2008 LATE
MODEL 9-1 ENGINE RULES
Chief Tech: Don Burkey (319) 929-6979
Race 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
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
MANY 2008 LATE MODEL RULES
ARE ADOPTED FROM ASA LATE MODEL NORTHERN DIVISION RULES AND MAY BE DIFFERENT
FROM PREVIOUS YEARS
2008 HAWKEYE DOWNS
9-1 RACING ENGINE
1. Any cast iron domestic engine, of
standard production corporate model, may be run in any body style of standard
production. No plastic or alum
2. GM engine must be located so at least 1
spark plug hole is even with or forward of a line projected between the upper
ball joints with the caster, right and left, at zero degrees and the frame rail
level.
3. Engine
set back for other make engines is as follows: Ford Cleveland - 4 inches, Ford
Windsor and Chrysler - 2 inches.
4. Engines
may be offset 2 inches, measured from the centerline of front tires.
5.
No external oil pumps or dry sump systems. Altered oil pans, oil coolers optional.
6. No
roller cams, no hard face overlay cams or mushroom tappets. Maximum valve lift .600 inch at valve.
7. No
automatic cam timing devices; no belt drive.
TIMING CHAIN ONLY
8. After
market harmonic balancers allowed.
9. ENGINE
DISPLACEMENT ENGINE
BLOCK BORE SIZE
GM & Ford Maximum: 363 GM & Ford
Minimum: 350 GM
& Ford: Maximum: 4.060inch Minimum:
4.000inch
Chrysler
Maximum: 372 Chrysler Minimum: 340 Chrysler
340: Maximum: 4.100inch Minimum:
4.040inch
10. No
180 Degree crankshafts Chrysler
360: Maximum: 4.060inch Minimum:
4.000inch
11. CYLINDER
HEADS
A. Must be cast iron 2 valve per cylinder.
No
Chevy Vortec/L31 heads, no FORD Motorsports N351 heads.
Fords
may use Part No: 5302 or 53040 Cylinder Heads as produced from World Products.
B. Unaltered*,
O.E.M. original "as cast" form.
Any evidence of sanding, polishing, relieving, grinding, porting,
chemical treating,
abrasive blasting, alterations
to the original form, or the addition of material to the ports or combustion
chambers, is not allowed.
Multiple
angle valve grinds permitted. Maximum angle of any cut cannot exceed 75
degrees.
Any
cut greater than 60 degrees must be done with a steel cutter (no stones).
C.
The maximum allowable valve diameters
are.....
All
heads except Ford Cleveland: Intake-2.020 Exhaust -1.625.
Ford
D.
Combustion chambers may be
"cc" matched by reseating valves only.
E.
Intake gasket and head gasket
surfaces may be re-machined (not angle milled) to improve sealing.
F.
Any valve springs and retainers are
permitted.
G.
Valve guide material optional. Guides must remain in original position
H.
Screw in studs optional. Head may be cut for valve seals.
12. Compression
ratio of 9.0:1 is set, 9.5:1 will be declared illegal. Determined by the volume
gauge and electronic sonic tester (Whistler).
13 Stock appearing valve lifter only (no roller
or mushroom type). Diameter of lifter
and lifter bores must be stock as produced for that engine. Lifter bores may be
sleeved.
14. Camshaft
bearings must remain stock babbitt type (no roller).
15. No
Titanium crankshafts, connecting rods, wrist pins, or pistons.
16. No
Aluminum Rods
17. Any
type of rocker arm permitted.
18. No
pumps to create a crankcase vacuum will be allowed
19. Oil
pan access hole with a minimum of 1 inch diameter, for connecting rod
inspection required.
20. No nitrous oxide equipment
INTAKE MANIFOLD
1. All engines may run APPROVED street
application, single carburetor, cast iron, unaltered intake manifolds (Bow Tie
Intake Included)
or-Approved Edelbrock "Victor
Junior intakes (see below). No
modifications or alterations of any kind allowed unless specified
Must be able to easily remove heat shield
from bottom for tech. inspection (Allen Bolts Recommended)
Approved Edelbrock Victor Junior Intakes
Chevrolet: 2972 (4 barrel), 2901(2 barrel). Dodge: 2915 (0340 head), 2920 (W-2 head). Ford: 2980 (4 barrel), 2940 (2 barrel)
CARBURETOR-(STANDARD
LATE MODEL ENGINES AND SPORTSMEN ENGINES)
1. One
Holley 4412, 500 CFM carburetor ONLY. No
alterations of and/or metal removed except enlargement of idle hole in throttle
plate.
2. Choke
housing may not be removed. Choke
"butterfly" may be removed.
3. Carburetor,
adapter/spacer and intake manifold must be non-pours and secure. No home made carburetor adapters.
Any
non-porous aluminum adapter will be allowed (maximum thickness of 1.575 inch
with paper type gaskets).
4. Jets
may be changed. No dial-a-jet devices.
5. Air
box opening at windshield may not exceed 30 inches by 4 inches. Hood must seal
to windshield except for width of air box.
6. All
carbureted air must pass through one air cleaner element. No Foreign Material allowed on air cleaner
element.
7. No
additional fuel reservoir or pressure equalizing systems allowed.
8. Mandatory
DOUBLE throttle return springs working in opposite directions.
9. Stock
type mechanical fuel pump only. Pump
must mount in stock location.
10. Carburetors
will be checked with "Go/No-go" TRACK gauges. Failing these tests
will result in disqualification.
2008
HAWKEYE DOWNS