2016 NWR Solo Supplemental Rules


Regional Series events will use the current SCCA National Solo Rules and the PCS, GTCS, and GCR as they apply.


All competitors (except Formula Junior) must possess a current valid driver’s license and must be at least 16 years old on the day of the event. (Exception: A driver with a valid WA learner permit may drive with a parent/guardian.) Drivers under age 18 must have written parental permission to compete, AND a parent or guardian must sign the appropriate minor waiver.


Double entries may be allowed at the discretion of the Event Chair. The second entry at an event will be entered as “Time Only” (TO) or “Indexed Time Only 2” (ITO2), is not eligible for event trophies or series points, and must run during the second half of the day. Double entrants must work two work assignments, once in the morning and once in the afternoon. Chief of Workers assigns double entrants to an afternoon run group as necessary to balance out worker needs.


If allowed by the National Solo Rules, a passenger is permitted on any run during the event provided:

1) The driver is an event entrant and the car has passed Tech Inspection;

2) If the driver is inexperienced, the passenger is a Novice Instructor approved by the Novice Chair or the Event Chair;

3) The passenger is at least 12 years old (NOTE: A minor passenger may only ride with a parent or legal guardian);

4) All necessary waivers have been completed for the passenger;

5) The required safety equipment (see National Solo Rules, Section 4.3) is in place for the passenger and fits properly; and

6) The car has an adequate passenger seat.


During course setup, the course designer, designated course setup person, the Chief of Course, and/or the attending Solo Safety Steward are permitted to pre-run any section of the course without being considered a conflict of interest. Other drivers may be chosen to pre-drive the course. If they are a competitor, Time Only entrants (in lieu of drivers competing for points) are preferred. The course should be pre-driven in sections at approximate competition speeds, exiting each section before continuing, rather than driving the entire course. Course sections run at approximate competition speeds must be done in a car that has passed annual tech, and all persons in the car must be wearing appropriate safety gear. A Solo Safety Steward (SSS) must be present for pre-running. Abuse of this allowance, such as driving in a manner to attempt to gain competitive advantage, will be grounds for protest.


The off-course speed limit is 15 MPH. This applies to all pit areas and to any on-site entry/exit roads. VIOLATORS MAY BE SUBJECT TO IMMEDIATE DISQUALIFICATION AND REQUIRED TO LEAVE THE EVENT SITE.


Absolutely no alcoholic beverages or drugs are permitted at the event site during the event. Any additional site requirements must be obeyed as well. Drivers are not allowed to compete under the influence of such substances. VIOLATORS WILL BE SUBJECT TO IMMEDIATE DISQUALIFICATION AND REQUIRED TO LEAVE THE EVENT SITE.


The grid and course areas are OFF LIMITS to children and pets during competition. All pets MUST be leashed or otherwise restrained. Bicycles, skateboards, scooters and all other non-disabled-persons personal transportation devices are specifically prohibited from use in the active grid area. The use of such transportation devices in permitted areas of an event site shall be conducted in a safe and courteous manner. An adult or child whose activity is deemed unsafe, or in a manner not congruent with this allowance, may be prohibited from such activity at the discretion of the event’s designated Safety Steward.


The timing vehicle is ABSOLUTELY OFF LIMITS to all persons except event administrators.


Fuel, air, and helmets may not be readily available at the event site. Competitors are advised to be prepared accordingly.


Cars prepared to the WWSCC Improved category rules (only) may compete legally in their appropriate SCCA Solo Street Prepared class at Regional events. Similarly, cars prepared to the WWSCC Prepared category rules may compete in their appropriate Solo Prepared class, and cars prepared to the WWSCC Open Street class rules may compete in their appropriate Solo Street Modified class at Regional events.


Entrants must complete a work assignment as part of their participation in the event. Failure to complete a work assignment may result in revoking event awards and/or Regional Series points, and may also result in restriction from future events at the discretion of the Assistant RE/Solo.


Competitors will be assigned a work group during the same half of the day as their run group. Day-halves generally swap times at alternating events. Thus, a class that runs and works during the morning at one Regional event will usually run and work during the afternoon at the next Regional event. NWR SCCA reserves the right to revise class/day-half assignments to adapt to participation patterns, event administration, and scheduling as necessary.


Competitors needing to run outside of their assigned group run time MUST request to do so in writing, to the Event Chair, prior to the close of registration. Adequate justification (e.g., work conflict) is required. Out-of-group run requests shall be posted at the scoreboard. If a weather change influences class results in favor of an out-of-group competitor, an ad hoc committee composed of the Event Chair, Chief of Tech, and Chief of Timing will determine an appropriate time penalty, such as assigning a time 0.001 sec. slower than the slowest time in the class. No more than three out-of-group requests will be honored for an individual during a single season.


Out-of-group work requests must be submitted in writing to the Chief of Workers prior to the first affected work time.


Street tires are defined in section 13.3 of the National Solo Rules, which specifies a minimum UTQG treadwear grade of 200.


Cars will be classed according to the current National Solo Rules. To provide better competition for lightly subscribed classes, certain classes are grouped together based on class similarity and National Solo Rules Appendix J (Bumping Order) to form the following Regional classes (each having an Open and a Ladies class):

Street 1 (S1/S1L): SS, AS, BS, FS

Street 2 (S2/S2L): CS, ES, EV

Street 3 (S3/S3L): DS, GS, HS

Non-Stock 1 (NS1/NS1L): SSP, ASP, BSP, ESP, SSR

Non-Stock 2 (NS2/NS2L): CSP, DSP, FSP

Non-Stock 3 (NS3/NS3L): All Prepared, Modified, and Kart classes, and FSAE

Non-Stock 4 (NS4/NS4L): STC, STS, STF, STR

Non-Stock 5 (NS5/NS5L): STX, STU, STP

Non-Stock 6 (NS6/NS6L): SM, SSM, SMF


Finishing position within each of these Regional classes will be determined using the current 2016 National PAX/RTP Index method (Rule 26), as adjusted. Cars entered in these Regional consolidated classes will display their appropriate National Solo Rules class designation (AS, CSPL, etc.), not the Regional class designation.

The following classes (Open and Ladies) will run as standalone classes, not in one of the Regional combined classes: Open PAX and Non-Stock PAX (Rule 18), Non-Stock Street Tire (Rule 19), and Novice (Rule 20).


Four PAX Index-based classes will be offered: Open PAX, Open PAX Ladies, Non-Stock PAX, and Non-Stock PAX Ladies. All cars are eligible to compete in Open PAX and Open PAX Ladies. Non-Stock PAX and Non-Stock PAX Ladies are limited to cars in the Non-Stock classes (including CAM). Class designation is an “X” following the normal class letters (e.g., ASX, CSPLX). The PAX/RTP Index values (Rule 26) will be used to compute times for scoring.


Two indexed classes will be provided for Non-Stock cars competing on street tires (Rule 16): one Open and one Ladies. Class designation is a “T” following the normal class letters (e.g., ASPT, CSPLT). Purpose-built autocross or road racing (R-compound) tires are not allowed. See National Solo Rules section 13.3 for tire eligibility. The current National PAX/RTP Index values will be used to compute times for scoring (See Rule 26 for formula). Street Touring classes are not eligible.


Two Novice classes will be provided: one Open and one Ladies. Class designation will be NOV (or NOVL). The classes are intended to be transitional classes for new Solo drivers. A Novice is an individual competitor who has competed in not more than eight (8) SCCA Regional events. A competitor who has competed more than eight (8) times must move to a regular class. Tires for Novice classes must comply with the street tire restrictions (Rule 16).

Novice classes will be available in the AM session and the PM session (NOV AM and NOV PM) but a competitor may enter only one Novice class per event. For example, if a competitor runs NOV AM, he/she may not run NOV PM at the same event (but may run either session at another event). NOV AM and NOV PM will be computed separately at each event, but not for year-end results. Event trophies will be awarded per Rule 23 (Awards), as well as year-end class trophies. A Novice Driver of the Year will be selected from new competitors.

The Novice classes are not intended for drivers who cannot run in their regular run group but have failed to meet the provisions of Rule 14; those drivers may run Time Only (TO).


One Intermediate Street Tire class will be provided. Class designation will be IST. Men and women eligible for this class will have no more than 2 years of Solo competition experience. Participation will be at the discretion of the Assistant RE/Solo. All cars meeting the following requirements will be eligible to compete: Vehicles must be licensed and street legal, compete on street tires as defined in Rule 16, and pass the safety and tech inspection. Times will not be indexed. The year-end champion will not be eligible for this class in subsequent years.


A class open to all electric plug-in and hybrid electric cars.  All cars must run street tires with 200 treadwear or greater and must follow guidelines of street class.  They will not be given a PAX index. The class designation will be EV. ALL Teslas will be disallowed from participating in this class.


Two Indexed Time Only class will be available in each half of the day. These classes are intended for instructional and testing purposes and to accommodate entrants who do not desire to compete for series points. Entrants must complete a regular work assignment. Entrants running the event for the first time will be classified as ITO1. Entrants running the event for the second time will be classified as ITO2.  No awards accrue to Indexed Time Only entries. Event results will include a class listing for ITO1 and ITO2. Indexed Time Only cars will display no class markings other than “ITO1” or “ITO2”.


A Time Only class will be available in each half of the day. The class is intended for instructional and testing purposes and to accommodate entrants who do not desire to compete for series points. Entrants must complete a regular work assignment. No awards accrue to Time Only entries. Event results will include a class listing for Time Only, but may suppress the class from the Top Time and Top Index Time listings. Time Only cars will display no class markings other than “TO”. This class shall be used for all entrants running for the second time (see Rule 3, Double Entries) who are not entered in class ITO2.


Trophies will be awarded at all events according to participation levels as follows: One trophy for every three competitors in a class, rounded to the next whole number. For example, for seven competitors, three trophies will be awarded. To be eligible for a year-end award in a class, a competitor must have competed in the required number of events in the class. The required number of events is determined by the following formula: (no. of events)/2 + 2, rounded to the next whole number. Thus, the best 6 events are counted for an 8-event series, 7 for a 9-event series, and 7 for a 10-event series. In addition to year-end class awards, a Worker of the Year and Novice Driver of the Year will be selected.


The fastest of the timed trophy runs, plus any penalty seconds applied, will be used to determine a competitor's place in class. Unofficial results will reflect the raw time plus all cones (2 seconds per cone) and gates (10 seconds per gate).

ALL timed runs at any given event will be considered “competition runs” for all classes. All competition runs are scored for the event and year-end season awards.

A Competitor’s score should be posted as soon as practicable after the run and should be posted prior to the start of the competitor’s next timed run. The posting of class standings should be regularly updated during the Run Group. Final class standings must remain posted for a minimum of 30 minutes to satisfy time limits for filing any timing and/or competitor Protests.

The “performance index” system will be used in awarding season points to competitors, as follows:

Points = (Fastest time in class / Competitor’s best time) x 100


The following excerpt from the National Solo Rules shows examples of situations for which a penalty is or is not assessed:



Results will not be mailed to each competitor. They will be available from the Region Web site (www.nwr-scca.org).


The PAX/RTP performance index developed by Rick Ruth will be used for any classes requiring an index to be applied. The PAX/RTP Index is located here: http://solotime.info/pax/rtp2016.html. The indexed time is calculated as follows:

Time = [(scratch time) x (PAX index)] + penalties

The indexed time for NS cars (except ST cars) competing on street tires is calculated as follows:

Time = [(scratch time) x (PAX index) x .980] + penalties


Competitors are expected to drive on course in a fashion which does not threaten the integrity of the timing system components (e.g., not spin through the finish gate or get lost and drive over the timing cables). To enforce this requirement, a financial penalty (fine) will be assessed for the following incidents:

  • Impact with the timing light head.

  • Impact with the timing reflector head.

  • Driving over the timing cables in a fashion which causes any:

  • Strain on connections to timing clock or timing light head,

  • Breaks in the timing cable, or

  • Substantial penetrating abrasion to the timing cable casing.

The fine for all such listed incidents is $100.00. Payment of the fine is due immediately at the time of the incident. Competitors subject to a fine can request terms for payment from the Assistant RE/Solo on a case-by-case basis, but it is expected that all fines will be cleared prior to competition in future events. Failure to pay a fine will result in suspension of the privilege to participate in future events until the fine is paid.


No more than two drivers may drive the same car in any single Run Group, except in the event of a mechanical DNF after the Run Group has begun. If the mechanical failure happens during a race weekend, then the exception will carry over to the next day of competition. The Run Groups will be structured so that the corresponding Open and Ladies classes will not compete in the same Run Group (e.g., S1 and S1 Ladies will not run in the same group).


A minimum of five (5) minutes must have elapsed between runs for any car during Regional Championship Series events. This includes reruns or runs for another driver of the same car. A grid marshal will be specifically assigned to handle two-driver cars and will keep a time log to assure compliance with the five-minute minimum between runs. The time shall be measured from the time the car leaves the finish area of the course until the time it leaves the start line.

All drivers must have completed their first runs, including reruns, before any drivers take their second runs, etc. A rerun should be taken as promptly as possible following the mandatory five-minute wait specified above.


If a car deviates from the course so that all four wheels are off the paved surface, that driver will be disqualified (DSQ) from further driving participation in the event. However, all previous run times will remain and be used for final scoring, and the driver must complete his or her work assignment.

The final decision to apply a DSQ from the event may be overridden with complete agreement by both the Event Chair and Safety Steward. However, the driver’s run in which he or she had all four wheels off the paved surface will always be scored as a DSQ.


A course map for each event must be presented for review, revision, and approval at a Solo Committee meeting or meeting of the assigned Solo Safety Steward(s), prior to course setup. Adequate time shall be allowed for onsite review, revision, and approval by the Solo Safety Steward(s) prior to the start of the event. When possible, the course shall be set up the day prior to the event, and review and approval conducted at that time. The Event Chair is responsible to assure the course review and approval process is implemented. The Event Chair must be alert to incidents and changing weather conditions, and work with the course designer and SSS to make course changes if necessary.


When an incident occurs that involves personal injury, or property damage to the site or participant cars/equipment, the Event Chair and Solo Safety Steward(s) shall consult to determine if/what actions need to be taken regarding the driver/participant, the course design, or event operating procedures before the event continues.



36.1.1 A section of the course shall be selected as the measurement site. The section shall be located where all vehicles will be driven at full throttle as much as possible (e.g., a straightaway). An area 100 feet wide (from course centerline) on each side of this section of the course must be free of reflective surfaces larger than a lamp post.

36.1.2 The sound meter shall be located 50 feet from the edge of the course, centered in the section, and perpendicular to the direction of travel of the vehicle. The meter shall be positioned 3 to 4 feet above the ground. All readings shall be taken on the "A" scale, under SLOW response.

36.1.3 All cars passing through the measurement site shall be monitored. All cars shall be recorded on the noise monitoring log sheet. The recorded information shall include car, class, and number. As the vehicle passes, the highest reading shall be noted.

36.1.4 Course communication should report noise readings above 93.0 dBA.


Notification to drivers of vehicles with readings of 93.0 to 96.0 dBA shall be made as soon as possible, preferably on the day of the occurrence.


36.3.1 A run shall be defined as any time the vehicle enters the track, regardless of specific driver.

36.3.2 Any run that results in a reading in excess of 96.0 dBA shall be disqualified. There shall be no exceptions.

36.3.3 Any run which exceeds 100.0 dBA shall result in immediate disqualification of the vehicle from any subsequent run, which may include any additional drivers. This disqualification shall extend until the vehicle can be expected to be under the 96.0 dBA limit, to the satisfaction of the Noise Committee Chair or his designee. A critical view shall be taken of all modifications, i.e., modifications should reasonably expect sound levels in the 93 dBA range. An exception for valid mechanical problems may be considered.

36.3.4 Upon completion of any run resulting in a reading in excess of 96.0 dBA, and prior to any subsequent runs, the driver shall be notified of the offense.

36.3.5 On the first violation, the driver shall be required to immediately make an attempt to bring the vehicle within compliance. Physical changes to the vehicle that result in a drop in the noise output of the vehicle are the only accepted means of compliance.

36.3.6 On the second violation at a single day’s event, the driver shall be given one final chance to bring the vehicle within compliance.

36.3.7 On the third violation at a single day’s event, the vehicle shall be disqualified from any subsequent competition, which shall include any additional drivers. This disqualification shall extend until the driver or owner can prove to the satisfaction of the Noise Committee Chair or his designee that the vehicle conforms to the 96.0 dBA limit.


36.4.1 Any attempt to simply divert sound by directing the exhaust away from the meter without reducing the noise level shall be considered unsportsmanlike conduct and subject to immediate disqualification. Permanently affixed tips which divert to the side are not subject to this rule. Diverting sound up or down is not subject to this rule. The intent is to prevent movable tips with the intent of defeating sound measurement.

36.4.2 Any attempt to reduce sound by lifting the throttle when passing the sound meter shall be considered unsportsmanlike conduct and subject to immediate disqualification. This shall be verified by having a driver pass the sound meter at a distance of 100 feet at full throttle.


The Noise Committee Chair, with the approval of the Event Chair, may change the dBA limit for the current event at any time.  The intent is to handle changing weather conditions where the wind may be blowing consistently toward or away from the sound meter, resulting in db measurements that do not serve the purpose of the sound rule.

36.6.2 No car shall exceed a sound level of 96.0 dBA.