2008 STAFFORD MOTOR SPEEDWAY
LATE MODEL DIVISION RULES
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AMB, US, Inc
www.amb-it.com 1-678-816-4000
Track Frequency Channel #1 SK Modified®, Late Model 464.50000
Track Frequency Channel #15 SK Light, Limited L.M., D.A.R.E. Stock 461.13750
PREFACE
The rules in this book are intended to make
racing less expensive and keep competition as equal as possible. While these
rules offer a good outline, every item cannot be covered by a written rule. If
you come up with something not covered in the rules, PLEASE ASK FIRST!
All rules in the NASCAR Rulebook will be
enforced with the following changes and additions. These rules are for Stafford
Motor Speedway only with no expressed or implied agreement with any other
speedway as to the interpretation, implementation and method of inspection by
the technical inspectors and officials.
No equipment will be considered as having
been approved by reason of having previously passed through inspection
unobserved. No car will be considered as having passed inspection for the event
until the finish is made official.
NOTE: All engine models,
equipment changes, or modifications not specifically addressed in these rule
books by Stafford Motor Speedway must be submitted to the track for
consideration of approval on or prior to September 2, 2008 unless otherwise
authorized by Stafford Motor Speedway to be considered for competition for the
2009 season. All equipment is subject
to the approval of the track officials.
Track officials may assess penalties including but not limited to
weight, fines, points, or handicapping for cars, car parts, componenets, and/or
equipment deemed as not in compliance with these rules. Car parts, components, and/or equipment will
not be considered as having been approved by reason of having passed through
inspection at any time or any number of times unobserved or undetected. Any car, car part, component, and/or
equipment which does not conform to specifications or tolerances contained in
the 2008 rule books or is not otherwise approved by Stafford Motor Speedway may
not be used in competition in 2008. Any
new part or component to be considered for approval for competition must be
submitted to Stafford Motor Speedway.
The owner/driver must provide all information and/or parts or components
to Stafford Motor Speedway and must provide any part or components to be used
as comparison items for inspection purposes.
DEFINITION OF
STOCK: In
the following Rules you will see the term OEM Stock used. This means Original
Equipment Manufacturer. The parts must come on a standard production car.
Special "Off-Road" or racing parts will not be permitted unless
pre-approved. No carbon fiber or titanium engine, chassis or body parts unless
approved by track officials.
ILLEGAL ITEMS - Absolutely NO removal of,
alteration of, or covering of casting numbers, part numbers, manufacturers
name, logo, insignia, etc., from any item on the race car. To do so makes a
part illegal and will be treated as such. If you come up with a rare part that
we cannot find listed for passenger car use, the burden of proof is on you. At any time you may be asked to remove a
head, manifold or possibly an entire engine for inspection. Failure to comply
will result in the same penalty as if it were illegal.
INSPECTION - All model, engine or equipment changes or
modifications not specifically addressed in this rulebook must be submitted to
Stafford Speedway for consideration of approval. All equipment is subject to
the approval of Track Officials. Equipment will not be considered as having
been approved by reason of having passed through inspection unobserved. Any
equipment that does not conform to specifications or tolerances contained in
this rulebook or is not otherwise approved by Stafford Speedway may not be used
in competition.
POST RACE INSPECTION- Once a
car has been presented to Stafford Technical Inspectors for post race
inspection the entire car and all its parts become subject to inspection. This
includes but is not limited to items designated for inspection following a
particular event.
Scales. For purpose of post
race inspection drivers must be seated
in their car in a racing position with their helmet either on or placed on
their lap at all times. No leaning or hanging on bars is permitted. The driver
must remain in his/her car until it is removed from the scale area.
ABSOLUTLEY NO SOMKING IN THE
FENCED IN TECH AREA.
The rules in this book may be added to,
deleted from or changed at any time with the only notice to be given at the
event drivers meeting or via technical bulletin. All officials’ decisions are
final, non-appealable and non-litigable. Technical bulletins will be issued as
needed.
UPDATES - All changes and updates
made during the course of the season for the current rulebook will be posted to
the Stafford Motor Speedway website. This will serve as the only form of
official notification until the printing of next Stafford Motor Speedway
rulebook.
CONTINGINCIES- Contingency
sponsors are a valuable part of Stafford Motor Speedways program. Contingency
stickers must be displayed for either product or monetary considerations. Each
division will be notified as to what stickers are required to be eligible for
contingency rewards. The stickers MUST be displayed on both sides of the car in
such a manner as to be CEARLY VISIBLE in a photograph.
STAFFORD SPEEDWAY
TRACK RULES
NOTICE
Alcohol will not be permitted in the Stafford Speedway pit or paddock areas at
any time. The consumption of alcohol before, during or after a race event in
the pit or paddock areas is prohibited
SECTION 1-4
All NASCAR Rules will be enforced with the exception of the following
STAFFORD SPEEDWAY TRACK RULES. These rules supersede any similar NASCAR Rules and are in effect for all
auto racing events unless otherwise posted and/or announced prior to the event.
NOTE: Some Track Rules may not apply to touring divisions.
SECTION 6 SAFETY
Stock car racing
is an inherently dangerous sport. Each Competitor assumes that risk when he or
she participates in an Event. The risk of serious injury or death cannot be
eliminated and in fact will always be present at a high level. Members are
required to advise their spouses and next of kin, if any, of this fact.
Although safety is generally everyone’s concern, Stafford Motor Speedway cannot
be, and is not responsible for all or even most aspects of the safety effort.
That responsibility instead rests with the various participants in the Event(s)
as follows.
All competitors
are obligated to inspect the racing facilities, safety personnel and equipment,
and conditions at the track on a continuing basis, before, during and after the
event. Competitors must report to Stafford Motor Speedway management promptly
any inadequacy in the facilities, personnel, equipment or conditions at the
track.
PASSENGERS are not permitted in or on a racecar at any
time. No one shall ride with any part of his or her body outside the racecar.
No riding on trailers or car haulers anywhere on the speedway property.
NEITHER STAFFORD MOTOR
SPEEDWAY NOR TRACK OFFICIALS CAN OR WILL BE RESPONSIBLE FOR THE ADEQUACY OF A
COMPETITOR’S RACECAR, RACING EQUIPMENT OR RACING ACTIVITY TO ACCOMPLISH THIS
PURPOSE.
SECTION 9 RACE PROCEDURE
1. All cars must go
into the infield before turning into the off-track paddock gate except at the
conclusion of the feature event. No right turn from the track to the paddock.
All cars must go through the infield road after each warm-up session and
qualifying event. After feature events cars may go directly into the paddock
area without going through the infield. The first three (3) cars in the feature
finish must report to victory lane. DO
NOT DO BURNOUTS OR DONUTS ANYWHERE ON THE RACE TRACK OR INFIELD AFTER THE
FEATURE EVENT OR AT ANY OTHER TIME.
2. The track crew, officials, wrecker or push truck drivers are not
allowed to work on race cars on the track, infield, pit or paddock areas.
3.
No car will be permitted to pass the caution vehicle unless instructed to
do so by NASCAR Officials.
4.
No car will be permitted on the track at any time without a hood.
5. All owners of cars that the oil pan cannot be removed with the
engine in the chassis must have a carb flange lift plate or other device for
the removal of the engine.
6.
At no time shall a car be jacked up without jack stands with pads being placed
under it except for normal tire changes during the race event. At no time shall a person be permitted to go
under a car without jackstands. This rule applies to both the infield pit and
paddock areas.
SECTION 9.5 HANDICAPPING Note: Some rules do not apply to DARE STOCK Division.
All drivers must
complete a Number Application form before signing in.
For all events your car must be signed
in 45 MINUTES before the first heat race is scheduled. Once the line-ups are
posted no additional cars may be added.
If your car is signed in but does not arrive you may be credited with
two wins for handicap purposes.
When you sign in
your car state your division, assigned car number
and the driver’s name. If you bring two cars, one as a BACK-UP CAR
you must decide and indicate which car will be your primary car when you sign
in. Drivers will be handicapped on a 3-week money won system. For handicapping
purposes regular feature event purses will be used. Any driver that misses an
event will be credited with a regular feature win in money plus 1/2 feature win
in money for handicapping purposes. Any driver disqualified from a feature event will
be credited with a regular feature win plus 1/2-feature win in money for
handicapping purposes. The top 18 drivers in points will be handicapped ahead
of drivers not in the top 18 for the main feature only.
No current
season feature-winning driver may be posted to start higher than fifth
position in a feature event, Except In Rare Instances.
Note: For some events the top ten cars in
points may be considered as pre-qualified. The car must still be signed in 45
minutes before racing starts to take advantage of being pre-qualified.
All alternate feature cars will be taken
from the consolation event. If a car is disqualified from a heat additional
cars will not be taken from heats but from the consolation or ‘B’ feature.
If in the
opinion of the Racing
Director a car is not competitive on a given night, he has the authority
to deny that driver a front starting position.
For additional
handicapping information please ask handicapper for clarification.
PAST CHAMPION’S PROVISIONAL POSITION
One additional starting
positions have been established which will be available to the most recent
Stafford Motor Speedway Champion who has not qualified for the starting
field. If a former Stafford
Motor Speedway champion is not assigned this starting position, it will then be
assigned to the next eligible driver who did not qualify for one of the
original starting positions based on the current Stafford Motor Speedway
championship point standings.
PROVISIONAL POSITIONS
Two additional starting
positions have been established which will be available to the highest drivers
in the current Stafford Motor Speedway Championship Point Standings who have
not qualified for the starting field.
ROOKIE RULES
A. Rookie Rules apply to SK
Modified®, SK Light Modified, Late Model, and Limited Late Models divisions. To
be considered as a rookie you must not have competed in more than five, (5) feature
events in this or a higher division at Stafford Motor Speedway.
B. All cars driven by rookies
must have a yellow stripe on the rear bumper. Rookies may not have another driver qualify a car for them.
C. The current Rookie of the
Year as determined from the previous season, will be awarded $100 each event
starting with the first event of the current calendar year and continuing each
consecutive event until the total award amount for each division is
distributed. To be eligible for the Rookie of the Year award the driver must
attempt to qualify. If the current Rookie of the Year as determined from the
previous season is not eligible for this award, the award will then be
available to the next highest finishing eligible rookie driver in the previous
season Rookie of the Year points standings.
SECTION
9.6 STARTING LINE-UP & RESTARTS
If a car(s) drops out of the posted starting
line-up, all cars in that row will move straight up to fill the spots in all
events. No crossing over. If a restart occurs with ten, (10) laps or less to the end of the
feature, all lapped cars will be removed from and started behind the lead lap
cars in the restart line up.
SECTION
10.4 YELLOW & RED FLAG/LIGHT RULE
The Yellow & Red Flag condition will be used for feature events
where the yellow flag laps are being counted. If in the opinion of the
officials the yellows are using up too may laps the red caution will be used.
The laps will not count against the feature total but if you pit you will lose the amount of laps you are in the pits.
SECTION 10.8 CHECKERED FLAG
- RACE END
All FEATURE races
will end with a GREEN, WHITE, CHECKERED unless
in the opinion of the officials the track is no longer safe for racing.
SECTION
11.1 OFFICIAL SCORING
SK Modifieds®, Late Models, SK Light Modifieds and Limited Late
Models must have a scoring transponder assigned and attached to the racecar for
practice or racing. (Please see installation specifications on page 7). All
competitors will have 15 minutes after their feature event is announced and
posted to file an inquiry. Once the inquiry is satisfied the official finish
will be posted. No changes will be made once the finish is official.
FOR
SALE SIGNS
For
Sale Signs are not permitted on cars in feature events.
BACK-UP CARS – Separate number registration is required
for back-up cars. No cars competing in the same division will be allowed in the
paddock area with the same number.
INFIELD PITTING
1. Infield pitting will be used
for all SK Modified and Late Model features. All crewmembers that go to the infield pit area will be
required to have a NASCAR license. During race conditions, any crewmember who steps
into the car servicing area must wear a helmet All people on the infield must
wear long pants with a minimum short sleeve shirt and closed toe footwear at
all times. You must pit in your proper pit stall.
2.
NASCAR pit rules will apply including the amount of
crewmembers over the wall, etc. A stop & go official will be at the exit of
pit road only. You may not enter pit lane until the pace car picks up the
leaders and the pit road is opened. You may pull up to but not pass the pace
car.
3.
No
crewmember may go into the pit box until the car has come to a complete stop.
4. Pit stalls will correspond to the starting positions of the
feature line up.
5. The speed limit on pit road at all times including qualifying
and practice will be 25 MPH.
Speeding in the pits may result in
disqualification.
6. Absolutely no fueling of cars on the infield. No gasoline containers will be
permitted on the infield.
7. Wreckers and push trucks are not permitted to bring pit
materials to the infield to set up your pit stalls.
8. All
cars out of the event must go behind the wall on the infield.
6- 4 PERSONAL SAFETY EQUIPMENT
See NASCAR WEEKLY SERIES
RULE BOOK
6- 4-1 HELMETS- HEAD AND NECK RESTRAINT DEVICES
See NASCAR WEEKLY SERIES
RULE BOOK
6- 4-2 SEAT BELTS
See NASCAR WEEKLY SERIES
RULE BOOK
6- 4-3 SEATS
See NASCAR WEEKLY SERIES
RULE BOOK
SCORING TRANSPONDER LOCATION
Transponder mounting brackets will be installed on the inside (or outside) of the right rear frame rail. The round post of the bracket must be on top and the square tab on the bottom flush with the lower edge of the frame rail. The bracket must be mounted with it’s center line exactly 12” to the rear of the rear axle centerline and must be completely vertical to the ground. Keep exhaust directed away from transponder.
Transponders are available from
AMB, US, Inc
32 Highlands Parkway, Suite 104
Smyrna, GA 30082
Tel
678-816-4000 Fax 678-816-4001
LATE MODEL DIVISION
ALL 2008 NASCAR WHELEN ALL AMERICAN SERIES RULES FOR THE LATE MODEL
STOCK CAR DIVISION WILL BE ENFORCED FOR THE STAFFORD LATE MODELS WITH THE
FOLLOWING CHANGES AND ADDITIONS.
DRIVER ELIGIBILITY - All drivers must have a NASCAR
CHD (CHARGER DIVISION DRIVER) or higher license. Drivers competing in the LATE
MODEL division at Stafford Speedway will not be permitted in the SK LIGHT
MODIFIED, LIMITED LATE MODEL, or D.A.R.E. STOCK division on the same event
date.
20F- 1 COMPETING CHASSIS - American made chassis with a minimum of
108" wheelbase as factory listed for that year and model. No Firebirds,
Camaros, Mustangs or two passenger sports cars. No convertibles, station
wagons, or use of their frames for other models. Body may different from frame
and engine but engine and frame parts must be from the same corporate line
(i.e. GM, Ford, Chrysler). If you are in doubt about the eligibility of a make
or model, CHECK BEFORE YOU BUILD IT!
20F- 2.1 BODIES – All bodies must be NASCAR approved. See
NASCAR Rulebook Late Model Stock Car Division for approved bodies and
additional body specifications. Original dimensions of all bodies must
remain as manufactured except for changes which may be necessary
for tire clearance. All aftermarket body and trim parts must be
acceptable to Track Officials.
As
of 2008 all Late Models will be subject to the A-B-C body type
measurements. Track officials will use
A-B-C type templates to insure the measurements from car to car are the
same. All measurements from the NASCAR
Rule Book and the A-B-C book are the same. Only the location of the following
two measurements nose height and rear overhang and the letters of the
measurements themselves are different. Tolerance will be built into the
templates from the manufactures. All vertical measurements from either book
will be plus one (1) inch. With the exception of the 18 ¼” min deck lid length all
other measurements that say minimum or maximum shall be considered as exact for
this division. Any other models must be approved by Stafford Motor Speedway.
Older
Late Models and Limited Late Models with higher roof heights will be adjusted
according to the rule. The A-B-C RULE BOOK will
be made available to all 2008 competitors.
20F- 2.2 OVERALL CAR WEIGHT - All specified weight requirements will be with the
driver. The minimum weight at all times will be 3000 pounds. No car will be allowed to have more than 55% of the total weight as the left
side weight. All weight must be bolted to the inside of the frame rail and
above the lowest edge of the frame where weight is mounted.
20F- 2.3 ADDED CAR WEIGHT - Added weight must be in
block form of no less than five (5) pound blocks (no pellets) of magnetic steel
or lead only. Added weight must be securely bolted to the frame rail and
painted white with the car number stenciled in black. No added weight will be
permitted inside the driver’s compartment. Weight must be welded in a box or
attached with two or more grade ‘8’ bolts minimum 7/16 dia.
20F- 2.4 CAR WEIGHTS AFTER RACE - Nothing may be added to or taken from the car to
make total or left side weight. Gas, oil or water may not be added. Wheels and tires cannot be changed,
but an amount equal to one half of one percent (.5%) of the gross weight will
be added for loss in weight due to race wear.
20F- 3 DETAILED BODY REQUIREMENTS – Steel aftermarket replacement bodies may be used in
place of stock. Hood and roof may be made of fiberglass. Steel
front fenders may be replaced with plastic. Fiberglass front
fenders are not permitted. Body
must be, straight and stock, mounted in the stock location on the frame. No
lowering, chopping, channeling or streamlining of any body parts or roof. Stock
window openings must be maintained.
No fiberglass replacement
parts unless noted elsewhere in the rules. All exterior chrome trim ornaments,
outside mirrors and door handles must be removed. Replacement body parts must meet
NASCAR templates. No body skirts or lower body rocker panel flares. Rolled
under rocker panels are recommended. Rear quarter panels may be
plastic or steel only
20F- 3.1.1 FRONT AIR DAM - Approved air dams must
maintain 5” ground clearance.
20F- 3.1.2 REAR SPOILERS - A non-adjustable
freestanding clear polycarbonate glass solid rear spoiler is permitted. Spoiler
will be a maximum of 4" in height and a maximum of 48” in width. Spoiler
must be placed in the center and at the rear edge of the trunk lid. No side
gussets. All spoilers are subject to track approval.
20F- 3.2 GLASS - No side windows allowed. Full windshield is
required made of clear glass or 1/8" polycarbonate glass. Windshield must
maintain stock angle and fit template. Windshield must have two safety straps
on the inside and out. No cracked windshields allowed. All lights and lenses
must be removed from the car. Headlight and taillight openings must be covered.
Headlamp and tail lamp decals are recommended for aesthetic reasons. No tinted side,
quarter or rear windows.
20F- 3.2.2 REAR WINDOW - Full clear polycarbonate glass rear window is
required. Two 1" straps are required inside and outside. Stock angle must be maintained. No tinted
glass.
20F- 3.2.3 SIDE WINDOW GLASS/WINDOW SCREEN – All door window glass must be removed. A nylon window screen must be
installed in the left side door window opening. And be positioned to cover the
entire window opening. The window screen must be rib type, made from minimum ¾
inch, maximum one (1) inch wide nylon material with a minimum one (1) inch and
a maximum 2-1/4 inches square opening between the ribs. The minimum window
screen size must be must be 22 inches wide by 16 inches high. All window screen
mounts must be a minimum ½ inch diameter solid steel rod on the bottom and a
minimum one (1) inch wide by 3/16 inch thick flat steel or a minimum ½ inch
diameter solid steel rod on the top, with mounts welded to the roll cage. The
window screen, when in the closed position, must fit tight and be secured with
a lever-type quick release latch acceptable to Track Officials. The lever must
be secured by a detent ball in the lever and may be supplemented by Velcro®
fastener only – pins or clips will not be permitted. The latch must be mounted
at the top in the front to roof bar (#3) release from the inside.
20F- 3.2.5 REAR VIEW MIRROR - One (1) rear
view mirror that must be mounted at the top of the windshield no larger than 8”
X 2”. No multi-image or side mirrors. Oversized
mirrors maybe blacked out by the use of paint only, to obtain the 8” X 2”
maximum reflective area. Any size or type of spot mirror is not permitted
in any location.
20F- 3.3 DASHBOARD - Stock unit may be removed
but must be replaced with sheet steel, a minimum of 24-gage (0.025 inch thick),
of similar design, and the full width of the body. Per NASCAR
rulebook, all cars should have a removable inspection panel with a minimum size
of 10” (ten) by 10”(ten) or 8” (eight) by 18” (eighteen) on top of the dash on
the driver’s side for inspection of all wiring under the
dash panel.
20F- 3.4 FIREWALLS
A. Front
firewall must be in stock location and be made of minimum .031"
metal with all holes covered using sheet metal a minimum of
.031" thickness. Aluminum is not permitted. The front firewall must extend
down to the top of the frame.
B. Rear firewall must be made
of minimum .031" magnetic sheet metal securely installed over the rear
seat back brace and top shelf or “hat rack”, completely closing off the trunk
compartment.
C. The top shelf or “hat
rack” must be positioned horizontal and approximately level. At a maximum of
30-iches from back to front, the top self or “hat rack” must angle downward
approximately 30-degrees and continue downward attaching to the #6 bar or
lower.
D. The stock floor pan may be
replaced with minimum .031" magnetic sheet metal bent similar to the
original configuration. Any part of the passenger side floor pan higher than
the top of the frame rail is not permitted. The passenger side floor pan may
come straight across from a maximum height of the top of the frame rail, to the
transmission tunnel. The floor must be sealed to the bottom of the door on both
sides of the car. The rear seat area must seal to the rear firewall.
E. The transmission tunnel
shape may be altered however must remain in original center position (equal
distance from frame rails to either side of the tunnel) and within 1-inch of
original height. Additionally the transmission tunnel must remain within
2-inches of stock width.
F. Door bars may not be covered
on the interior of the car and must be visible for inspection from the inside
of the car.
G. Absolutely no closing in of
passenger compartment next to or behind driver.
20F- 3.5 DOORS - Doors
may be steel or aluminum External nerf bars may be used if no larger than 1”
round tubing. Bars must be “skin” tight and painted the same as the body panel
it is attached to. Bars must be at centerline of the front and rear tire. No
bars behind rear wheels. Ends must be turned into and go through the body or bolted at the end
of the bar with a flush bolt that goes trough the body to an interior bar of
the same length as the outside bar to prevent hooking. The outside bar must
have the ends rounded. No spreading or narrowing of body. Replacement
doors must have stock contour. No slab sided cars.
20F- 3.6 FENDERS Front
fenders and rear quarter panels may be either steel or plastic.
20F- 3.7 GRILLES - Grill openings must remain stock for body run.
20F- 3.8 HOODS, ROOF
A.
Hoods may be made of steel, aluminum or fiberglass. The hood and scoop must
seal tight to the fenders and windshield. Hood must be in place at all times
B. Hood must be held
closed with quick release pins. Hinged hoods are permitted.
C. No holes or
functioning air scoops allowed. Hoods must lay flat.
D. No openings for
air to the carburetor or breather are permitted.
E. All
roofs must be the same size and shape of a production roof. Steel or fiberglass
roof permitted. Roof panels must be permanently mounted in the stock position
the same as a stock production roof for the make and model car being used.
20F- 3.9 REAR DECK LIDS/TRUNKS - The rear deck lid / trunk may be steel or aluminum. Fiberglass is not
allowed in these areas. The rear deck lid must maintain the same
dimensions, angles and bodylines as the stock production car. Lid may be held closed with quick
release pins. Complete taillight panel and bumper covers must be run. No flat
back cars. Taillight decals are recommended.
20F- 3.10 BUMPERS/BUMPER COVERS – The bumpers/bumper covers must be acceptable
to Track Officials and meet the following requirement:
A. The front and rear bumpers
and/or bumper covers must be installed in the same location as far as height,
width and depth as a stock factory production bumper.
B. Magnetic
steel tubing must be used to reinforce the front and rear bumper covers. The
tubing must not be exposed and must remain behind the bumper covers.
C. The
front and rear bumpers/bumper covers must be solid. Holes will not be permitted
.
D. All
front and rear bumper covers must be painted the same color as the car
including bolts and rivets
20F- 3.11 IDENTIFICATION – See NASCAR Rule Book. Roof
numbers must read from passenger’s side of car. Stafford Motor Speedway
reserves the right to assign number colors. Numbers must be present
and visible for all events including practice sessions.
20F- 3.12.1 BODY TEMPLATES - Templates may be used to check any cars, which have
questionable, body dimensions or configuration. Decision of Track Officials is
final.
20F- 4 GENERAL ENGINE
REQUIREMENTS -
Engine must be OEM cast iron V8 production block, heads and intake manifold.
The ONLY approved engine for GM is the CHEVROLET 350, FORD is the 351 CLEVELAND
or WINDSOR, MOPAR is the 360. No de-flashing, grinding, welding or painting of
any internal area. Maximum overbore for Chevrolet and Ford is .045".
Maximum overbore for MOPAR is .030”. A max static
compression ratio of 11.5 to 1 will be allowed on the current non-spec Stafford
Late Model Motor with the “492" , “461" , or the
“462" type heads.
The current non-spec
Stafford Late Model Motor equipped with the Dart Heads will have a max static
compression ratio of 10.5 to 1 . This motor will be required to run the 260 GTX
fuel only.
The
Spec Motor will maintain a static compression ratio of 10 to 1. on the 260 GTX
.
20F- 5 DETAILED ENGINE REQUIREMENTS FOR LATE MODEL
SPEC MOTOR
20F- 5.1 ENGINE LOCATION
A. Engine must be in the stock
location for a V8 in the chassis being run. Stock engine location is deemed to
be when the distance between centerlines of the forward most fuel pump to
engine block mounting bolt and the upper idler-arm to frame mounting bolt
measures 8.75” inches +/- .25” inch so long as said bolts are deemed to be in
stock, un-altered, factory locations.
B. The front, centerline of
the crankshaft must be no less than 12 3/4 inches from the ground with the
car’s frame set on five (5”) inch high blocks under all four outer corners of
the frame.
20F- 5.5 PISTONS/RODS
A. Any flat top three
(3) ring round aluminum piston with three (3) rings in place will be
permitted. Valve relief’s for valve
clearance only may be cut into the pistons. All three rings must be of magnetic
steel. No portion of piston may protrude above the top of the block. Effective
for 2008 the minimum ring thickness permitted is as follows:
Compression
rings .043 inch Oil ring assembly 3.0 mm
NOTE: WHEN USING
DART HEADS AS REPLACEMENTS FOR THE CURRENT VERSIONS, YOUR
PISTONS MUST MAINTAIN A MINIMUM FLY CUT OF .150`` Intake & .100`` Exhaust. NO EXCEPTIONS.
B. Only magnetic steel piston pins maintaining a
minimum diameter of 0927 inch are permitted. Full floating pins are permitted.
C. Piston pin holes must be in a
fixed location in the piston and connecting rods.
D. Only two-piece insert style
connecting rod bearings are permitted.
E. Only solid magnetic steel stock
type connecting rods are permitted.
Hollow beam connecting rods are not permitted. All after-market
connecting rods must be steel sportsman rods. Only normal engine balancing and
the use of after-market bolts and nuts are permitted. No de-burring,
de-flashing, polishing, grinding or lightening. Billet connecting rods are not
permitted. All rods must maintain the minimum/maximum rod lengths listed below: