Rules

CLASS S.4
CLASS S.3
CLASS S.2
CLASS S.1

AWD Subie Challenge

2019 Competition Rules

Revision 2

Release Date: December 11, 2018

About AWD Subie Challenge Series

The AWD Subie Challenge (“Subie Challenge”) is a grassroots annual time trial series for all owners of Subaru Vehicles conforming to the AWD platform and maintain engines produced by Subaru Corporation, formerly Fuji Heavy Industries. The AWD Subie Challenge competition focuses on driver development with the goal of providing an accessible and affordable community for challengers to compete against themselves as well as others.

General

  • All safety rules denoted by HPDE host company and instructions from its chief steward must be followed by all Subaru Challenge participants.
  • Violations of safety rules, complaints made on your car or yourself, un-sportsman like conduct on track or in the pits, arguing with safety officials, etc. will result in forfeit of points for that day and may prevent you from earning points for 1 or more competitions.
  • Severe on-track safety infractions such as contact with other cars, car over turns, severe impacts, blatant over-driving, blatant disregard for flags on track, anything that could be construed as an embarrassment to the series or the hosting company, or anything that is judged to be severe misconduct or negligence will remove you from the series for 9 months with forfeiture of all points for the current season.
  • Qualified instructors are available for those who wish to learn to push their car further.

Tech

  • It is the driver’s responsibility to make sure their car is in good running order so that it is not a hazard to themselves, or anyone else at the track. Tech inspection rules of the hosting organization must be followed.
  • Tech inspection is generally performed by the driver/owner of the vehicle at HPDE events, but some groups do require a more formal 3rd party inspection.
  • There is generally a self tech form at registration, please check everything on the form.
  • For questions on how to inspect a certain aspect of a vehicle, please seek an available staff member.
  • If a vehicle becomes a nuisance, repeatedly has mechanical failures, spills fluid, or is poorly maintained, you will not be allowed to compete in AWD Subie challenge until your car is prepared to be on track.

Safety

  • Although safety upgrades are not required for HPDE events, it is strongly encouraged in all classes.
  • The OEM safety systems in most modern cars are not designed to be partially replaced.
  • Use of fixed back bucket seats, harness bars, and 4-point safety devices with ASM are safe for front impact, but not in roll over situations. Please consider safety as a complete system.
  • Roll bars, cages, harnesses, seats, etc., should be installed by a professional.
  • For more safety information,

 

Class Rules

All vehicles shall be scrutinized by staff members for classing upon its first event of the year. Vehicles are subject to scrutinization throughout the year without notice. Based on review by staff, rules are subject to change at any time. For any questions about classes and future modifications, please contact appropriate members of staff.

OEM = Original Equipment Manufactured by Subaru (including SPT and STi); features can be swapped

Stock = OEM as the car was purchased off the lot

Upgraded = OEM equipment with parts that give characteristics outside OEM specifications

 

CLASS S.4: Intended for lower powered naturally aspirated, stock turbo vehicles with mild modifications.

Chassis:

Allowed

  • Interior may be modified (OEM dash and center console must remain intact and minimally modified) with the use of an approved 6-point roll cage; otherwise all interior components must be retained
  • OEM Wings; STi swap allowed
  • OEM Lips, splitters, diffusers
  • OEM under-tray and under-panels
  • Aftermarket lips allowed
  • OEM door and door panels may be modified/removed only with the use of approved door bars on 6-point roll cage

Not Allowed

  • Modifications to factory unibody/frame/chassis
  • Removal of factory glass
  • Removal of functioning OEM headlights, taillights, and turn signals
  • GT Wings
  • Aftermarket chassis mounted splitter or diffuser
  • Aftermarket under-tray and under-panels that extend past the leading edge0

Engine:

Allowed

  • Engine replacements; must use OEM Subaru engine block halves–built short blocks with stock specifications only (No changes to displacement)
  • OEM Turbos for EJ motors ONLY
  • Upgraded Turbo up to TD04-19T for EJ motors only
  • Aftermarket Exhausts; must retain one catalytic converter
  • EFI Calibrations; OEM ecu must be retained
  • Aftermarket turbos for stock naturally aspirated cars; size limited to VF39 or equivalent

Not Allowed

  • Modified Heads; heads must retain OEM specifications
  • Aftermarket Turbos for WRX’s
  • Nitrous
  • E85/Leaded fuel
  • Methanol/Alcohol Injection
  • No anti-lag

Drive-train:

Allowed

  • Final drive modifications
  • Differential modifications
  • Clutch/flywheel modifications
  • OEM transmission swaps in factory locations, modifications restricted for fitment only
  • Aftermarket drive-train electronics (Ex: Spider/DCCD Pro DCCD controller)

Not Allowed

  • Driveline configuration changes (Ex: FWD to RWD/AWD)
  • Aftermarket transmissions
  • Aftermarket gear sets

Suspension:

Allowed

  • Limit 1-way damper
  • Aftermarket bushings
  • Aftermarket bracing

Not Allowed

  • Modifications to pick up points
  • Aftermarket sub-frames

Tires

  • 201+ Tread Wear (No RE71R or RIVAL S), 255 Width Max
  • If stock naturally aspirated, then 100+ Tread Wear RE71R or RIVAL S allowed, 245 Width Max

 

CLASS S.3: Intended for mid-level, naturally aspirated or stock turbo vehicles (including STi). *Aftermarket GT Wing and Front Lips are allowed in this class, but cannot be used in conjunction with each other.

Chassis:

*Only one major change to aftermarket parts allowed to the front or rear of the vehicle.  ie)  Drivers may utilize a front splitter with a rear diffuser, but not a front splitter and canards.  In the same sense, drivers may use aftermarket diffusers with a front splitter, but not an aftermarket diffuser AND GT Wing.

Allowed

  • Interior may be modified (OEM dash and center console must remain intact and minimally modified) with the use of an approved 6-point roll cage, otherwise, only removal of interior from the B-pillar back allowed
  • OEM Wings; STi swap allowed
  • Lips
  • Front Splitter:  may only extend from rear most part of the front bumper and must not extend past 3″ of the leading edge of the front bumper.
  • Rear Diffuser:  may only extend from the front most part of the rear bumper and must not extend past 3″ of the leading edge of the rear bumper.
  • under-tray and under-panels
  • GT Wings
  • OEM door and door panels may be modified/removed only with the use of approved door bars on 6-point roll cage

Not Allowed

  • Modifications to factory unibody/frame/chassis
  • Removal of factory glass
  • Removal of functioning OEM headlights, taillights, and turn signals
  • Flat bottom components
  • Chassis mounted splitter
  • Aftermarket under-tray and under-panels that extend past bumper and/or cross member
  • Lightweight doors, trunks/hatches, or roofs.

Engine:

Allowed

  • Engine replacements; must use OEM Subaru engine block halves– built short blocks with stock specifications only (No changes to displacement)
  • Aftermarket Turbos; maximum turbo flow rate of 38 lb/min (size up to 16g or equivalent)
  • Aftermarket Exhausts; must retain one catalytic converter and stock fitment
  • EFI Calibrations; OEM ecu must be retained

Not Allowed

  • Modified heads; heads must retain OEM specifications
  • Nitrous
  • E85/Leaded fuel
  • Methanol/Alcohol
  • No anti-lag

Drive-train

Allowed

  • Final drive modifications
  • Differential modifications
  • Clutch/flywheel modifications
  • OEM transmission swaps in factory locations, modifications restricted for fitment only
  • Aftermarket drive-train electronics (Ex: Spider/DCCD Pro DCCD controller)

Not Allowed

  • Driveline configuration changes (Ex: FWD to RWD/AWD)
  • Aftermarket transmissions
  • Aftermarket gear sets

Suspension

Allowed

  • Limit 1-way damper
  • Aftermarket bushings
  • Aftermarket bracing

Not Allowed

  • Modifications to pick up points
  • Aftermarket sub-frames

Tires

  • 200+ Tread Wear (No RE71R or RIVAL S), 265 Width Max
  • If stock naturally aspirated, then 100+ Tread Wear (RE71R or RIVAL S allowed), 255 Width Max

 

CLASS S.2: Intended for more race oriented vehicles, allowing for aero modifications, high grip tires, and further engine modifications.

Chassis:

Allowed

  • Aftermarket body panels; chassis/frame must be OEM from front shock tower back
  • Gutted interior; must have securely fastened dash or finishing panel (minimum 2 planes)
  • Lexan rear windshield/windows allowed; must be securely fastened
  • Aftermarket Front Splitter; can only extend from front axles and must not extend more than 5″ past leading bottom edge of front bumper
  • Aftermarket Rear Diffuser; must not extend past 5″ from the leading bottom edge of rear bumper
  • Aftermarket lips allowed
  • Lightweight doors with the use of approved door bars on 6-point roll cage

Not Allowed

  • Removal of OEM or equivalent glass windshield
  • Removal of rear windshield/door windows
  • Removal of functioning taillights
  • Flat bottom components

Engine:

Allowed

  • Engine replacements; must use OEM Subaru engine block halves–built short blocks allowed
  • Modified heads
  • Aftermarket Turbos; maximum turbo flow rate of 48 lb/min (size up to 20g or equivalent)
  • Aftermarket Exhausts; must retain stock fitment
  • E85/Leaded fuel
  • Methanol/Alcohol injection

Not Allowed

  • Nitrous

Drive-train:

Allowed

  • Final drive modifications
  • Differential modifications
  • Clutch/flywheel modifications
  • Aftermarket gear sets; transmission case must be OEM

Not Allowed

  • Driveline configuration changes (Ex: FWD to RWD/AWD)
  • Aftermarket transmissions

Suspension:

Allowed

  • Limit 3-way damper
  • Aftermarket bushings
  • Aftermarket bracing
  • Aftermarket sub-frames

Not Allowed

  • Modifications to pick up points
  • Aftermarket sub-frames

Tires

100+ Tread Wear, 275 width max

 

Class S.1: Intended for more race oriented vehicles, allowing for more chassis modifications

Chassis:

Allowed

  • Aftermarket body panels; chassis/frame must be OEM from front shock tower back
  • Gutted interior; must have securely fastened dash or finishing panel (minimum 2 planes)
  • Lexan rear windshield/windows allowed; must be securely fastened
  • Aftermarket Front Splitter; no limit
  • Aftermarket Rear Diffuser; no limit
  • Aftermarket lips allowed
  • Lightweight doors with the use of approved door bars on 6-point roll cage

Not Allowed

  • Removal of OEM or equivalent glass windshield
  • Removal of rear windshield/door windows
  • Removal of functioning taillights

Engine:

  • No restrictions to power output
  • E85/Leaded fuels allowed

Drive-train:

  • Final drive modifications allowed
  • Differential modifications allowed
  • Clutch/flywheel modifications allowed
  • Aftermarket Transmissions allowed

Suspension:

No modifications to pick up points

Tires:

U.S. DOT approved tires only

 

*Exhibition: Intended for any vehicle built beyond the current class rules, and/or a vehicle driven by a professional driver. Professional drivers will be determined by appropriate members of staff. Committee reserves the right to class exhibition/outlier vehicles at their discretion, based on times and further research on vehicle modifications.

 

Points System

The number of points will follow a Fibonacci scale (1, 2, 3, 5, 8, 13). The driver with the best lap time in each class of each competition day will be awarded the maximum number of points. Every subsequent place in that class will receive the next lowest point value. To receive a minimum of one point, you must drive one complete timed lap at the event.  The points are counted for the first four sessions of each round; and up to the discretion of the committee.  The points may be re-scaled based on the number of participants on the given round and determined by committee members.

In the event of a tie for the day, next best time will determine the position. In the event of a tie for the championship, the most number of podiums will determine the position. If the most number of podiums are tied, the highest accumulations of total podium points will determine the position.

To be included in the championship, a driver must participate in a minimum of three rounds, regardless of the number of points earned.

Times must be through official timing from the host event using a transponder. All sessions except bonus session will count. Points are awarded to the driver in the class they competed in that day. If they compete in a different class the next event, the points are NOT transferable to the new class.

 

Committee

John Capati

Jex Delos Santos

Malko Izurieta

Associates

Parin Thalangdee

Frank Escalle

Media

Luis Mario Hinojos

Steven Iraheta

Parin Thalangdee

Technical Adviser

Jex Delos Santos

John Lindeman

Technical Adviser/Head Instructor

Steven Doherty