Hawkeye Downs
Chief Tech Inspector: Don Burkey (319) 929-6979 or (319) 472-5081 Tech
Inspector: Dan Higdon (319) 981-7693
Competition Director: Chris Stocks (319) 365-8656
YOU
ARE EXPECTED TO KNOW THE RULES. IGNORANCE IS NOT AN EXCUSE!
The rules and/or
regulations set forth herein are designed to provide for the orderly conduct of
racing events and to establish minimum acceptable requirements for such
events. These rules shall govern the
condition of all events, and by participating in these events, all participants
are deemed to have complied with these rules.
NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM
PUBLICATIONS OF, OR COMPLIANCE WITH, THESE RULES AND/OR REGULATIONS. They are intended as a guide for conduct
of the sport and are in no way a guarantee against injury or death to a
participant, spectator, or official.
The Race Director
and Track Officials shall be empowered to permit reasonable and appropriate
deviation from any of the specifications herein or impose any further
restrictions that in their opinion do not alter the minimum acceptable
requirements. NO EXPRESSED OR IMPLIED
WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICIATIONS. Any interpretation or deviation of these
rules is left to the discretion of the officials. Their decision is final.
The rules set forth shall be effective for
Hawkeye Downs Speedway’s 2008 racing season.
Management reserves the right to amend, alter, suspend, delete, or
supplement these rules as conditions warrant and without any prior notice. Any changes will be posted in the inspection
area. It is your responsibility to be
aware of changes posted. These rules
shall govern the condition of all Hawkeye Downs Speedway events. Auto racing is a competitive sport, and like
any other sporting event that depends on fan support, there is a great deal of
showmanship and public relations required.
Starting on time, running events in a professional manner, proper uniforms
or attire, racecars brightly painted and the conduct of the competitors both on
and off the track must be established.
Hawkeye Downs Speedway is private
property. Any person on this property
without the permission of the owners or management is guilty of trespassing and
subject to the penalties prescribed by law.
Through your registration you have been given the authority and the
right to be on this property in conjunction with your racing activity
only. However, the management of the
race track reserves the right to revoke and cancel this authority at any time
it is felt that your presence or conduct is not in the best interest of auto
racing, your fellow competitors, the fans, management, or employees of Hawkeye
Downs Speedway.
ALTHOUGH EVERY EFFORT HAS
BEEN DIRECTED TOWARD COMPLETE, UNDERSTANDABLE, AND CORRECT RULES,
AS WELL AS THE SAME FACTORS
IN PUTTING THEM INTO PRINT, HAWKEYE DOWNS
CANNOT POSSIBLY ANTICIPATE
EVERY SITUATION, CIRCUMSTANCE, OR INTERPRETATION.
THE DEFINITION OF STOCK
MEANS "NO MODIFICATIONS TO FACTORY PARTS OR FACTORY SPECIFICATIONS."
HAWKEYE
DOWNS
ANY
COMPETING CAR AT ANY TIME REGARDLESS OF FINISHING POSITION
GENERAL SAFETY RULES FOR DRIVERS
1. Snell
SA 95 or SA2000 helmet required and must be worn at all times car is on the
track.
2. SFI
approved full fire suit, fire retardant neck brace, gloves, and shoes required.
3. Head and neck restraints receive a 25 lb
weight deduction on total weight. Fire retardant head sock and underwear
recommended.
4. Driver’s eye protection mandatory. Full
Face Helmets or Goggles Mandatory.
5. Minimum
three inch wide five point safety belt assembly required. Must be mounted securely to roll cage. Recommended no more than 1 year old.
6. Driver
side window net required, minimum 16 inch X 20 inch ribbon or mesh style. Must be mounted so latch is at top front of
window.
7. Kill
switch required within easy reach of driver and must be clearly marked 'OFF'
and 'ON.'
8. Driver or Spotter must monitor VHF Frequency
151.625, failure to do so will result in disqualification. Frequency must be registered with
Track Officials, who will also monitor
communications. Two-way radios are
optional. Spotters are required to be in the turn 3 spotter stand.
FRAMES/CHASSIS
1. OEM complete, 1964 or newer, perimeter
American rear wheel drive passenger car frame only. No sports car frames.
2. Frames must be full and complete, cannot be
widened or narrowed. Must be able to
support roll cage on both sides.
3. Minimum wheelbase is 108 inches, maximum
112 inches, both sides, measured center of front hub to center of rear hub.
4. Maximum overall width (front or rear) shall
not exceed 67 ˝ inches from center of tire to center of other tire.
5. Minimum ground clearance to bottom of frame
side rails and body is 4 inches.
2008 HAWKEYE DOWNS
ROLL CAGE
1. Must consist of continuous hoops, minimum
1.75 inch OD tubing, with minimum wall thickness of .095 for main cage.
2. Must be mounted to frame in at least six
places.
3. Must consist of a configuration of front,
rear, and top hoops, connected by tubing on sides or side hoops.
4. Driver's head must not protrude outside
cage with helmet on.
5. Roll cage must be securely supported and
braced with minimum one cross bar in top halo.
6. Foot protection bar required. Foot
box must be plated with minimum 1/8 inch steel.
7. Main cage no further forward than rear of
engine. All bars forward of cage must be
lower than hood.
8. Roll Bar padding required in driver's
compartment (Fire retardant recommended).
DOOR BARS
1. All driver side door bars
and uprights must be minimum 1.5 inch OD and .083 inch wall thickness.
2. Minimum three driver side
door bars, parallel to ground and perpendicular to driver, and welded to front
and rear of roll cage.
3. Passenger side must have at
least one cross door bar, horizontal or angled, minimum 1.25 inch OD and .083
inch wall thickness.
4. Passenger side must have at
least one top door bar, minimum 1.5 inch OD and .083 inch wall thickness.
5. Steel door plate, 18 gauge
or .049 inch minimum thickness, must be securely welded to outside of driver
side door bars
and cover area from top
door bar to bottom door bar, and from rear hoop down-post to 5 inches in front
of seat. Must be visible for inspection.
BODIES (See last page for IMCA 2008 Body Diagram) except as below.
1. All cars will be required to display a
package of sponsor decals supplied by
2. Must
be same width, front to rear, and parallel to OEM frame
3. Engine
compartment must remain open (no side panels).
4. Hood
must be enclosed at rear. Maximum
hood drop (sides) 6 inches
5. No
panel in front of right door to engine compartment.
6. No
inner panels, no car covers.
7. Must
have front windshield and rear window support posts. May use Lexan in opera
windows. May use full windshield and rear window.
8. Driver
and passenger side windows must have at least 12 inch opening, measured at
center of window, between lowest point at top of window,
whether
roof or roll cage, and highest point at bottom of window, whether interior or
body.
9. Sail Panels: Must be a minimum of 24 inches
long and a maximum length to the top of rear spoiler (3 inches tall).
10. Body panels (including roof)
may be fiberglass, steel, or aluminum.
Roof
must be rounded in all directions.
11. Three (3)
inch, single plane spoiler. No ground effects or aerodynamic devices.
12. Minimum 4 inch clearance required on bottom
of doors and quarter panels with plastic skirting allowed.
13. Outside of tires must be widest part of car.
14. Nose panel can be no wider than the frame
horns, minimum 24 inches.
15. Front nose edge/bumper may be no more than 42
inches in front of wheel center and no lower than 4 inches off the ground.
16. See Hawkeye Downs General
Rules for car number placement.
DRIVER COMPARTMENT
1. Must have minimum 3 windshield bars in
front of driver.
2. Lexan or aluminum panel in front of driver
can be no wider than cockpit and no farther back than steering wheel.
3. Minimum .125 inch aluminum or .060 inch
steel complete floor pan required.
4. Aluminum
High Back Racing Seats only. Must be
bolted to frame and roll cage.
5. Driver
must be sealed off from track, driveline, engine, fuel cell, canisters and
pumps.
6. Oil
coolers must not protrude above interior.
7. No driver-adjustable chassis tuning devices
allowed while the car is in competition except for a brake bias adjuster.
8. Mirrors
allowed. Mirror driving or blocking is not
allowed.
9. No fuel lines passing through interior.
10. All cars must have an approved fire
extinguisher with its equipment within ready reach for any emergency. (See
General Rules).
11. Drivers must monitor VHF Frequency
151.625.
FRONT SUSPENSION &
STEERING “Sliders in year 2011 add 25 lbs.”
1. All components must be steel, unaltered OEM
with exceptions below.
2. After market tube type upper A-frames may
be used.
3. Lower Control Arm must be production unit
mounted in unaltered frame mounts.
4. After market ball joints may be used.
5. Steering "drag link" may be
replaced with track approved all steel "slider" assembly. "Slider" must be replaceable with
stock drag link.
6. Cockpit steering may be modified, but must
be kept on left side.
7. Stock design cast or forged
steel spindle, with minimal altering, must be used.
8. Collapsible steering shaft recommended.
9. Center
of steering wheel must be padded.
2008 HAWKEYE DOWNS
SHOCKS
1. One steel, unaltered shock per wheel.
2. No Schrader or bladder type valves. No
threaded body, front coil over, air, or remote reservoir shocks.
3. Shock must be available for
$150 or less.
SPRINGS
1. One steel, non-progressive coil sprint
and/or steel leaf spring per wheel.
2. All coil springs must be at least 4.5
inches OD
3. No torsion bars or air bags
REAR SUSPENSION
1. All components must be steel.
2. No covers allowed.
3. All trailing arms/link bars must be solid
tubing.
4. Rear of frame may be altered to accept leaf
or coil springs.
5. Steel coil over eliminators, or steel/aluminum
coil over kits allowed. Must conform to shock and spring rules.
6. No rear sway bar, chains, or cables.
7. No
independent rear suspension.
REAR END
1. Any steel approved OEM passenger car or
truck rear end allowed.
2. Safety hubs (floater) allowed.
3. Steel axles only. No gun drilled axles.
4. Inspection hole in housing is required.
5. All components must be steel except:
lowering blocks, axle caps, drive flange, and spools.
6. No Quick Change
devices.
7. No
torque dividing differentials.
8. Cambered Rear Ends and "Detroit Lockers" are
acceptable. One (1) piece drive plate only. Constant velocity
drive plates are not allowed.
9. Locker not allowed in 2009.
BUMPERS/RUB RAILS
1. Steel bumpers must be used on front and
rear, and must be welded, or mounted with minimum .375 inch bolts.
2. Bumper must be minimum 1.25 inch OD tubing,
.065 inch wall thickness on front, .095 wall thickness on rear.
3. Two bar front bumpers must be mounted frame
end to frame end, no wider than width of material outside frame horns,
and with bottom loop parallel to
ground. Top bar must be directly above
bottom bar, minimum 6.5 inches apart, measured center to center.
4. Rear bumper and nerf bars may be no wider
than tires.
5. Measurement from ground to center of front
and rear bumpers: Minimum 16 inches, Maximum 20 inches.
TIRES
1. All cars
use 8 inch Hoosier F 75 tires.
2. All race tires must be declared in the tech
barn prior to use, otherwise driver can be penalized. (Consult 2008 Tire Sales Rules/Limits)
3. No heating, soaking, softening, grinding,
buffing or changing the composition and character of tire allowed.
WHEELS
1. 8 inch steel wheels
only. Minimum rim weight is 19 pounds.
2. Aluminum or steel spacers only.
3. Rim mounted bleeder valves allowed.
4. Wheel Weights NOT
allowed.
BRAKES
1. Must be steel approved OEM, operative four
wheel, drum or disc.
2. Must maintain minimum OEM dimensions for
hubs/rotors and calipers cannot be lightened.
3. Bolt pattern may be changed. Larger studs allowed.
4. Rear rotors may be aftermarket, minimum
.810 inch thickness.
5. Vented
rotors only, no scalloped or ceramic coated rotors.
6. No brake shut off or pressure sensitive
devices.
7. One proportioning device allowed, front to
rear only.
8. Brake lines must be visible.
2008 HAWKEYE DOWNS
EXHAUST
1. Headers allowed, and may be coated in any
material. Header and exhaust heat wrapping allowed. Maximum outside
diameter 1 3/4 inches.
2. It is
highly recommended to use the headers recommended by the crate engine
manufacturer.
3. Mufflers must be used to meet track noise
reduction rule of 98 db.
4. No exhaust sensors.
5. All
primary header tubes must enter directly into one collector at same point at
end of header.
6. Tri-y
headers or merge collectors must not retail over $750. Weight penalty for 2009
is 20 lbs., 2010 weight penalty is 25 lbs., 2011 weight
penalty is 30 lbs., is added to “base weight” and in 2012 tri-y and
merge collectors are not allowed.
7. A conventional
crossover header that merges 2 into 1after the collectors is not considered a
merge system and is acceptable.
FUEL SYSTEM
1. Mechanical OEM type
push rod fuel pump only, must be mounted at front
of engine in stock location.
2. Racing Fuel Cell only, maximum 22 gallon
capacity, minimum 18 gauge steel container.
3. Fuel Cell must be securely mounted behind
rear axle, between rear tires, minimum of four inches ahead of bumper.
4. Minimum Fuel Cell ground clearance is 10
inches.
5. Fuel cell must be mounted with minimum two
.125 inch thick solid steel straps, two inches wide around entire cell.
6. All Fuel Cell mounts must be steel,
securely welded to frame.
7. Protective tubing must cover rear and
extend past both sides of cell. No part
of Fuel Cell shall be lower than protective tubing.
8 Fuel Cell vents, including cap vent, must
have check valves. If fuel cell does not
have an aircraft style positive seal filler neck/cap system – a
flapper,
spring or ball type filler rollover valve is required.
9. Pick-ups must be on top or right side of
cell.
10. Limit of one fuel filter.
11. No cool cans.
FUEL
1. All Modified competitors must use unleaded fuel
approved by Hawkeye Downs Speedway.
2. No
performance enhancing additives allowed.
3. Penalty
for illegal fuel, per HDS, is disqualification and $250 fine for first offense.
WEIGHT
1. All Weights determined by track scales only.
2. Minimum Base Weight 2575 pounds.
3. Must have minimum weight printed on upper
left hand corner of driver's door (minimum 2 inch tall numbers)
4. Maximum
left side weight percentage 56 percent.
5. No
weights and/or loose objects in driver compartment or outside body.
6. Weights
must be securely mounted to frame or roll cage with at least two 1/2 inch
bolts. Weight must be painted white with
car number on it.
7. No
titanium, magnesium, or carbon fiber products.
Steel fasteners only.
BATTERY/STARTER
1. One
12 volt battery only.
2. Batteries
must be shielded and securely mounted between the frame rails.
3. Car must have capability of starting
without being pushed or pulled. Must
leave initial staging area on demand, unaided, or go to rear of that race.
4. Reverse mount starters with OEM case
transmissions only. See transmission
rules for specifics.
GAUGES/ELECTRONICS
1. No
transmitting or listening devices, timing retard controls, or digital gauges
(including tach).
2. No
electronic monitoring computer devices capable of storing or transmitting
information except analog tach.
3. No
additional ignition accessories allowed.
4. No traction control devices of any kind
($1,000 fine per HDS).
DRIVE SHAFT
1. Minimum 2 inch diameter steel drive shaft.
2. Drive shaft must be painted white.
3. At least one (2 recommended)
drive shaft hoops required. Hoops must
be within 6 inches of Front U joint.
2008 HAWKEYE DOWNS SPEEDWAY MODIFIED
RULES--PAGE 4
TRANSMISSION
1. Must have at least two forward gears and
one reverse, plus a neutral position.
2. With engine running and car still, must be
able to engage car in gear and move forward, then backward.
3. OEM production type or IMCA approved after
market transmissions allowed--2 speed, 3 speed, 4 speed, and automatic.
4. No five speed or more transmissions. No "in and out” boxes or quick change
devices.
5. Functioning shift levers must be in OEM
location on all OEM production type transmissions.
6. All belt drive pumps must be mounted on
front of engine.
7. Flexplates must be full, steel, unaltered
OEM or OEM replacement.
8. Flywheel/Flexplate must bolt to engine
between clutch assembly and crankshaft.
9. All driveline components within bellhousing
must rotate while car is in any gear.
TRANSMISSIONS
MUST BE ONE OF THE FOLLOWING DESIGNS:
MANUAL
TRANSMISSION
1. Must have standard OEM case and working
disc type clutch or approved cone or disc type coupler inside an explosion
proof steel bellhousing.
2. One flywheel only, minimum 8.5 inch
diameter.
3. Diameter of clutch disc must be a minimum
of 5.5 inches
4. Clutch assembly must be steel, except
housing, which must be steel and/or aluminum.
5. Bellhousing can have only a hole for throw
out bearing lever or hose must be 270 degrees around top of clutch and flywheel
area.
6. Standard or reverse mount starter
allowed. Must directly engage flywheel.
MANUAL STOCK TRANSMISSION
Option 2 (25lbs “Base Weight Break”)
1.
Unaltered three or four
speed OEM production transmission.
2.
Started must be mounted
in OEM location.
3.
Any shifter(s) and
shifter rods to transmission may be used.
4.
Clutch must be 7.25 inch
minimum diameter or larger.
5.
Pressure plate bolted
directly to stock “602” crate flywheel/flex plate. These components must
rotate, consistent with engine rpm, while car is in any gear.
6.
Must use explosion-proof
steel bell housing with hole for throw out bearing fork lever or hose for
hydraulic throw out bearing, bell housing must be 270 degrees around top of
clutch and flywheel/flex plate area.
AUTOMATIC
TRANSMISSION
1. Must remain in OEM or OEM replacement case,
with a functioning OEM appearing pump.
2. Must have approved scatter shield,
constructed of minimum .125 inch by 3 inch steel, 270 degrees around flex
plate.
AFTERMARKET
TRANSMISSION
1. Must be HDS approved, aluminum case, with
internal clutch (Includes Richmond T-10, Winters 60100L, Brinn 70001, Bert
LMZ Plain)
2. Must bolt to explosion proof steel
bellhousing, and use full, steel, unaltered OEM flex plate.
3. Starter must be mounted in OEM location.
4. No coating or paint allowed on transmission
case.
ENGINE COMPARTMENT
1. Rear of engine (bellhousing
flange) must be mounted at least 72 inches forward from centerline of rear
axle.
2. Minimum 11 inch engine
height from ground to center of crankshaft.
3. Engine offset must be kept
within 2 inches of centerline of front cross member with engine level.
4. Radiator must be mounted in
front of engine.
5. Cooling system may be
modified. Overflow tubes must be directed to container.
6. No vacuum pumps.
7. Use of anti-Freeze is strictly prohibited
and will result in $500 fine.
ENGINE
1. All
Modified competitors must use unaltered GM "Factory Stock Crate
Engine" P/N 88958602.
2.
All rebuilt motors must be
declared in the tech barn prior to use and must report bore to HD before start
of racing season.
3. Bore penalty = 5lbs per .010 Examples: .030
add 15 lbs and .060 add 30 lbs. 2009 All GM parts must be used for rebuilds.
4. Hawkeye Downs officials reserve the right to
impound and/or replace any competitors crate engine at any time.
5 Any
engine found to be tampered with results in loss of all points for the season
and confiscation of engine by Hawkeye Downs.
6. Protest
fee to open crate engine is $1000. If engine found to be legal, resealed engine
will be returned to competitor. If Engine is found to be illegal,
$1000 will be returned to protestor Hawkeye Downs will confiscate
engine.
2008
HAWKEYE DOWNS SPEEDWAY MODIFIED RULES--PAGE 
5
CARBURETOR
1. All
cars use 650 cfm Holley 4150 HP P/N 80541-1.
Carburetor must remain "Box Stock." Fine tuning of carburetor is allowed,
utilizing only Holley replacement parts, but is limited to: Jets, Bleeds,
Needle and Seat, Emulsion Bleeds, Power Valves, Accelerator Pump Nozzles, and
Accelerator Pump Cams. Physical changes
of permanently attached carburetor parts (Boosters, Throttle Plates, Throttle
Body, Shafts, Metering Blocks, etc.), or alterations by means of machining,
reshaping, or the act of allowing increased airflow as a result of additional
measures, are not allowed.
2. One, 1 inch, 1 piece,
non-porous Carburetor Adapter/Spacer plate allowed.
3. Carburetors must be securely
fastened to the intake manifold with only one singular .0625-inch (1/16”) or
smaller flange gasket allowed between the carburetor and spacer and one between
the spacer and the intake manifold. NO EXCEPTIONS.
4. Hawkeye Downs officials have the
right to exchange carburetors between anyone.
5. Any carburetor found tampered
with will result in disqualification from event and confiscation of carburetor.
6. Refusal to allow confiscation
or exchange of carburetor will result in disqualification from event.
7. Assume your carburetor
after any feature win, will be swapped with a random competitor.
HDS 2008
Modified Body Dimensions
2008 HAWKEYE DOWNS SPEEDWAY MODIFIED
RULES--PAGE 6