Late Model Supplemental crate motor information

Attention Late Model Division:

Supplemental information to be a part of the 2012 CNS rule book regarding the use of the crate 604 motor:

• Carburetor: 650 CFM gauge legal maximum. 1“spacer between carburetor will be allowed.
• Ignition systems will be limited to 6600 rpm. All other requirements for ignition systems currently in the rule book will be enforced.
• Approved aftermarket harmonic balancers and pulleys will be allowed.
• 1.5 Or 1.6 aluminum roller rocker arms are allowed.
• Factory installed valve springs as well as GM 12499224 Beehive valve springs are allowed.
• Factory installed oil pans as well as the 6.5” aftermarket oil pans allowed.
• Minimum weight rule with driver before the race will be 2850 lbs. with 58% maximum left side weight.

CNS Management