*For questions about rules, contact IFO directly at email@example.com
PAYOUTS - $1600 - Must have 8 qualifiers for full payout. Less than 8 qualifiers will receive half the normal payout. Qualifiers must be capable of running 12.99 and faster.
Winner - $1200 ($2000 if 16 or more qualifiers)
R/U - $400 ($600 if 16 or more qualifiers)
Semi 1 - $100
Semi 2 - $100
*trophy payout only if 2 or fewer entries *Updated 3/1/16
Heads-up Pro-tree (.400) class for F/R/AWD 4/6 cylinder or rotary import brand/sport compact vehicles (no motorcycles, LS1 RX7s, etc allowed). Sport Compact vehicles include any FWD or AWD 4 cylinder (example: Cavalier, Neon, Cobalt, etc). *Domestic badged Import vehicles permitted, ex. Eagle Talon, Dodge Stealth, etc. Import 8/10/12 cyl entries limited to DOT approved tires. Any class with 2 or fewer entries is awarded a trophy only. Slicks and open exhaust allowed. *Updated 10/4/13.
Import or domestic compact car bodies allowed. *Updated 9/28/15
Doors must open and close from inside and outside the vehicle. No center drive configurations. No other interior restrictions.
CHASSIS AND SUSPENSION
Full tube chassis OK for naturally aspirated only. No center-drive systems. Wheelie bars are prohibited for boosted applications, but OK for n/a and n20 only applications.
4 or 6 cylinder, 2 or 3 rotor Import brand engines allowed. Domestic compact bodies limited to 4 cylinder. Outside manufacturer engine swaps allowed. 8/10/12 cyl Import engines allowed, but limited to DOT approved tires. *Updated 4/28/16
Turbochargers (limit 76.9 single/62.9 twins 6 cyl or rotary auto - 80.9 single 4 cyl - 88.9mm single/62.9 twins 6 cyl or rotary H pattern manual - 82.9mm single cast 6 cyl auto). Superchargers, and Nitrous Oxide Systems permitted in any combination. Turbo measured at inducer. *Updated 3/15/18
DRIVETRAIN AND TRANSMISSION
FWD, AWD, or RWD allowed. Any type of transmission allowed. *Updated 12/14/14
Any type of exhaust system permitted.
Any DOT approved tires allowed. Slicks limited to 26.0 for F/AWD and 28.0 for RWD or any naturally aspirated application. 8/10/12 cyl limited to DOT approved tires. *Updated 1/17/14.
*OIL CONTAINMENT RULING STARTING IN 2017
Highly modified, non-factory setup vehicles (determined at IFO staff's discretion) 11.49 and faster required to have oil containment device (pan or diaper). Racers lacking oil containment device when required may still race at IFO staff's discretion with $100 track clean up deposit. Deposit returned to racer at end of event pending no oil down. Catch pan should cover entire area below engine/transmission with 2 inch high lips on all sides. Lips should to be covered or curved inward. If a competitor spills excessive oil onto the track, he or she may be disqualified from racing at the discretion of IFO/track staff.
***If someone in your class is not within the rules, immediately ask for IFO staff to protest. Once your vehicle is staged, you accept all conditions of the race.
***Contestants may be disqualified from an event or banned from the series at the discretion of IFO staff for any one of the following reasons including, but not limited to 1) breaking rules 2) excessive oil downs 3) playing excessively loud music with explicit lyrics 4) bad sportsmanship 5) illegitimate protests against opponents who are not breaking rules 6) verbal abuse of event staff 7) disrespect/personal attacks towards the IFO series, track host, and/or fellow contestants.