The following are the two ROAR rules that apply to openings and cooling holes on bodies (ROAR Rule Book, pg 28, 2005).
6.1.10 Openings in the body other than those appropriate to full-size vehicle openings such as grill, scoops, air vents, etc. , must be kept to a minimum. Specifically servos, receivers, batteries, and servo savers are not allowed to protrude through the original body shell.
6.1.13 Cooling holes: Bodies for on-road fuel-powered cars (other than touring vehicle bodies) may have up to 1/3 of the windshield cut out. Bodies used on off-road fuel-powered cars may have up to 1/2 the windshield cut out. For touring vehicle windshields, one cooling opening is permitted , limited to a maximum of 50mm in any direction.
According to the rules found in the ROAR Rule Book (listed above), there should not be any legal conflicts with the use of NACA ducts and hood scoops at ROAR sanctioned events. However, after speaking with ROAR's Technical Director, these are his exact words:
1. Side window duct: In the fuel and electric category, ALLOWED. We do not see any problems or deviations required. Tech inspection may allow this modificaton.
2. Roof duct: In the fuel category, ALLOWED* provided the body does not exceed the specifcally defined roofline/ windshield openings (in the roof/ windshield we allow one cooling hole and a refueling hole that have specified sizes and locations along with an access only opening for the carburetor and glow igniter). In the electric T2 category, NOT ALLOWED. There are no openings permitted in the roof/ windshield in this category.
3. Hood Scoop/ Duct (mounted on the hood)- In the fuel and electric category, NOT ALLOWED.
If you are racing in ROAR sanctioned events or events that follow ROAR rules you can still use our NACA submerged air ducts as prescribed above. For any other types of events, check with your event tech inspector. If the events you run in do not tech cars, use our products at will.
