Rules Addendum

 

2012 SMCA Rules Addendums:

Modifieds:

Overall Weight:
If utilizing an IMCA engine, the overall weight of the racecar must be a minimum of two-thousand four-hundred fifty (2,450) pounds.(all IMCA engine rules apply)
If utilizing an “OPEN” or any non IMCA engine, the overall weight of the racecar must be a minimum of two-thousand five-hundred (2500) pounds.
If utilizing aluminum heads, the overall weight of the racecar must be a minimum of two-thousand five-hundred fifty (2,550) pounds and the racecar must have a minimum fifty (50) pounds of weight in front of the mid-plate.
If utilizing a Quick change rear end, you must add an additional 50 pounds to the car. (If running an aluminum headed open motor with a quick change, you must weigh (2600) pounds.) (If running an IMCA Motor and a quick change you must weigh (2500) pounds).

Super Stocks:

Engines:
We will allow you to use three different OEM replacement heads. These are the ONLY aftermarket heads that will be allowed.
RHS-12403
RHS-12407
Dart-10024366
These heads must remain unaltered. Porting to the stock gasket only! To Tech approval.

Mini-Stocks:

Tires:
The 8” tire rule defined:
The tires TREAD width must measure 8 inches or less with a ruler across the tires tread.

 

2012 SMS Approved Ignition Boxes and Rev-Limiters

MSD Ignition – Box must be mounted with chip facing up or out for easy access.
6T, p/n 6400 – must use plug-in MSD p/n 8738 Soft Touch Rev-Limiter
6AL, p/n 6420
Digital 6AL, p/n 6425 – Dials must be facing up or out for easy access
6ALN, p/n 6430
6HVC. p/n 6601
6HVC, p/n 6631 (Deutsch Plug)
6HVC, p/n 6632 (Deutsch Plug)
Soft Touch Rev-Limiter, p/n 8728 – use with GM, Ford, Mopar points, amplifier, or magnetic pickup distributors/ignitions. 8728-6 w/pigtail is also legal.
Soft Touch Rev-Limiter, p/n 8738 – use with 6 series ignition boxes w/pigtail
MSD E-Curve Distributor is not legal.

HEI Distributors: must use MSD p/n 8728 Soft Touch Rev-limiter or DUI P/N 380777.
Note: Circuit board modules with built-in rev-limiters are not acceptable. You can continue to use the module but you will have to use one of the two rev-limiters. Turn up circuit board limiter to maximum.

DUI – Rev Limiter Part# 380777 may be used with HEI distributor. Chip must face up.

MSD Chip Values:
6,200 RPM Module = 4,787.7 Ohms ± 1%. Max reading is 4, 835.6 Ohms
7,400 RPM Module = 6,149.3 Ohms ± 1% Max reading is 6,210.8 Ohms
7,800 RPM Module = 6,646.4 Ohms ± 1%. Max reading is 6,712.9 Ohms
8,000 RPM Module = 6,904.0 Ohms ± 1%. Max reading is 6,973.0 Ohms
8,400 RPM Module = 7,438.3 Ohms ± 1%. Max reading is 7,512.7 Ohms

CRANE Ignition
HI-6N Oval track Ignition, p/n 6000-6410 (Weatherpak Plug)
HI-6N Oval track Ignition, p/n 6000-6412 (Deutsch Plug)
HI-6RN Oval track Ignition, p/n 6000-6750. Digital
Hi – 6RL Oval Track Ignition, p/n 6000 – 6474: sealed, preset 7400 RPM Limit
HI-6RL Modified Ignition, p/n 6000-6478: sealed, preset 7800 RPM Limit
HI-6RL Late Model Ignition, p/n 6000-6480: sealed, preset 8000 RPM Limit
HI-6RL Late Model Ignition, p/n 6000-6484, sealed, preset 8400 RPM Limit

MALLORY Ignition
HYFIRE 6AL Digital CD Ignition, p/n 6853M
HYFIRE Off Road w/rev limiter, p/n 6867M
IGN, CT Pro w/rev limiter, p/n 6864M
Max-Fire Electronic Programmable Distributor is not legal.

ACCEL Ignition
300+ Ignition w/rev limiter, p/n 49300