Roll bar main hoop

NovaMan · 04-03-2007, 12:53 AM

Does the main hoop have to be vertical, or is it OK to lay it back a tad so it matches the door jamb and post? My 2006 NHRA rule book doesn't specify any angles, but it pictures the main hoop perpendicular to the floor.
Also, what about strength? Some guys think this would make the bar weaker, but we're not talking much angle, and it's supported front and back anyhow.

~Pete
1970 Nova
12.653@105.43

SST 3728 · 04-03-2007, 09:33 AM

You are allowed to lay it back to match the door jam , not to mention it looks a million times better this way.

SST 3728
SG 372A

etracr · 04-06-2007, 08:00 AM

There really is no rule written in the NHRA rule book about laying back the hoop with a roll bar, but if you read pg 220 1st paragraph full bodied cars roll cage it states you can as long as the driver is encapsulated with in. I would call your division tech director for a clarification.

BA Weiss · 04-07-2007, 08:58 PM

In the general regs it states that the bar cannot be more than 6" from drivers head.....

04-03-2007, 12:53 AM	#1
NovaMan Member Join Date: Sep 2004 Location: Kalamazoo, MI Posts: 117 Likes: 0 Liked 0 Times in 0 Posts	Roll bar main hoop Does the main hoop have to be vertical, or is it OK to lay it back a tad so it matches the door jamb and post? My 2006 NHRA rule book doesn't specify any angles, but it pictures the main hoop perpendicular to the floor. Also, what about strength? Some guys think this would make the bar weaker, but we're not talking much angle, and it's supported front and back anyhow. ~Pete 1970 Nova 12.653@105.43 __________________ ~Pete 1970 Nova

04-03-2007, 09:33 AM	#2
SST 3728 Junior Member Join Date: May 2004 Location: Mansfield, OH Posts: 72 Likes: 0 Liked 0 Times in 0 Posts	You are allowed to lay it back to match the door jam , not to mention it looks a million times better this way. SST 3728 SG 372A __________________ Alex Miller

04-06-2007, 08:00 AM	#3
etracr Junior Member Join Date: Jun 2006 Location: Flanders Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	There really is no rule written in the NHRA rule book about laying back the hoop with a roll bar, but if you read pg 220 1st paragraph full bodied cars roll cage it states you can as long as the driver is encapsulated with in. I would call your division tech director for a clarification.

04-07-2007, 08:58 PM	#4
BA Weiss Junior Member Join Date: Jul 2006 Location: Billings MT Posts: 44 Likes: 0 Liked 0 Times in 0 Posts	In the general regs it states that the bar cannot be more than 6" from drivers head.....