- Grandpa Dog 4 Cylinder Rules -
Updated March 27, 2018
Spencer Speedway’s Grandpa Dog 4 Cylinder division. It is designed
with the intent to allowing rookie drivers the
opportunity to enjoy the Short Track racing experience.
This class is open to anyone 14 years old or older.
Minors MUST have a signed parent release form.
Drivers competing in this division will not be eligible
to race in any other division at Spencer Speedway except
Anyone who is running in a premier class
(Modified, SST, Weekly Modified, Super Modified, Super
Stock, Street Stock etc..) is not eligible to run in
stock vehicles, prepared with safety guidelines, to help
teach driver control. Over competitive drivers and
vehicles will be subject to rule amendments to help
equalize the competition. This will be fun class with
the thrill of competition.
BODY AND CHASSIS:
maximum wheel base of
mid-size vehicles such as Camaro, Firebirds,
Thunderbirds, Vans, SUVs, or trucks, ETC...........
Unaltered, stock body, and frame dimensions must remain
3. Pre-register a number 0-999. Numbers must be on both
doors, and roof at least 3" thick and 18" tall.
Numbers must be in a contrasting color. Additional
numbers should be painted on right front and rear of
vehicle for easy recognition by officials. Body and
paint must be kept in a presentable condition. NO
inappropriate print or logos allowed!
all glass (except windshield, if desired may be replaced
with polycarbonate, lexan).
all burnable and sharp objects within the interior.
and steering column must remain in stock location for
make and model being used. A quick release steering
wheel hub may be used. Factory ignition lock pin must be
removed from column.
OEM brake pedal and components only . Must be in factory
must be inspectable and in working condition . All 4
brakes must work. No adjusting
doors must be welded shut.
chain on front and rear bumpers are mandatory.
components must remain stock. Mounting locations MUST
NOT be altered except designated amount of camber
adjustment on the right front only. This will be the
tech officials discretion.
Maximum Camber will be 11degrees. This means tilt of
roll cage surrounding the driver with a minimum of 3
driver side bars.
roll bar must have 2 braces running rearward from the
top of the roll cage at approximately 45 degree angle
welded to the frame or cross brace.
Adequate brace must run from door jam to door jam at
approximately 15 inches from the floor .
main cage roll bars must be a minimum of 1 3/4 O.D. ERW
or DOM, .090 minimum wall thickness. All roll bars must
be welded to the frame unless uni-body construction. If
a uni-body car is being used you MUST have a 6" square
foot plate welded and bolted to the floor, or a full
length rocker sub-frame support welded securely across
the top of the rocker panel, extending from front to
rear fo the door openings.
weld joints must have gusset minimum 1/8" thick steel.
cars must have steel plate minimum 5/16" thickness by
12" wide starting 12" before and continuing 18" behind
driver’s door and firmly secured to body. If a full roll
cage with interior bars on driver side, outside plate is
Adequate padding in the driver’s compartment required.
Equivalent or greater bracing may be used subject to the
approval of Spencer Speedway.
exterior rub rail may be used on each door. It must be
mounted tightly to the body.
ENGINE AND TRANSMISSION:
STOCK, STOCK!!! No performance or racing
accessories! If a component from the engine fails it
WILL be replaced by another USED component purchased
from a junkyard. No reconditioning of any core engine
components...heads, block, internals etc.........NO
2. Bolt on
accessories such as water pumps, alternators, and power
steering pumps, etc.. may be OEM replacement parts.
OEM carburetor/ fuel injection system will be unaltered
for make and model being used.
4412 unaltered may be used as a replacement carburetor
for the Autolite or Motorcraft Ford type carburetor.
Choke may be removed and you may use any jets.
performance enhancing or after market computer chips
will be allowed.
factory ignition and 13.5 volt batteries only. Needs to
be located in a safe and secure manner.
Any battery mounted
inside the drivers compartment needs to be securely
mounted in an enclosed approved box.
OEM exhaust manifold and intake manifold will be
Converter and mufflers may be removed and replaced with
a straight pipe (max. 2"). Exhaust is to be routed to
the outside of car behind the driver.
unaltered transmission / trans-Axel. Stock clutch
limited production performance parts allowed. If
questionable call Tech Inspector.
engines allowed with a 2% left side weight penalty.
minimum weight, after race with driver with no fluids
added, will be in relationship to cubic displacement,
number of cams, and number of valves. 1 lb. Per cubic
centimeter displacement with driver.. add 100 lbs. For
valves in excess of 2 per cylinder.. add 100 lbs fir dual
overhead cam (DOHC).
54% between left and right side weight, weighted with
driver. Car weight
must be posted on left side of hood.
3. Competitive weight
equalizer- after 2 consecutive feature wins OR if a car
is over competitive for it's class, determined by Track
Officials, Track Officials may do whatever they
feel is necessary to equalize the car.
Track Officials decisions are final.
TIRES AND WHEELS:
offset wheels side to side. No staggered tire side to
All 4 tires MUST BE THE SAME SIZE.
widening factory wheels. Maximum 5" measured inside bead.
Factory production vehicles with wider rim width will be
allowed only at the Tech Inspectors discretion.
radial tires only. Minimum tread wear 300. No
performance or recap tires (tech inspectors discretion).
AS PER TECH
DIRECTIONAL TIRES WILL NOT BE
width....60 series tires.
5. No tire
shaving or cutting.
Minimum tread depth of 2/32" must
Street Fuel, not more than 93 Octane SUNOCO Ultra, will
be mandatory. No mixing/blending of fuels allowed. No
Fuel will be checked and subject to disqualification at
the discretion of Speedway Officials.
fuel tanks secured in front of the rear Axel may remain
in stock location or be replaced with approved smaller
fuel tanks located behind rear Axel must be replaced
with approved fuel cell and safely secured within the
disconnect switch is required.
extinguisher must be mounted within reach of the driver
and track crew.
teams must have and maintain a one-way radio/ scanner
Communication with the Spencer Speedway tower. This has
helped with positioning and safety. Track radio-154.600.
helmet, fire suit, gloves, HANS OR HUTCHENS DEVICES WILL
BE REQUIRED. Window net are required. See general
rules for additional track safety rules.
WHILE THE ABOVE RULES OFFER A GOOD OUTLINE, NOT EVERYTHING
CAN BE COVERED BY A WRITTEN RULE. IF YOU WANT TO RUN
ANYTHING NOT COVERED ASK JOHN WHITE FIRST
BEFORE DOING SO. IF YOU DON’T AND ANYTHING IS FOUND IT WILL
AUTOMATICALLY BE RULED ILLEGAL. ANY ITEM FOUND ILLEGAL WILL
ANY QUESTIONS PLEASE CONTACT :
John White :