Drive-by

we should do this at one show

A. Vehicle/Owner Requirements
1. Only the owner/member or support team member may sit in the vehicle during the pass and must sit in, and operate the system from, the driver’s seat.
2. Vehicle must be operated in a safe and cautious manner. Pass will be disqualified if competitor does a burnout of any kind or displays any unsafe behavior
before, during, or after the test, including racing forward.
3. Once the pass has started, the vehicle may not be put in reverse; however, it may stop in front of testing station before proceeding. Vehicles with manual
transmissions must be operated to keep “rolling back” to a minimum.
4. Engine revving shall be kept to the minimum amount necessary to move the vehicle safely through the lane. Any excessive revving will result in the pass
being disqualified.
B. Judging Criteria
1. Windows may be open. Windows may not be removed from the vehicle. Doors, trunk/hatch, and hood must be closed. T-tops may be removed; sunroofs/
moonroofs may be open or removed (if designed to be removed without tools), convertible tops may be down. Soft top vehicles will be considered convertibles.
2. Competitor must play musical track(s), (i.e. songs) in which the bass notes vary and are not sustained for the entire pass. No tones, sweeps, and/or bass only
tracks. The TermLab “spectrum analyzer” will be displayed and used to determine that bass notes are not sustained.
3. Competitors may not use a burnt CD and may only use commercially available music tracks.
4. Competitors who opt to use a CD Changer or Multi CD head unit must remove all other CD’s to ensure that the Judges are able to verify the CD being
used for their “Drive-by SPL Parade” test.
5. The 30 second test will begin as soon as the Judge hears music coming from the competitor’s vehicle.
6. Mids and highs must be able to be heard outside the vehicle.
7. Lyrics in song may not include any foul or offensive language.
8. No bracing teams allowed
9. Peak frequency must not exceed 100hz, as verified by TermLab metering system.
C. Sensor Placement
1. In addition to the General Rules, sensor will be placed 72” (6’) from the outside edge of a marker on the ground (usually a cone), on passenger side of the
vehicle; 54” (4.5’) off the ground on MECA approved stand.
2. The starting point for the test will be 60” (5’) from the marker on the ground (usually a cone) which is used for Rule C.1.
3. Competitors will pull up so that the leading edge of the front windshield is at the 1st cone or 5’ mark.
4. Competitors who hit the marker will have their pass disqualifi ed. In the event of a minor hit (i.e. running over the base of a cone) the competitor may be
granted a retry at the Judge’s discretion.
D. System Requirements
1. No modifications to the front of the vehicle with the intent to increase sound pressure level score, except for the modifi cations outlined in D.2. through D.9.
2. Enclosure cannot extend past any part of the front door jambs, except in a standard cab truck where it must fit with the driver’s seat in the most forward
position.
3. Door panels may be modifi ed, rebuilt, removed, or built out (3/4” maximum).
4. Headliner may be removed or replaced, but may be no thicker than 3/4”.
5. Dash modifi cations are limited to mounting of; automotive gauges (i.e., tach or voltage gauge), for video system components (i.e., screen(s), DVD player,
game console), relocation of source unit, and/or mounting front stage speakers for SQL applications.
6. Dash may only be recovered with a cloth type material. Painting to match a color scheme of the vehicle will also be allowed.
7. Only rubberized/asphalt type sound deadening material is allowed to be used on the fl oor in front the B-pillars, 2 layers maximum in any area.
8. Vehicle must have automotive seats in the forward only position. Both front seats must be properly mounted in the vehicle. Seats may be replaced, providing
they are still a DOT approved automotive seat; no homemade, marine, or other types allowed.
9. Center consoles may be removed or rebuilt as long as the design does not intentionally redirect pressure, which may increase SPL score.
10. Upgraded charging systems allowed. Unlimited batteries and/or capacitance allowed.
11. Batteries must be securely mounted, and must be located either under the hood and/or be mounted anywhere behind the B-pillars, within the original skin
of the vehicle, or be mounted under the vehicle in a battery box. Battery box may be a separate unit mounted under the vehicle or be installed through a hole
cut in the floor. Battery box must provide protection from the outside and may not hinder the vehicle’s ability to be driven safely.