2012 SMCA Rules Addendums:
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).
We will allow you to use three different OEM replacement heads. These are the ONLY aftermarket heads that will be allowed.
These heads must remain unaltered. Porting to the stock gasket only! To Tech approval.
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
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
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.
300+ Ignition w/rev limiter, p/n 49300