Tazewell Speedway Sportsman Division Rules
Same as Lucas Oil Series
A: Fastrack and Nesmith specs are legal (EXCEPT CARBURETOR)
stock as they came from GM. Must remain as listed in GM technical manual p.n.
38958668. Fastrack and Nesmith specs are legal. Rebuilt motors are allowed. Do
not have to be sealed
Weight: 604- 2300 lbs
602- 2300 lbs
B: 362 max CI
Weight for Engine B is 24000 lbs
GM Cast Steel Block. No after market blocks.
One or two piece rear seal, no
block lighting, no splayed main caps
All Components must remain in stock location
No raised or oversized cam journals
No over sized lifters. (.842)
Stock stroke 3.480
Steel Rods - 5.700
I-Beam Style - 3/8" bolt, press fit pins or floated rods
No titanium or aluminum
Piston Flat Top 2 or 4 valve pocket style
No dry sump
No vacuum pumps
No external pumps
Steel stock stroke (3.480)
Min. weight 48lbs.
with key & front timing gear
Stock - OEM Journals main (2.448) and rod
Cam - Lifter:
Max Valve Lift .460" (checked with solid lifter at .00lash)
No mushroom lifter
No ceramic lifter
No roller lifter
Cam bearing journals must be OEM (1.868)
Timing chain only, no gear drive,
no belt drive
Steel only must be GM head
market heads allowed
Straight plug only
Heads must be 23 deg.
milling allowed, not to exceed 1 deg.
All heads must remain as cast
valves only no titanium or other materials
Under cut stems allowed - no hollow
Max valve size 2.02/1.60 minimum valve weight 2.02 109 grams 1.60 94
Must remain 11/32 stem diam.
CC limit on intake runner 175max
Limit on combustion chamber
No porting, polishing, grinding
excessive deburring in
any breathing area
No shot preening, no media blasting
Heads may be deburred on outside areas only
Valve spring pockets may be machined
Max spring pressure 105 lbs seat-260 lbs open
Multi-Angle valve job permitted
machine cut only
Max .900 below seat measurement to start at bottom of second
angle or 45 degrees
No hand blending allowed
All angles must remain concentric
with valve guide
May be machine for push rod clearance
No shaft style
rockers, stud style only
No raised runners
must be cast aluminum
Porting or polishing not allowed
Two piece manifolds
ENGINE A OR B
One 4-barrel 4150
style, gas or E-85.
No traction control
No crank triggers
Electronic boxes buy rule $300
No "Tri-y" style allowed. All headers must
be standard 4 into 1 style. No stainless headers.
Headers buy rule $300
All pumps and pulleys must be mounted in the standard location on the engine.
No bell housing mounted pulleys. No electric fans.
No adjustable suspension
devices mounted in the driver's compartment. Brake adjusters are permitted.
Shocks: Oil or gas, must be non-adjustable, no external reservoirs permitted,
shocks may be steel or aluminum. Any shock may be claimed for $175 coil over kit
One spring, one shock per corner.
Steel drive shafts only,
must be painted white
Standard steel axles only, no titanium axles. Axles
may be solid or gun drilled.
Hubs must be standard style aluminum or steel.
No light weight hubs. No magnesium or liquid filled hubs permitted.
rotors must be steel. No lightened or cut rotors. Brake rotors can be solid or
drilled. Rotors must be 1.25 inch thick, unless using stock style GM brakes. No
. 810 rotors.
All suspension components must be made of steel or aluminum,
no titanium parts
Standard slip yoke transmission only. No ball-spline transmissions.
must be aluminum or steel, no magnesium transmissions. Reverse
starter mount bell housings permitted, steel or aluminum only
Both rear tires must punch 56 before qualifying and feature race.
If you punch less than 56 before qualifying, you will only have
1 lap to qualify.
No front tire rule
Tire may be checked for chemical
soaking. Protest fee is $150.
Random samples may be taken and sent to a lab
for testing. If samples are collected, winnings will be held until test results
come back from lab.
If lab results prove tires to be illegal, you will be
disqualified. There will be a $300 fine before you race again at Tazewell Speedway.
being a new class, we will make weight adjustments if needed to equal the competition
1lb per lap with 10lb total tolerance allowed.
1.Tires must have all numbers and name on the tire. No grinding
off numbers or names. Anytime this is altered, will be illegal.
set back will be 6 inches from center of top ball joint to the most forward spark
3. Track reserves the right to delete, change or amend rules in the interest
4. Any gasoline will be allowed. No alcohol. E 85 gasoline
will be allowed. The specific gravity may not exceed .750 Protest fee will be
5. Weight must be posted on right side A pillar
If weight is not posted,
you will only have 1 qualify lap
Failure to post correct weight will result
No driver will be eligible to compete in the sportsman class
if they have won a limited or super late model event in the past 3 years at any
track. A driver is allowed to race in more than 1 class on the same night with
different cars but must purchase an armband for each class.
limit on tear down must be done in a timely manner. Track official will monitor
this. If the official declares that this has not been done in a timely manner,
the track official reserves the right to declare disqualification
track reserves the right to amend, delete or change rules in the interest of competition.
Model Sportsman 2016 Purse
$75 to start