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2006 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 These 2 blocks are the only performance
blocks permitted All casting numbers
must be unaltered and visible. 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. 2.NO Billet rods, or
Carilla rods. 3.May polish beams, No
profiling of cnc machining in center of beams. 4.Manufacturer’s 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. 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. 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. 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. 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 carburetor’s
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 gauges4.May install
secondary jet metering plate, Billet metering plate allowed. 5.May NOT remove
choke horn. 6.NO porting or
polishing. 7.Ford 735 c.f.m.
OK, Secondary Throttle screw OK. 8.Single pump
ONLY. No rear nozzles. 9.Four corner idle
OK. 10.Carbs checked
with Go-No-Go gauges. 11.stock inside
diameter boosters 3310 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.
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