1/4 mile rollcage rules?

[boostin97talon]

I was wondering what the rules are for having a rollcage at an IHRA track (Great Lakes Dragaway, Union Grove, WI). I've heard 12.99 or faster you need one from friends of mine, but they're not sure (they run 8 second cars so rollcage is a given). I will definetly be in the low 12's with my recent mods, but I don't want to drive 2 hours one way and pay the $30 to run my car once and get kicked out for not having a cage. I know I've seen several 12 second cars there, many of which I doubt had a cage, but I couldn't say for sure. I looked on their website, which listed the 13.99 second helmet rule, but didn't say anything about a rollcage. If anyone has had any experience with 'da Grove and this matter, please let me know. Thanks!

 

[4Bangin]

12.99 or lower if your a convertible, I think you have to be faster than 10.99 for a rollcage if you have a hardtop.

 

[McD]

I thought that you had to have a roll bar (4 point) at 11.99, a cage at 10.99 (6 point) and a certified cage and chassis combo at 9.99 (8 point).

If your friends have a rule book have em look it up and if I remember I will too.

Good Luck

Jason.

 

[KenTSIII]

have to have a 5point (6pt w/ the passenger bar removed) to run 11.99 or faster.. then you need a 6 pt at 10.99 or faster.. and a 10pt for anything faster than 135mph.. I think I'm remembering this right.

 

[OMN_DSM]

4:10 Roll Bars
Mandatory in all cars running 11.99 or quicker, or per Class
Requirements. All roll bars must be within 6 inches of the rear or
side of the driver's head, extend in height at least 3 inches above
the driver's helmet with driver in normal driving position, and be at
least as wide as the driver's shoulders or within 1 inch of the
driver's door. Roll bar must be adequately supported or crossbraced
to prevent forward or lateral collapse. Rear braces must be
of the same diameter and wall thickness as the roll bar and
6" max
All cars with an OEM frame must have roll bar attached to frame Cars without frame use 6" square 1/8" steel plates on top and bottom of floor, securely bolted together with at least four 3/8" bolts, or top plate welded to rocker sill Maximum of 6" from roll bar to driver's helmet Maximum of 5" from top of roll bar to brace All materials must be 1 3/4" O.D. x .118" mild steel or .083" 4130 chrome moly tubing, except A, which is 1 1/4" O.D. x .118" mild steel or .065" 4130 chrome moly tubing
5" max

4:10
intersect with the roll bar at a point not more than 5 inches from
the top of the roll bar. 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 the shoulderharness
attachment point; cross bar must be installed no more
than 4 inches below, and not above, the driver's shoulders or to
side bar. All vehicles with OEM frame (i.e., pickup truck where
body bolts to framerails) must have roll bar welded or bolted to
frame. Installation of frame connectors on unibody cars does not
constitute a frame; therefore, it is not necessary to have the roll bar
attached to the frame. Unibody cars with stock floor and firewall
(wheeltubs permitted) may attach roll bar with 6-inch x 6-inch x
.125-inch steel plates on top and bottom of floor bolted together
with at least four 3/8-inch bolts and nuts, or weld main hoop to
rocker sill area with .125-inch reinforcing plates, with plates welded
completely. All 4130 chrome moly tube welding must be done by
approved TIG heliarc process; mild steel welding must be done by
approved MIG wire feed or approved TIG heliarc process.Welding
must be free of slag and porosity. Any grinding of welds prohibited.
See illustration. Roll bar must be padded anywhere driver's helmet
may contact it while in driving position. Adequate padding must
have minimum 1/4-inch compression or meet SFI Spec 45.1.
4:11 Roll Cage
Mandatory in all cars running quicker than 10.99 seconds or faster
than 135 mph, or per Class Requirements. Cars with unaltered
firewall, floor, and body (from firewall rearward, wheeltubs
permitted) running between 10.00 and 10.99, roll bar permitted in
place of roll cage, or per Class Requirements.
All cage structures must be designed in an attempt to protect the
driver from any angle, 360 degrees. All 4130 chrome moly (CM)
tube welding must be done by approved TIG heliarc process; mild
steel (MS) tube welding must be approved MIG wire feed or TIG
heliarc process.Welding must be free of slag and porosity. Any
grinding of welds prohibited. Additionally, roll cage must be padded
anywhere the driver's helmet may contact it while in the driving
position. See illustrations on page 75.
With driver in driving position, helmet must be in front of main
hoop. If helmet is behind or under main hoop, additional tubing,
same size and thickness as roll cage, must be added to protect
driver. Main hoop may be laid back or forward, but driver must be
encapsulated within the required roll-cage components. On
unibody cars with stock floor and firewall (wheel tubs permitted),
the roll cage may be bolted or welded to the floor/rocker box via 6-
inch x 6-inch x .125-inch steel plates similar to the roll bar
attachment requirements of paragraph 4:10, page 73. Unless
attaching to OEM floor or frame, the minimum requirements for a
frame member to which a roll-cage member is attached are 1 5/8-
inch x .118-inch MS or .083-inch CM round and/or 2-inch x 2-inch
x .058 MS or CM rectangular.
All cage structures must have in their construction a cross bar for
seat bracing and as the shoulder-harness attachment point; cross
bar must be installed no more than 4 inches below, and not above,
the driver's shoulders, or to side bar. All required rear braces must
be installed at a minimum angle of 30 degrees from vertical and
must be welded in. Side bar must pass the driver at a point midway
between the shoulder and elbow.
74 SECTION 9 - GENERAL REGULATIONS
SECTION 9 - GENERAL REGULATIONS 75
GENERAL REGULATIONS
FULL-BODIED CARS
7.50 seconds e.t. and slower
DRIVER'S-SIDE VIEW
REAR VIEW
Tubing Code
O.D. CM MS
A 1 5/8 .083 .118
B-1 1 1/2 .058 .118
B-2 1 3/8 .049 .118
B-3 1 1/4 .049 .118
C 1 1/4 .065 .118
D 1 1/4 .058 .118
CM 4130 Chrome Moly
MS Mild Steel
All cars with an OEM frame must have roll cage welded to frame.
B - If A, two bars any length.
If B1, two bars, 30" or less; must attach within 5 inches from
top of main hoop.
If B2, minimum 4 bars. At least 2 bars must attach to
horizontal portion of main hoop.
If B3, minimum 6 bars. At least 2 bars must attach to
horizontal portion of main hoop.
D - 1 1/4" x .058" chrome moly or .118 mild steel mandatory
when main hoop welded to plates on floor; must be
connected to subframe.
E - May substitute an "X" brace of 1 1/2 by .065-inch 4130
chrome moly or 1 1/2 by .118-inch mild steel.

4:11
Unless an OEM framerail is located below and outside of driver's
legs, a rocker or sill bar, minimum 1 5/8-inch x .083 CM or .118 MS
or 2-inch x 2-inch x .058-inch CM or MS rectangular, is mandatory in
any car with a modified floor or rocker box within the roll-cage
uprights (excluding 6 square feet of transmission maintenance
opening). Rocker bar must be installed below and outside of driver's
legs and must tie into the main hoop, the forward hoop, frame, frame
extension, or side diagonal. Rocker bar may not tie into swing-out
side bar support. If rocker bar ties into side diagonal more than 5
inches (edge to edge) from forward roll-cage support or main hoop,
a 1 5/8-inch x .083 CM or .118 MS brace/gusset is mandatory
between the diagonal and forward roll-cage support or main hoop.
Swing-out side bar permitted on OEM full-bodied car, 7.50 e.t. and
slower. The following requirements (a through d) apply:
a. 1 5/8-inch O.D. x .083-inch CM or .118-inch MS minimum.
Bolts/pins must be 3/8-inch-diameter steel, minimum and in
double shear at both ends.
b. Male or female clevis(es) permitted. Male clevis must use two
minimum 1/8-inch-thick brackets (CM or MS) welded to each
roll-cage upright; female must use minimum 1/4-inch-thick
bracket (CM or MS) welded to each roll-cage upright. Pins must
be within 8 inches of the vertical portion of both the forward
and main hoops. A half-cup backing device must be welded to
the vertical portion of the main hoop (inward side) or the upper
end of the swing-out bar (outward side), minimum .118-inch
wall (CM or MS) extending at least 1 5/8 inches past the center
of the pins. A clevis assembly using a minimum .350-inch-thick
male component and two minimum .175-inch-thick female
components may use a 1/2-inch-diameter Grade 5 bolt and
does not require a half-cup backing device.
c. Sliding sleeves of 1 3/8-inch x .083 CM or .118 MS, with
minimum 2-inch engagement, are permitted in lieu of the upper
pin/cup.
d. All bolt/pin holes in the swing-out bar must have at least one
hole diameter of material around the outside of the hole.
On all cars requiring a roll cage, if the OEM firewall has been
modified (in excess of 1 square foot for transmission removal, not
including bolted-in components), a lower windshield or dash bar of
1 1/4 x .058-inch 4130 chrome moly or 1 1/4 x .118-inch mild steel
is mandatory for connecting the forward cage supports.


That will keep you busy for a minute

 

[boostin97talon]

Wow, I guess that about covers it. Thanks!

 

[GRNDSM]

Actually, the correct answer is: "it depends on a track"...

NHRA tracks are 11.99, as stated above, but
IHRA tracks are 11.49

But any track can impose their own rules which are more strict than NHRA or IHRA, so do not go there with an attitude because they CAN throw you out for it!

Leon
RR

 

[Mike 99GSX]

Originally posted by GRNDSM
Actually, the correct answer is: "it depends on a track"...

NHRA tracks are 11.99, as stated above, but
IHRA tracks are 11.49

But any track can impose their own rules which are more strict than NHRA or IHRA, so do not go there with an attitude because they CAN throw you out for it!

Leon
RR

Agreed. I've been to 4 different tracks with 3 different sets of rules. If you're going to drive all that way, just call them first and ask them.

 

[WhatsADSM]

I agree with the last two posts and will add this:
In you case you are going to GLD (also my home track) and the rule is 11.49 or faster, so you will be fine. Good luck and have fun

 

[Turboniam]

Originally posted by GRNDSM
Actually, the correct answer is: "it depends on a track"...

NHRA tracks are 11.99, as stated above, but
IHRA tracks are 11.49

Thats what I have heard as well.

 

[kingearl]

Post deleted: Inappropriate personal post to IRC