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Old 03-07-2009, 02:36 PM
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Unibody Rollbar Question

I have always been told that for an NHRA rollbar to be legal the crossbar or harness bar must be welded in.

According to Mike Galimi of MM&FF in a unibody car the crossbar can be bolted in.

I do not have a current NHRA rulebook and was wondering if there is anything in the rulebook to support or refute his statement.



http://blogs.musclemustangfastfords....hra/index.html

Thanks in advance.

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Old 03-07-2009, 03:09 PM
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Hi,
Welcome to Hotrodders .com Glad to have you with us.
If you Google NHRA rules for roll cages, there are differences
according to your speed, I'm still reading to see just what I need myself.
Rich
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Old 03-07-2009, 08:48 PM
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This exact question was recently posted on YellowBullet.com and was answered by several chassis shops. The bar has to be welded in to be legal.
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Old 03-07-2009, 09:26 PM
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I would check the rules, But I will be willing to bet it has to be welded in.
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Old 03-07-2009, 09:44 PM
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"Cars without a frame must securely attach roll bar with 6" X 6" X .125 steel plates on top and bottomof floor bolted together with at least four 3/8" bolts and nuts." Page 104 of the IHRA rule book. The NHRA book says basically the same. page 262.
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Old 03-07-2009, 09:47 PM
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I think he's talking about the crossbar or harness bar behind the seat.
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Old 03-08-2009, 11:43 AM
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I guess I jumped over the post to quick. Sorry!
In the NHRA rule book, starting near the bottom of page 261, it says "Crossbar and rear braces must be welded to main hoop. Sidebar must be included on driver's side and must pass the driver at a point midway between the shoulder and elbow. Swing-out sidebar permitted. All roll bars must have in their construction a cross bar for seat bracing and as a shoulder harness attachment point; cross bar must be installed no more than 4 inches below, and not above the drivers shoulders or to the side bar."

Bill
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Old 03-08-2009, 01:46 PM
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Quote:
Originally Posted by WDCreech
I guess I jumped over the post to quick. Sorry!
In the NHRA rule book, starting near the bottom of page 261, it says "Crossbar and rear braces must be welded to main hoop. Sidebar must be included on driver's side and must pass the driver at a point midway between the shoulder and elbow. Swing-out sidebar permitted. All roll bars must have in their construction a cross bar for seat bracing and as a shoulder harness attachment point; cross bar must be installed no more than 4 inches below, and not above the drivers shoulders or to the side bar."

Bill
That's exactly how I understood it.

That's why I am wondering what made him think that the crossbar could be bolted in?
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Old 03-08-2009, 02:33 PM
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Hi,
I guess I'm going to have to invest the ten dollars for a book, or a subscription to ND. Because where I was reading for the speed I intend to go, a full cage is what it said I would need, with a shoot, & I don't remember what else right now, when I ran before at around the same speed, all I needed was a helmet, seat belt, scatter shield & a couple of other minor things.
Rich
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Old 03-08-2009, 02:37 PM
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Quote:
Originally Posted by richard stewart 3rd
Hi,
I guess I'm going to have to invest the ten dollars for a book, or a subscription to ND. Because where I was reading for the speed I intend to go, a full cage is what it said I would need, with a shoot, & I don't remember what else right now, when I ran before at around the same speed, all I needed was a helmet, seat belt, scatter shield & a couple of other minor things.
Rich

You only need a roll cage,At a certain speed.
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Old 03-08-2009, 02:38 PM
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Quote:
Originally Posted by Thump_rrr
That's exactly how I understood it.

That's why I am wondering what made him think that the crossbar could be bolted in?


What exactly are you calling the cross bar,Just The bar behind the seat? Is it the one marked A ,Are the one by the door.If you are talking about the one by the door,They sell a pin kit for that bar.
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Old 03-08-2009, 02:40 PM
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I don't know anymore that's why I think I had better get a rule book.
rich
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Old 03-08-2009, 02:51 PM
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Quote:
Originally Posted by richard stewart 3rd
I don't know anymore that's why I think I had better get a rule book.
rich
''Roll bar's'' are Mandatory in all cars running 11.49 or Quicker.I just looked it up.

''roll cages'' are mandatory on cars running 10.99 or Quicker.

Last edited by NEW INTERIORS; 03-08-2009 at 04:58 PM.
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Old 03-08-2009, 03:14 PM
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New interiors,
Thank you for taking the time to do that, it is most appreciated.
Rich
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Old 03-08-2009, 03:22 PM
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Originally Posted by richard stewart 3rd
New interiors,
Thank you for taking the time to do that, it is most appreciated.
Rich

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