MONTANA 500 RULES
GENERAL RULES
Note: All cars that tour along must meet
the rules flagged with a *.
Note: 2011 Newly adopted or changed rules
in italics.
A. GENERAL INFORMATION
A1. * These rules dated October 16, 2011
supersede all others. They are intended to outline current acceptable practices.
Deviation beyond these practices may result in disqualification. Directors are
responsible for interpretation of all the rules pertaining to the Association.
Decision of the Directors is final.
A2. * All cars must comply with Montana
license and insurance requirements.
A3. * No alcoholic beverages will be
allowed in competing cars. Substantiated violation is cause for
disqualification.
A4. * Drivers performing in an unsafe or
unsportsmanlike-like manner will receive 1 warning. Second infraction may result
in disqualification upon review and affirmative vote of 2/3 of the remaining
drivers.
A5. Not more than two people are allowed
per endurance car while under time.
A6. * All drivers and relief drivers must
be a paid-up member of the MCCTA.
A7. * Tailgating of any kind is not
authorized or condoned by the MCCTA. Drivers must maintain a safe following
distance. No tailgating of support or tour vehicles or any non-participating
vehicles.
A8. *All participating cars must have
attached or placed directly on both sides a sign with name of sponsor or owner
and hometown. Use three (3) inch letters preferred.
A9. *Drivers must drive at or below
posted speed limits.
A10. Drivers are responsible for
following the prescribed route. Failure to travel the entire prescribed route
will result in an assessment of slow time for that leg plus a penalty of fifteen
minutes. Flaggers or signs may be posted as deemed necessary or advisable.
A11. Routes will be planned to avoid
running through stoplights under time.
A12. * All Ts will be available for
subsequent inspections at any time.
A13. * All drivers and relief drivers
must sign an Endurance Run Waiver and Inspection Form.
A14. Every year new lead inspection seals
will be placed on each competing car.
A15. Placement position results for cars
that do not complete the entire endurance run will be based on actual mileage
completed.
B. GENERAL RULES
B1. Body must be painted. Body parts must
be stock for year of car, sawed off tourings allowed. Cars must have four
fenders, splash aprons, running-boards, and if so equipped: front splash apron,
dash, and radiator shell, and all replacement body parts must be made of metal.
Chassis parts may be assembled from any year T parts. Gas tank must be stock for
that year of car and mounted in stock position. No fuel additives are allowed.
Cars must use straight automotive pump gas as fuel during the race time,
starting with inspection and continuing until the end of the race.
B2. All T's must be assembled from stock
parts and/or reproduction parts equal to stock specifications, with the
following exceptions:
B2a. * All competing cars must be
equipped with two headlights and one or more rear stop and tail light in working
order. The stop and tail light does not have to be a single unit.
B2b. * Horn of any type in working order
required.
B2c. * Rear view mirror of any type
required.
B2d. Windshields must be stock for year
of car. No altering. Must have safety sheet or safety plate glass top and
bottom. Windshields to be completely closed and sealed by an inspector.
B2e. * Padded seat and back rest of any
type required.
B2f. Original turtle deck may be replaced
by some type of substantially built box or turtle deck. Minimal length and width
equal to size for stock turtle deck on that year of car, with floor, sideboards
and end-gate. Sides and end no less than six (6) inches high from the floor and
made of no smaller than 3/4" wood.
B2g. Fuel line not to exceed 3/8" I.D.
B2h. * At least 36 inches of 1 1/2"
exhaust pipe required, properly attached to and extending from the exhaust
manifold.
B2i. Only stock cast iron or stock
aluminum or new manufactured intake manifolds with ports not to exceed 1 1/8"
diameter are allowed. No grinding or performance enhancing alterations of the
intake or exhaust ports allowed.
B2j. Only stock Ford roller type, New
Day, Anderson flapper type timers or Crystal timers allowed. Quick couplers NOT
ALLOWED in timer wires.
B2k. Holes must be drilled through the
heads of the following bolts for braided seal wire: two center head bolts,
middle two small pan bolts, and a hole must be drilled through the threaded end
of both bolts that fastens the carburetor to the intake manifold. Please paint
the heads of the drilled bolts a contrasting color.
B2l. Only NH swayback or Ford "F"
swayback carburetors allowed. Carburetor must be complete, including choke
butterfly. The Association's 0.710" gauge MUST NOT go through the carburetor
from either side. The club's W gauge shall not pass from the choke side of
the carburetor. Carburetor must conform to the diagram as printed. No material
can be added to the interior of the carburetor.
B2n. Only Model T type wire wheels, Model
T type wooden spoke whees, Model T type disk wheels, Model T type aluminum
spoke wheels, Model A 21" wire wheels, or 30 by 3 1/2" wire wheels are
allowed.
B2o. Only stock Model T or Ruckstell
rear-ends and axles with:
-
standard eleven tooth pinion
- forty
tooth ring gear
- stock
roller bearings
-
Ruckstell rear-ends must be locked in high.
B2p. Cast iron or aluminum pistons of
stock Model T type required. Cast iron pistons must have a full set of .250"
width rings in place. Aluminum pistons must have two (2) .125" width compression
rings and one (1) 0.1875" width oil ring in place. Pistons must conform to
the attached diagrams.
Refer to
Illustration for Piston Dimensions
B2q. There must be one stock piston, rod
and cap assembly in the engine. Exceptions: Cap may be drilled for dipper, and
grooved for oil. The other three (3) assemblies can be balanced to this one.
Piston is not to exceed a height of .400" above the head gasket.
B2r. Rods must be Model T Ford script.
Maximum center to center distance of 7.030" measured from center of rod journal
to center of wrist-pin.
B2s. Any cast iron original Ford script
head is allowed, but the combustion chamber is limited to 270cc minimum. The
head will be measured without the head gasket, without spark plugs, and the
spark plugs holes will be plugged with clay to be flush. One stock combustion
chamber is required, the other chambers to mimic the stock chamber. No material
can be added to the combustion chamber to equalize.
B2t. The crankshaft must be Model T Ford
Script with a stock stroke of four (4) inches + / - .030. Chroming,
hardening or grinding of journals allowed, not to exceed 1.250" maximum or
1.208" minimum diameter.
B2u. For all valves use a minimum stem
diameter of 5/16", a maximum head diameter of 1.500" and seating face of 45
degrees. Use either pins or two-piece keepers. Radiused, 45 degree or three
angle seat grinds allowable.
B2v. Any cam that doesn't require
modification of the block may be used. Bearing bores must be standard size, no
relieving of the bearing bores.
B2w. Adjustable flat tappet lifters (push
rods) of stock dimensions, stem oversize to 1/32" allowed.
B2x. Only stock Model T Ford and Model A
Ford valve springs are allowed.
C. NON-OPTIONAL ITEMS
C1. * Emergency brakes must be in good
working order.
C2. * All transmission bands must be in
good working order.
C3. * Complete set of floorboards
required.
C4. Rebuilt or new radiators allowed.
Must be built to stock dimensions including tanks and side brackets.
C5. No modifications of the inside oiling
system allowed.
C6. Non-Model T style and size tops not
allowed.
C7. Throat of carburetor may be smoothed
as long as the Association's .710" gauge does not pass. No altering of the basic
design of the carburetor allowed. Carburetor must be complete including all
butterflies, adjusting needle, and stock spray needle. Choke and throttle rods
must pass a visual inspection for stock uniform shaft dimensions with no obvious
modifications. Butterflies must be original size.
C8. Bolts on wishbone at rear of pan must
be safety wired. Front wishbone accessory braces on pre-1920 cars allowed. Use
standard wishbone sizes.
C9. Use stock configuration spring sets
with a minimum of seven leaves per spring set.
C10. External auxiliary accessory type
brakes are not allowed.
C11. Belly bands are allowed and if the
motor mount breaks the car takes the standard penalty. The belly bands cannot be
used for support at any time.
C12. Accessory pan arms are not allowed
except for as an emergency repair while under time.
C13. Steering dampeners are not allowed.
C14. Ignition battery must be 6 volt
type.
C15. Accessory battery charging devices
must be disconnected.
C16. Battery disconnect switches and
fuses are allowed in the primary circuit, excluding the ignition system.
C17. Original type ignition switch
required.
C18. Cylinder bore not to exceed 3.825"
maximum or 3.750" minimum
C19. Counter-balanced crankshaft not
allowed.
D. ITEMS WITH OPTIONS
D1. Optional equipment must serve the
original purpose and no other purpose.
D2. Optional equipment includes:
-Balancing of rotating parts
-Band
material type
-Body color
-Bronze
or roller thrust washers and neoprene seals on Model T or Ruckstell rear ends
and axles
-Camshaft bearings and seal
-Camshaft gear may be drilled
-Camshaft timing gear material type
-Coil box material type
-Engine splash pans
-Fan use and type
-Fourth main type
-Gas strainers allowed
-Gauges
-Grooving and drilling of the rod bearings and main bearings
-Hardened valve seats
-Hood use
-Hot air stove, original type
-Internal timer material type
-Knurling of piston
-Maximum of one outside oil line allowed
-Muffler use and type
-Multi-piece piston rings
-Neoprene seals use
-Rod
bolts and nuts choice
-Shock absorber use and type
-Spare tires and type of carriers
-Stainless steel and swirl polished valves
-Timer ball or needle bearing rollers
-Tops of open cars use
-Transmission oil screen allowed
-Turn signals
-Use and type of high speed clutches, such as Watts and Turbo 400
-Use of offset key between crankshaft timing keyway and the crankshaft timing
gear keyway
-"V" type belt and pulleys
-Water
pump design and use
-Windshield wiper of any type
-Zerk
fittings in place of oil and grease cups
E. TIMING AND TEARDOWN RULES
E1. Timing will begin as designated for
each car whether or not the car is on the starting line. Starting times can be
adjusted at the timer's discretion. If the timers recognize a beneficial savings
in time, a lagging car may be sent out ahead of its designated time. Usually
this will be discussed with the Directors ahead of time. Time will start for
this car when it leaves the starting line.
E2. * Each car will come to a complete
stop before starting at the timer's direction.
E3. Removal of head or pan while at stop
(not under time) or on tour day, if tour day occurs during the endurance run,
will impose a time penalty of 1 hour. Report this infraction to the inspectors
immediately. Removal of head or pan under time must be reported to the
inspectors at the first opportunity for replacement of seal.
E4. Changing the carburetor imposes a
time penalty of 15 minutes. Report the infraction to an inspector immediately.
Replacement carburetor must meet the requirements stated in the Inspection
Rules.
E5. Disabled cars will receive slow time
for each leg not completed. In addition, cars trailered in on the last day are
not eligible for prize money or trophies.
E6. Replacement of complete engine is
cause for disqualification.
E7. The top 3 cars will be torn down
immediately following the last flag. Additional teardowns will be put to a vote
of the Endurance drivers. Endurance drivers will vote to accept or reject items
of question.
E8. The first, second and third place
cars will be torn down by a panel of five inspectors. The driver in the top
position at tear down cannot be an inspector, but the next five place drivers
are required to be inspectors for tear down. If a car is disqualified, the next
place lower will be inspected, until three have been found qualified, as per
rule #76. All inspectors must vote. Any driver has the right to consult with an
inspector on any issues concerning the cars. The five teardown inspectors have
final say in what is brought to the vote of the drivers.
E9. The teardown team must ask the
drivers present if there are any other items that should be reviewed, before the
completion of the teardown. Items brought up will be voted on by the drivers
present. If a majority of drivers vote yes, the teardown team will take a look
at the item brought up.
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