by WHITE DEVIL

actuallys a 10 point with swingouts is legal to 8.50 so they dont have to like it but by NHRA rules they will let you run

Thats a cross bar, not a swing out, so its illegal.

Mar 16, 2008 | 09:21 AM

DOTracer

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From: Westminster, MD

Removable seat cross bars have never been legal to my knowledge. Also, the 3/8" bolts are too small as swing out side bars require 1/2" bolts/pins minimum.

Mar 16, 2008 | 10:56 AM

Fast_94_Z

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From: carol stream illinois

removeable crossbars are illegal.

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Mar 16, 2008 | 10:11 PM

crashinaz

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From: Chandler, AZ

I've used these on rock crawler chassis builds for non-primary loaded tubes and only near the node (like you have it)... It's about the best you get for a removable joint... Quite strong compression and tension, but only as strong as the bolt or threads in shear... Which is good because the crossbar is there to keep the b-hoop from deforming under tension and/or compression.

I can't really tell, but I'd recomend a plug weld where the slug slides inside the tube.