2019 Limited LM

by Jan 19, 2019

2019 Limited LM

by Jan 19, 2019

 

Body Rule:
Lucas Oil Series Body Rules

Engine A:
365 CID max- Minimum Weight 2275lbs

Block:
OEM Cast Steel Block or Aftermarket cast Steel Block – Max Bore 4.070(.003 tolerance)

Crank:
Steel Crank Only- Balancing ok 3.500 Max Stroke

Pistons:
Flat top only

Rods:
Steel Rods Only. No Titanium or Aluminum

Oiling:
Wet or Dry No Vacuum Pumps

Intake Manifold:
Must be cast aluminum

Heads:
Steel Only Heads Must be 23 Degree style (2 degree tolerance) No raised runners
Angle Milling allowed
Angle plugs are allowed, in stock location
Steel valves only
11/32 stem valves, undercut allowed
Max. valve 2.02 int. 1.600 exh.
Max CC on int runner is 205 cc
No minimum or combustion chamber volume
No porting, or polishing is allowed, no shot peening allowed
Valve spring pockets may be machined
Racing style valve job is permitted with no hand blending
Stud mounted rockers with stud girdle or jesel rockers are allowed

CAM:
Flat tappet style

Lifters:
Flat tappet style only
.842 max diam.
No mushroom lifters, or radius, or ceramic, or roller are allowed

 

Engine B:
365 CID max- Minimum Weight 2350lbs

Block:
OEM cast steel block, or aftermarket cast steel block – Max bore 4.070(.003 tolerance)

Crank:
Steel Crank only Balancing OK 3.500 Max stroke

Pistons:
Any

Rods:
Steel rods only, no titanium or aluminum

Oiling:
Wet or dry sump – No vacuum pumps

Intake Manifold:
Must be cast aluminum

Heads:
Steel only Heads must be 23 degree style (2 degree tolerance) No raised runners
Angle milling allowed
Angle Plugs are allowed, in stock location
11/32 stem valves, undercut allowed
Steel or titanium valves allowed
Max. valve size 2.0555 int. 1.600 Exh
Porting or polishing is allowed
Valve spring pockets may be machined
Racing style valve job is permitted
Stud mounted rockers with stud girdle or jesel rockers are allowed

CAM:
Roller or flat tappet is allowed

Lifters:
Roller lifters are allowed
.842 max diam.

 

Engine C:
365 CID max  Minimum Weight 2400lbs  – Raised Runners 2450lbs
All steel
23 degree style heads(2 degree tolerance)

 

Engine D:

CT525 GM Performance Crate – Minimum Weight 2300lbs.
Must have original GM Chevrolet Performance seals

 

Sportsman Drivers:

Sportsman cars will be allowed to compete in the LLM event under Sportsman rule motor specifications.

 
 

General:  Includes all Engine combinations

 

Carburetor:

One four barrel – 4150 style, no dominators

Gas or E85

 

Ignition:
Any – No traction control

 

Tire Rule:
Fronts – Any LM Tire

Rears –  Both LM Rear Tires must durometer minimum 55 before qualifying and feature

Wheels – 14” wide maximum

No treating or soaking of tires in order to alter the compound of the tire is permitted.

Mufflers- Required in ALL Classes per Blount County Ordinance

 

FUEL BURN OFF
1lb per lap with 10lb total tolerance allowed

103” wheelbase minimum – 1” tolerance

Engine set back will be 6 inches from center of top ball joint to the most forward spark plug(1/2” tolerance)
Weight and engine must be posted on right side A pillar (Example, B-2350#) *Failure to post correct weight will result in immediate disqualification
No traction control device of any kind allowed
Electronic ignition boxes buy rule – $300
Visual protest fee is $100 – Track retains $50
Rod protest fee is $100.00 Track retains $50.00
Engine Protest fee for Engine A B C is $400.00 Track retains $100.00
Engine protest fee for engine D is $100.00 Check seal bolts only
Working race-ceivers are mandatory at all times

Time limit on tear down must be done in timely manner. Track officials will monitor this.
If the official declares that has not been done in a timely manner, the official reserves the right to dis-allow protest. Visual protest cannot be made after the feature event.

The track reserves the right to confiscate any component to prove it’s legality.

The track reserves the right to amend, delete or change rules in the interest of competition.