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Mid Atlantic Sportsman Series 2012
Rules - 1/22/2012
- Draft 1. Competing Models 1970 or newer American cars listed below,
chassis and body must match, and be listed below. General Motors
Ford
Monte Carlo
Thunderbird
Camaro /Firebird
Torino Cutlass
Regal Grand Prix
2. Body A.
Bodies must be mounted in stock
location. B.
Front nose, grilles and rear bumper may be
plastic. C.
Hood may be fiberglass, no openings permitted D.
Must have stock floor pan. Right
side may be raised to allow for exhaust clearance only. E.
Must
retain Front and rear firewalls, all openings must be sealed. F.
Full windshield must be used,
must be made of at least 3/16” Lexan, and have at least 2 internal supports. G.
Rear window may be used, must be
made of at least 1/8” Lexan, and have at least 2 external supports. H.
Rear
spoiler may be used, must be no wider than 54”, Maximum height of 5 inches, must be
¼” Lexan, and securely anchored. I.
Must
have a complete dashboard, may be fabricated, must be steel. J.
Front & Rear Hood Pins must be magnetic
Steel. 3. Frame and roll
cage A.
Must have stock wheel base, minimum 105
inches B.
Wheel base must be within 1” side to
side C.
Tread width maximum 68 inches D.
Frame must be stock for vehicle
type, frame dimensions must remain stock between rear kick ups and front suspension.
Fabricated “tubular frames” may be used only in front of the front suspension,
and behind rear frame kick ups. E.
Minimum
4” ride height, measured to frame rail F.
Refer to NASCAR rule book for
safety and roll bar information G.
An A&B transponder is
required to be installed 14’ 2” from the leading edge of the front bumper 4. Weight A.
Cars must weigh at least 3250
pounds with driver at qualifying, minimum left side weight 55%. B.
Added weight must be securely
bolted in place with a minimum of two 3/8” bolts. C.
It is recommended that weight
should be added between the rear axle and front spindles, and mounting must be acceptable
to track officials. D.
The weights must be painted white
with the car number on all sides. E.
All added weight must be in solid
block form. 5. Front Suspension
and Steering A.
Steering components must be stock
OEM type steel components, no aluminum parts. B.
Stock OEM type steering box must
be used, and bolt in the OEM location. C.
Lower A-arms must remain stock or
aftermarket OEM replacement type and be the same length on both sides. Mono-balls not
allowed, tubular components not allowed. D.
Only stock, OEM type, solid steel
sway bars are permitted, no multi-piece or aluminum parts. E.
Springs
must be mounted in stock location; no coil-overs permitted; Jackscrews are permitted. F.
Tubular steel ,fixed length,
upper control arms are permitted; mounts may provide vertical adjustment only, shaft must
be steel. G.
May install larger or screw in
type ball joints but must mount in stock location. H.
No Adjustable style ball joints
permitted. I.
Center of the steering wheel must
be padded. J.
Quick release steering wheel
coupler is mandatory. K.
Aftermarket power steering pumps
permitted. L.
Collapsible steering shaft or
multiple u-joints required. 6. Rear Suspension and Drive Train A.
Stock OEM 3 or 4 speed transmissions. No
aftermarket allowed. All Gears must function. B.
Automatic transmissions are allowed, must use a
torque converter with 10” minimum diameter, must use transmission blanket or steel
shield. C.
D.
Steel flywheel is required. E.
Single or Double disc clutches only F.
Only stock OEM type steel drive shaft is
permitted, minimum of 3” diameter. No aluminum drive shafts. Drive shafts must be
painted white. G.
Drive Shaft must have 2 safety loops made of
¼” thick and 1” wide solid steel. Must be located 6 inches to 12 inches from
each universal joint. H.
Acceptable Rear ends – 9” Ford, 10 or 12 Bolt General Motors I.
3 Link suspension permitted J.
Pan hard bar is permitted, must be steel. K.
Trailing arms must be steel. No truck arms. L.
Top bar must be steel 7. Brakes A.
Must be stock steel production or
aftermarket stock steel OEM replacements only. No Aluminum components. B.
No high-performance aftermarket
or racing calipers allowed. Maximum of 1 piston per caliper. C.
Four-wheel disc brakes permitted. D.
One brake adjuster permitted. E.
Dual master cylinders permitted. F.
No after market lightweight
drilled or cross cut rotors allowed. G.
No brake fans allowed 8. Shocks A.
Any AFCO 12 or 14 series shock or
Pro Shock WB series B.
One steel bodied shock per wheel.
Maximum shaft diameter is 5/8”. C.
May relocate front and rear
shocks. D.
No re-buildable, re-valveable, or
adjustable shocks allowed. E.
On AFCO 14 series shock, coil
overs are not permitted 9. Electrical A.
Wet Cell battery must be
installed in an enclosed metal or plastic box, located in front of the rear axle housing
or behind the driver’s seat. The battery box must be mounted inside the frame rails
and cannot extend below the bottom of the frame rail. The battery mounting position must
be acceptable to Track Officials. Dry Cell battery does not need to be enclosed in box. B.
A
battery master switch must
be mounted in center of dash and labeled ON/OFF. C.
Aftermarket starters are
permitted. 10. Engine A.
Stock, OEM standard production, cast iron
engines only. B.
Casting numbers must be visible, any block
with casting numbers ground off will be deemed illegal. C.
All engines must be located so that the
center of crankshaft is on centerline of the frame and tread width. Front spark plug must be within 1 inch of the
center of upper ball joint. D.
Displacement GM block with a maximum displacement of 361 Cu
In only. Ford block with a maximum displacement of 363
Cu In only. E.
Pistons 1)
Stock production replacement cast or forged
pistons permitted, flat top pistons only. 2)
Minimum deck height of zero. F.
Rods 1)
Stock OEM production or stock replacement steel
rods only. 2)
Must be stock length, GM – 5.7”,
Ford – 5.96” only 3)
No polishing, lightening, or altering rods. G.
Crankshaft 1)
Stock production OEM or OEM replacement cast
Iron cranks. 2)
No modifications permitted, no cutting down
of counterweights, polishing, or lightening in excess of balancing. H.
Camshaft 1)
Only standard hydraulic camshafts allowed, no
roller cams, no solid lifters 2)
Lifters must be steel I.
Timing Chain 1)
Double roller timing chain allowed. Gear or
belt drive timing systems not permitted. J.
Ignition 1)
Any OEM HEI or point’s type distributor
allowed. No MSD, crank triggers, magnetos, etc. permitted K.
Lubrication 1)
Stock production assembly only, no Dry Sump
systems, no Acusump. 2)
No oil coolers or remote filters. L.
Heads 1)
No aluminum heads permitted. 2)
No porting, polishing, acid porting,
coatings, etc. permitted. 3)
Three (3) angle valve jobs permitted using
normal machining procedures. No cutting in pockets. 4)
Guide plates and screw in studs permitted. 5)
Aftermarket valves must be same shape and
size as factory. No Undercut valves. 6)
Stock type or roller rocker arms permitted,
1.5 or 1.6 ratios only. 7)
Minimum 58 CC combustion chamber 8)
General Motors permitted heads Any GM steel production head World Products brand head permitted: S/R Torquer -
170cc runner 9)
Ford permitted heads Any Stock steel production head offered on a
2-barrel version of the motor used. World Products brand head permitted: Windsor Jr – 180 cc runner M.
Intake 1)
Edelbrock Performer series only, no
modifications allowed 2)
General Motors - #2101 or 2116 (Vortec Heads) 3)
Ford - #2750 or #2181 N.
Carburetors 1)
Model 2300 2bbl carburetor, 350 CFM Holley part
#7448 with 1 3/16” venturi, or 500 CFM Holley part #4412 with 1 3/8” venturi.
Carburetor must pass Go/ No Go gauge. Throttle bore must be no larger than 1 11/16”. 2)
All air leaks must be sealed by use of epoxy
or other permanent method. Any attempt to pull outside air other than through the venturi
is not permitted. 3)
No HP metering blocks permitted. Metering
block must be stock Holley units. (Specifications for a stock metering block can be found
on Old dominion speedways website, under late model rules) 4)
No reshaping, polishing, grinding or drilling
allowed. No adjustable (jetted) air bleeds or circuits. Gaskets must remain unaltered. No
chrome carburetors. 5)
Choke may be removed, power valve may be
changed, accelerator pump cam, and accelerator pump discharge nozzles may be changed and
the jet size may be changed. Idle holes may be drilled in the butterflies. 6)
Only a one-piece solid aluminum carburetor
spacer, a minimum 0.700 inch, maximum 0.750 inch in thickness, must be installed between
intake manifold and carburetor. Adaptor must not offer any adjustments, Suggested part #
Moroso 64966 or similar. 7)
The spacer must be centered on the intake
manifold and have two (2) round holes located in the center that match the base of the
carburetor. Carburetor must be centered on the spacer. Holes
must be cut perpendicular with the base of the carburetor. 8)
A one-piece two hole paper gasket maximum
0.065 inch thickness that matches the exterior dimensions of the carburetor throttle base
plate, must be installed between the carburetor and spacer. A one-piece paper gasket
maximum 0.065 inch thickness must be installed between the spacer and intake manifold. The
gasket must be no larger than the top of the intake manifold. 9)
Round dry paper element, min. 12 inches,
maximum 17 inches in diameter permitted. 10)
Element
must be minimum of 1-1/2 inches, maximum 4 inches in height. 11)
No
carburetor hats, ducts, baffles, etc. 12)
Air
cleaner must not protrude through hood. 13)
No
cooling, spraying, or altering of air cleaner. 14)
Bottom
of air cleaner cannot be above choke horn. 11. Exhaust A.
Headers are permitted. B.
Exhaust pipes must extend past driver. C.
No Cross over pipes or flex pipes are
permitted. D.
Magna Flow muffler #12298 (3” inlets on
all cars). E.
Car exhaust system shall have one Magna Flow
performance muffler installed. The installed muffler will function as a
“Y-pipe”, with the output of each header connected to the dual muffler inputs,
and the single output of the muffler connected to tail pipe 12. Cooling A.
Engine mounted fans, if used, must be
operational and belt driven from the crankshaft. Free spin or clutch type fans will not be
permitted. B.
Electric engine cooling fans are optional. An
electric fan can be used in place of a mechanical fan or in conjunction with one. C.
If an engine-driven fan is used, it must be a
standard magnetic steel fan with a minimum of four (4) blades. Removal of the fan blades
or fan belt will not be permitted. The fan blades must be a minimum of 3 1/2 inches wide.
Flat fan blades will not be permitted. The shroud must follow the entire circumference of
the fan and must not extend more than one (1) inch rearward of the trailing edge of the
fan blade. Flat panels will not be permitted. D.
The radiator overflow pipe must be relocated to
the lower right side of the windshield. E.
The radiator must be centered to the water
pump. No offset. F.
Aluminum radiators are permitted. G.
Use of Anti-Freeze is not allowed. H.
Stock OEM type steel, belt driven water pump
only. I.
Aluminum pulleys allowed. 13. Fuel System A.
Use of racing fuel permitted. B.
No additives permitted C.
Refer to NASCAR rule book for
fuel cell construction, minimum 8 gallons, maximum 22 gallons 14.
Wheel & Tire Old Dominion Speedway A.
Wheels must be 15-inch diameter five lug
magnetic steel wheels B.
Wheels must be 10-inches wide C.
Bleeder valves will not be permitted. D.
Offset must be same on each side E.
Only OEM bolt pattern wheels and hubs may be
used F.
Tires will be 10” Hoosier
tires G.
4 new tires permitted per car for
the season, no more than two can be purchased after the 4th race. H.
Only used tires obtained from ODS
will be allowed. I.
Old Dominion Speedway will
provide used tires for a nominal mounting charge. J.
No limit on the number of used
tires. 15.
Competition policies A.
The first place finisher will
start in last place at their next race. B.
Winners of 2 consecutive races
will be required to add 50lbs to their car weight. C.
Time permitting, as determined by
the track, all cars will qualify D.
Starting order will be determined
by pulling a pill, of up to half the number of cars to determine the inversion, (i.e. with
10 cars, there will be 5 pills, and maximum inversion will be 5 cars) E.
The attached tech sheet must be
completed prior to the first race a car is driven in 16. Minimum Inspections A.
All cars will be weighed prior to
qualifying each week B.
Each week parts will be selected
for inspection on the top 3 finishers, by drawing, from the following items 1)
Tire Hardness & Serial
Numbers (every week) 2)
Carburetor, Adaptor plate &
Intake 3)
Lifters, Rockers, and Valve
springs 4)
Displacement, location, cast iron 5)
Ignition & Shocks 6)
Steering components 7)
Rear suspension 8)
Wheel Base, Tread width &
ride height 17. Infractions A.
First infraction, Driver will be
disqualified for the race. B.
Second infraction, all points
earned previously during the season will be forfeited. 18. Pending for 2013 A.
A 1” pipe thread plug must be
installed in the side of the oil pan, providing a view of the 1,2 counterweights or 7,8
counterweights, to allow for inspection of crank and rods without removal of engine. 19.
Change History A.
February 12, 2011, reformatted, renumbered B.
January 22, 2012, updated to reflect 2012
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