2012 NLMS MOPAR ENGINE RULES
BLOCKS
1.360 Mopar
production cast iron blocks permitted, also permitted is the Mopar performance cast iron A engine block or R3 block
part #P4876792AB (59 degree valve tappet) or P4876672AB (48 degree valve
tappet) is a good starting point World Producst, or Dart Blocks allowed must remain the same
configuration of stock Mopar blocks.
2.Block may ONLY have a Maximum cylinder bore of 4.030.
3.Wet sump oil system ONLY. No dry sumps.
CRANKSHAFT
1.Any Forged steel or cast cranks ONLY. No Billets. Mopar performance
crankshafts part #P5007253A is a good start.
Must have stock stroke 3.58, 50lb minimum weight. Minimum rod pin diameter 2.100. NO knife edging, or
winging of crankshaft. Balancing
permitted.
CONNECTING RODS
1.Any forged steel sportsman rod, 6 maximum
length, 7/16 rod bolts permitted. Connecting rods not to exceed $750 cost.
I Beam Rods Allowed:
1.
Crower Sportsman 6
2.
Eagle 6
3.
K-1 6
4.
Manley Sportmaster 6
5.
Pro-Comp 6
6.
Scat 6
H Beam Rods Allowed:
1. Eagle 6
2.
Callies-Compstar 6
3.
K-1 6
4.
Manley 6
5.
Pro-Comp 6
2.NO Billet rods, or Carilla
rods.
3.May polish beams, No profiling of cnc
machining in center of beams.
4.Manufacturers name and Rod size must remain on rod.
PISTONS
1.Any flat top piston permitted.
HARMONIC BALANCER
1.Any harmonic balancer permitted
CYLINDER HEADS
1.Mopar W2 cast iron cylinder head permitted part number
P5249769 (59 degree block) 180cc max intake runner volume, & 78cc max
exhaust runner volume. P5007445 (48
degree block) 190cc max intake runner volume, 78cc max exhaust runner volume,
or P5007445AB 196cc max intake runner volume, 78cc max exhaust runner volume,
and casting numbers must remain on head
unaltered. 64cc mimimum combustion
chamber volume. NO
TOLLERANCE. May use Brodix
NLMS SPEC aluminum heads.
2.2.02 maximum intake valve diameter,
and 1.60 maximum exhaust valve diameter. No Titanium valves, Steel or
Stainless Steel valves ONLY. 11/32
minimum valve stem diameter. Multi angle
valve job permitted. Hollow Stem Valves Permitted any cylinder head.
3.No porting, polishing, gasket
matching, or epoxying of runners. No
short side radiousing. No bowl work more than .500 below 45 degree
valve seat cut. Must be able to see and
feel the defined raised lip of original bowl in the cylinder head, in all areas
of the bowl, AND All bowl work
must
Remain concentric
with the valve guide, and Any completely smooth blends, of the bowl on the
short side (even though you can see where the cutter stops) will be considered
short siding, again must be able to see and feel the defined raised lip
of the original bowl. Milling of
heads of accepted, (note combustion chamber limit above)
4.May use any diameter valve
spring. Any Valve retainer, 11/32 minimum valve stem
diameter. Any
Steel push rod. Steel Valve keepers ONLY.
Mopar may run shaft mounted rocker system.
INTAKE MANIFOLD
1.Any cast iron or aluminum intake.
2.No porting, polishing, squaring/gasket matching
of ports. When using NLMS SPEC aluminum heads, you may gasket match intake port
opening no more than ½ (.500) deep into runner. NO MATCHING ON HEAD
SIDE.
3.May run 1 spacer
4.Turtle OK not altered
5.Total adapter not to exceed 1 total. Any thing mounted between carburetor and intake
is considered spacer, and can not exceed 1 total.
6.Directional spacers OK.
7.All intakes must be from a recognized name brand
intake manufacturer, ex Edelbrock, Brodix, Holley, Weiand, etc. MUST have manufacturers name and part number intact and unaltered.
NO import manifolds allowed
CAMSHAFT
1.Any flat tappet cam
2.Stock diameter lifters ONLY .904, OEM size to
make of engine, NO ceramic foot lifters allowed, all lifters must have a
magnetic base.
3.NO roller cams or lifters
4.Cast iron stick ONLY, NO billet cams.
TIMING GEARS
1.Timing chain and gears ONLY
2.NO gear drives, or belt drives
CARBURETOR
1.One dual line, single pump 3310 Holly, with
Vacuum sec. or Holley 80803 HP Series Double Pumper.
2.May remove choke butterfly.
3.May drill idle holes in primary
butterflies. There should be No half, or
flat throttle shafts in the primary side of the carburetors base plate.
1.The primary
throttle shaft, with a 172 butterfly should be a minimum of .1868 thick
2.The secondary
round shaft, with a 172 butterfly should be a minimum of .1828 thick.
3.The
secondary half or flat shaft with a 172
butterfly, should be a minimum of .1228 thick
4.Billett base
plate allowed must meet factory Holly specs. On throttle
bores, and above throttle shaft specs.
Note: Checked with
go-no-go gauges
4.May install secondary jet metering plate, Billet
metering plate allowed.
5.3310 Holley May
NOT remove choke horn.
6.NO porting or polishing.
7.Ford 735 c.f.m. OK,
Secondary Throttle screw OK.
8.Four corner idle OK.
9.Carbs checked with Go-No-Go gauges.
10.stock 3/8 inside
diameter boosters 3310 & 80803 Holley.
Down leg Boosters OK, must remain stock Holly specs.
FUEL PUMP AND FUEL
CELL
1.Stock mount fuel pumps ONLY.
2.No electric or belt driven fuel pumps
3.Steel case on fuel cell recommended
WATER PUMP
1.Stock mount ONLY.
2.Electric fans OK.
IGNITION
1.Any battery operated.
2.No crank trigger ignition, & No Magnetos
3.NO Electronic Traction Control device!! MSD in Association with the NLMS are working
together to eliminate electronic traction control.
MSD is currently
developing a new ignition box that block traction
control and has the capability to be checked via computer via computer to make
There is no
traction control, and that the ignition box is working according to MSD
specifications, and has not been tampered with.
The new
Box will become Mandatory
when available, and will become part of Post Race Tech This is new technology and WILL
be implemented when
Readily
available to all NLMS teams.
4. MSD Boxes
may not be mounted in drivers cockpit. The trigger wiring Harness (ie. green and purple wires) must go straight from box thru
firewall and follow along engine side of firewall, and be easily accessible for
inspection. The NLMS reserves the right
to inspect MSD boxes at any time, and the right to hold winnings and impound
MSD boxes to be sent to MSD for inspection. MSD (Autotronic
Controls Corp.) has agreed to work with the NLMS to prevent the use of
Electronic Traction Control (ETC). If at
any time an ETC is found it will be confiscated by the NLMS and SEVERE
penalties will levied against the infracting team found to be using ETC.
RADIATOR
1.Must be close to stock location,
mounted in front the motor.
STARTER
1.Must have operating starter.
