4.5" NASCAR Rules
CHASSIS:
1.
Any 4.5" chassis that is a maximun of 3.25” wide & is commercially
through a distributor & available at the raceway.
Must be approved prior to October 30, 2019.
2.
If
using extenders must use original manufacturer’s extenders on the chassis, they
were designed for.
3.
May
solder extender to chassis.
4.
May
remove front wings for extender / front wheel clearance only.
5.
May
be laser, EDM, Water Jet, milled, die cut. stamped and formed metal only.
6.
May
brace chassis in any way you would like.
7.
A
steel guide tongue reinforcement may be used, but the original guide tongue may
not be removed, modified, or moved.
8.
Must use rear &
front axle bushings on chassis that allow front bushings to be installed. Ball bearings
are NOT allowed.
9.
Total weight must be
a minimum of 100 grams.
GEARS:
1.
Must
run a 9:37 gear ratio.
2.
Angled
pinions are allowed.
3.
May
solder pinion on motor.
4.
Must
use 64 pitch gears.
AXLES/TIRES:
1.
Minimum axle diameter front 3/32", rear 3/32". Drill blank axles
allowed.
2.
Tires front and rear must be composed of black foam rubber only.
No dyed tires allowed.
3.
May add nail polish to fronts.
4.
Rear minimum tire diameter .810". Front
minimum tire diameter .790” with a minimum front tire width of .400”.
Maximum rear tire width .810''.
5.
Independent rotating fronts allowed.
6.
MUST RUN
with the Front tires and axle on the car for the
ENTIRE RACE.
7.
Solid, one-piece front axles only, no stubbies.
8.
Front axles may be soldered solid, but front wheels must rotate.
9.
Steel axles only. No hollow or other lightweight axles.
10.
Must use front
& rear axle bushings. Offset bushings
are allowed. Ball bearings
are NOT allowed.
11.
Maximum width is 83mm.
12.
.050” clearance at the back, up to the rear axle.
13.
Must have .015" clearance in front of chassis, measured where chassis
widens behind front axle, sitting on tires on tech block with the Guide not
touching. Gauge must slide under
without lifting tires from tech block.
LEAD WIRES:
1.
Magnet wire or magnet type wire is not allowed.
2.
Guide clips are allowed.
3.
May add wire guide or retainer.
BODIES:
1.
Body
must be commercially available and on approved body list.
2.
1/8"
minimum front & rear bumper and must see the front splitter on the front of the
car. On the Outisight 4.5 NASCAR
Body,
the rear must have a 1 1/8” rear fender height that is measured
from the top of the spoiler downward.
Can’t put holes or any cuts/slits into rear.
3.
Maximum rear
spoiler height of 1 5/8", measured from the tech block to the top of the
spoiler. The tech tool must go all the way across without any part of the
spoiler going over the tech tool.
4.
Must
have three scale appearing numbers.
5.
Body
must be fully painted and cover the entire chassis.
6.
May
reinforce body with tape or Lexan.
7.
All
windows must be clear and retain factory Lexan.
8.
Front
wheel wells must be cut out. No cutting into the top of the fenders.
Chassis or track must not be visible.
9.
Must use a
fully molded 3 D driver figure interior.
Must have a two-color presentably, realistically painted.
No paper interior. Must be
stock car type interior. Must
completely cover the chassis.
10.
Bodies
may not be moved forward or backward on the chassis.
11.
Tires
must be located in the proper positions. Wheel wells must be cutouts. Full wheel
and tire must be visible when viewed from the side.
12.
May
NOT cut out the rear of the body.
MOTOR:
1.
Must
use Proslot Sealed Balanced 16D motor.
(Part #PS2002)
2.
Motors must not have been
opened or tampered with in any way.
3.
Motors must
be factory sealed and using the unmodified factory seal only. Seals may have
clear "fingernail polish" added to extend life of seal.
NO other modifications to the seals
allowed.
4.
Any
motor brush may be used.
5.
Any
motor spring may be used.
6.
Can
NOT make any alterations to the end
bell and can.
7.
Can
motor bushing may be soldered.