2/22/17 Revision to Motor Rules for 2017 Season
- Engine Option 1
- Any 6 or 8 cylinder engine.
- Holley 2 barrel model 4412 carburetor only. Choke horn may be removed. Must pass all MMS carburetor gauges and meet Tech officials’ approval. Venturi area may not be altered. Only one carburetor per car. Adapter plate maximum height 1” inside of adapter plate may not be polished or altered.
- Engine Option 2
- GM part # 88958604;. Crate Motors must have original seals or must have S.E.A.L authorized rebuilder seals. MMS Pro Late Model legal car may compete at 3000 lbs Unsealed crate motor may only use Holly 2 barrel 4412 carburetorEngines must remain same as stock except for updates and rebuilds.
CRATE MOTOR CARBURETOR:
Must run Holley carburetor model # 4150, part # 805411 650 CFM 4-barrel. This carburetor must pass all track gauges and tech tools. You may change jets, air bleed jets, and power valves. No other modifications of any kind will be considered legal.
CRATE MOTOR CARBURETOR SPACER:
All GM crate engines may run 1 inch aluminum spacer under carburetor. Open or 4 hole type allowed or VDL tapered spacer only. 1 paper gasket per side not to exceed .065 in thickness
- GM part # 88958604;. Crate Motors must have original seals or must have S.E.A.L authorized rebuilder seals. MMS Pro Late Model legal car may compete at 3000 lbs Unsealed crate motor may only use Holly 2 barrel 4412 carburetorEngines must remain same as stock except for updates and rebuilds.
