CLICK HERE TO DOWNLOAD THE COMPLETE 2009 DIRTcar RULEBOOK
(Southern UMP Modified, East Coast UMP Modified, Western UMP Modified, Limited UMP Modified)
*Under the guideline of the 2009 DIRTcar UMP Modified rules any and/or rules and as stated in the 2009 DIRTcar Rule Book, all DIRTcar rules applies to all divisions, except in instances where any local track rules, pertaining to any item are listed in the local track rules, whether that is in the technical components and/or the racing procedures and/or overall rules that are administered by the local track officials and management. In those instances and where applicable, the local track rules shall prevail.
* The 2009 DIRTcar UMP Modified Rules have been established to include the rules in several different regions of North America, refer to the rules that are in effect in your region.
* The following are the 2009 UMP Modified rules. All amendments supersede any previous rules regarding any technical article and/or aspect.
* Under the guideline of the 2009 UMP Modified rules any and/or rules and as stated in the 2009 DIRTcar Rule Book, all DIRTcar rules apply to all sanctioned divisions.
* The specifications published shall be considered a section of the “Official Rules and Specifications” for all events, series and sanctions by World Racing Group. All sections should be considered when determining specifications and governance.
Midwest Limited UMP Modified
15.0 Rule Addendums
15.1.C. Only Steel Cylinder Heads and Steel Blocks will be permitted.
15.1.I. Only a single 500 CFM Holley 2 Barrel carburetor will be permitted.
15.1.M Only Flat Tappet Cams will be permitted.
15.2.E Bert and/or Brinn type Transmissions will not be permitted.
15.7.N In 2010 the DIRTcar approved “B” or “C” shocks will be the only shock absorbers permitted. For the 2009 season the shock absorber claim will be $120.00 per shock absorber.
15.4.D The minimum weight of car with driver at all times including after the race is 2,400 lbs.
15.4.F The 602 GM Crate Motor will be permitted with a minimum weight with driver at all times will be 2300 lbs.
15.8.B The DIRTcar UMP approved tire is the Hoosier A-40 compound in the DIRTcar plated tire 26.5/8.0/15 or 27.5/8.0/15. The maximum width of the tire will be 9” inches.
Pro UMP Modified
15.1.A Only the GM 602 Crate Motor will be permitted for competition.
15.4.D The minimum weight of car with driver at all times including after the race is 2,300 lbs.
Deep South UMP Modified
15.4.D The minimum weight of car with driver at all times including after the race is 2,600 lbs.
15.8.B The DIRTcar UMP approved tire is the Hoosier E-Mod “B” compound in the DIRTcar plated tire 26.0/8.0/15 or 26.5/8.0/15. The maximum width of the tire will be 9” inches.
Western UMP Modified (Barnett)
15.1.C Only Steel Cylinder Heads and Steel Blocks will be permitted.
15.1.H The exhaust system(s) must be mounted with the exhaust directed away from the vehicle and/or away from the ground (preferably horizontal and outside the body of the car). A maximum of 1/2” inch clearance surrounding the header pipe when directed through the firewall on the driver’s side. Local track rules will prevail when decibel and/or muffler rules.
The following mufflers are recommended for competition in All Western Region Events;
Extreme Technologies – P/N 21435; P/N 35835
North East UMP Modified (New York Series)