Tazewell Speedway Sportsman Division Rules
Same as Lucas Oil Series
604 or 602 GM Crate
Must remain 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- 2400 lbs
602- 2300 lbs
362 max CI
Weight for Engine B is 2300 lbs
GM Cast Steel Block. No after market blocks
All Components must remain in stock location
No raised or oversized cam journals
No over sized lifters. (.842)
Max bore 4.065
Stock stroke 3.480
Steel Rods - 5.700 Length only
I-Beam Style - 3/8" bolt
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
Hyd Only Max Valve Lift .460"
0.842 lifter diameter only
No mushroom lifter
No ceramic lifter
No roller lifter
Cam bearing journals must be OEM
Steel only must be GM head
No after market heads allowed
Straight plug only
Heads must be 23 deg.
Angle milling allowed, not to exceed 1 deg.
All heads must remain as cast
Steel valves only no titanium or other materials
Under cut stems allowed
Max valve size 2.02/1.60
Must remain 11/32 stem diam.
CC limit on intake runner 175max 60cc min.
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
Multi-Angle valve job permitted machine cut only
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
Intake must be cast aluminum
Porting or polishing not allowed
Two piece manifolds not allowed
One 4 barrel 650 holley
Carburetor buy rule $500
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
No bell housing mounted pulleys. No electric fans.
No adjustable suspension devices mounted in the driver's compartment.
Brake adjusters are permitted.
Shocks must be non-adjustable, no external reservoirs permitted, shocks
may be steel or aluminum. Any shock may be claimed for $175 coil over
kit not included.
Steel drive shafts only, must be painted white
Standard steel axles only, no titanium axles. Axles may be solid or
Hubs must be standard style aluminum or steel. No light weight hubs.
No magnesium or liquid filled hubs permitted.
Brake 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
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 58 before qualifying and feature race. No
If you punch less than 58 before qualifying, you will only have 1 lap
No front tire rule
Tire may be checked for chemical soaking
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
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 competiton between engines.
1.Tires must have all numbers and name on the tire. No grinding off
numbers or names. Anytime this is altered, will be illegal.
2. Engine set back will be 6 inches from center of top ball joint to
the most forward spark plug
3. Track reserves the right to delete, change or amend rules in the
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 $25
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 in disqualification
Taz Late Models drivers & Sportsman drivers are not allowed to run
in both the Taz Late Model & Sportsman races. Must run in only 1
of these. Any Late Model driver Limited or Super that has won in the
past 3 years are not eligible to run in Sportsman Class.