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View Full Version : Whats required to run what in the 1/4


zander
03-06-2008, 01:54 PM
ALL RACERS
General Clothing – All drivers are required to wear full-length pants to the ankle,
shoes, and socks. Shorts, bare legs, tank tops, bare torsos, nylon or nylon-type
clothing, and open-toe shows are prohibited when driving in any class.
Seat belts – All cars not required by class requirements to use SFI 16.1 spec driverrestraint
systems must be equipped with an accepted quick-release-type driver seat
belt.
Driver License– All drivers running must have a valid state or government issued
driver’s license.
Fire extinguisher system – Minimum 5 pounds, NHRA-accepted fire extinguishing
system mandatory for all Pro Heads-Up Racers.
Battery master cutoff – Mandatory when battery is relocated from factory position.
Wheelstuds – Thread engagement on all wheelstuds to the lugnut must be equivalent
to or greater than the diameter of the stud.
Tailights – All vehicles must have a minimum of one working taillight for night
operations.
Liquid overflow – All vehicles in competition with any type of water overflow capable of
spilling water must have a catch can to accumulate the excess liquids and prevent
leaking onto the track. Minimum catch can capacity: one pint. Catch can must be
securely fastened.
Pressurized Bottles – All pressurized bottles (i.e., air, nitrous oxide, CO2, Etc.) must
meet and be engraved as meeting DOT-1800-pound minimum spec. All bottles must be
securely mounted (hose clamps and/or tie wraps prohibited). Bottles mounted within the
driver compartment must have “blow-down” tube vented to outside of vehicle.

RUNNING 13.99 to 12.00
Helmets – Drivers of all cars running 13.99 or quicker must use a helmet meeting Snell
95, K98, 2000, 2005 or SFI 31.1, 31.2, 31.1A, 31.2A, 31.1/2005, 41.1,
41.2, 41.1A, 41.2A, or 41.1/2005
Drivers of cars running faster than 7.49 or quicker must use a helmet meeting
Snell SA95, SA2000, SA2005 or SFI 31.1, 31.2, 31.1A, 31.2A, or 31.1/2005
Specs.
Driveline – All RWD cars running 13.99 or quicker on slicks must have a driveshaft
loop.

RUNNING 11.99 to 11.50
Clutch – Clutch in cars running 11.99 quicker must meet SFI 1.1, 1.2, 1.4 specs.
Flywheel shield – All cars using a clutch and running quicker than 11.99 or faster than
135mph must be equipped with a flywheel shield made of 1/4inch minimum thickness
steel plate. In lieu of shield, a blanket meeting SFI 4.1 spec, completely surrounding the
bellhousing, is permitted
Flywheel – Stock-type cast iron flywheels and/or pressure plats are prohibited in any
car running 11.99 or quicker. Units that meet SFI 1.1, 1.2, 1.3 or 1.4 specs are
mandatory in all cars running 11.99 or quicker.
Tires – Metal, screw-in valve stems mandatory in tubeless tires, front and rear, on cars
running 11.99 or quicker.

RUNNING 11.49 to 11.00
Driveline – All RWD cars running 11.49 or quicker on street tires must have a
driveshaft loop.
Driver restraint systems – A quick release, 3 inch shoulder harness meeting SFI 16.1
spec is mandatory in all cars in competition required by the rules to have a roll bar or roll
cage.
Roll Bars – 5-point NHRA-legal roll bar is mandatory in any car running 11.49 or
quicker.
Head protector – In any car where a roll bar or roll cage installed, a padded head
protector must be provided at the back of the drivers head and construction in an
attempt to prevent whiplash upon impact.
Protective clothing – Jacket meeting SFI 3.2A/1 spec mandatory

Aftermarket induction (s/c, turbo or nitrous) will require a jacket meeting SFI 3.2A/1 specs also. They are really cracking down on this, along with helmet requirements. You break 13.99 twice, have a helmet or go home :lol:
Rules are the same for firebird and speedworld, no getting away with little things at speedworld ;)
Sport Compact nitrous rules
1:9 NITROUS OXIDE
Nitrous oxide permitted in all classes except All Motor. The use of
any agents other than nitrous oxide as part of, or mixed with, this
pressurized fuel system is strictly prohibited. All bottles must be
securely mounted, stamped with minimum DOT-1800-pound rating,
and identified as nitrous oxide. Nitrous oxide bottle(s) located in
driver compartment must be equipped with a relief valve and
vented outside of compartment. System must be commercially
available and installed per manufacturer’s recommendations.
Commercially available, thermostatically controlled blanket-type
warmer accepted. Any other external heating of bottle(s)
prohibited.

melly mel
03-06-2008, 01:56 PM
Sticky worthy. Thanks Alex.

zander
03-06-2008, 02:02 PM
No problem.
Some of us are getting quite a bit faster ;) And I'd hate to see people get denied at the track.

melly mel
03-06-2008, 02:05 PM
So if I'm reading that right, blow down tube is only required if it's IN the cockpit? I've heard of others getting denied for not having one in the trunk. Someone clarify before I spend $20. Lol.

az03g
03-06-2008, 02:10 PM
no it's necessary any time it's in the vehicle.

zander
03-06-2008, 02:11 PM
Those are 06 rules, and the rules change pretty much every year... and the NHRA site is hard to navigate. Let me see what I can find.
Found it and updated the original post, wording is "Drivers Compartment"
since there is no firewall between the seating compartment and the trunk, the trunk will be considered part of the "drivers compartment"
If you have a firewall (1/4in I think?) you wouldn't need a blow down tube if its mounted in the trunk, but thats alot of modification to not get a blow down tube lol.

hacku
03-06-2008, 02:26 PM
So if I'm reading that right, blow down tube is only required if it's IN the cockpit? I've heard of others getting denied for not having one in the trunk. Someone clarify before I spend $20. Lol.

The blowdown tube IS required even if the bottle is in the trunk. I thought it was only if it was in the passenger compartment too, but then found out that the only time it's not required in the trunk is if the trunk has a firewall built in it, and your back seat is NOT considered a firewall... lol

EDIT:

Looks like I was a little slow on this. Got held up on the phone with a customer while I was typing this, but it looks like Zander covered it already... lol

melly mel
03-06-2008, 04:49 PM
Just thought of something. If N²O is non-flammable, what's the point of a jacket? Wouldn't a kevlar vest be more logical?

hacku
03-06-2008, 05:20 PM
N2O itself is not flammable, but mixed with the gasoline in your engine can make for nice BOOM if not tuned properly.

Just a safety precaution more than anything in case your engine was to catch fire...

VQedBalb
10-01-2009, 11:00 PM
I could not belive that helmets expire... kinda like milk does LOL!!! My helmet is going out of date this december... to bad no use for it anymore

James
10-01-2009, 11:06 PM
damn you bumped an old ass thread..