IHRA TECHNICAL BULLETINS :
Please use this area to keep up to date with the Latest in Rules and updates as they are implemented. This area is designed for both Professional and Sportsman Classes.
Field Size Clarification – Supercharged Outlaws – Top Sportsman
Class Reg 31620, Supercharged Outlaw
This bracket consists of all vehicles that qualify between 0.00 and 7.99 seconds or (1/8 mile equivalent)
Class Reg 32210, Top Sportsman
This bracket consists of all sedans that qualify between 0.00 and 8.99 seconds or (1/8 mile equivalent)
Junior Dragster Rule Amendment
Class Reg 29000, Junior Dragster
If A/JD, and during qualifying, then ET quicker than 7.90 seconds but no quicker than 7.80 seconds permitted, and then only once per event.
Class Reg 29020, Junior Dragster
If B/JD, and during qualifying, then ET quicker than 8.50 seconds but no quicker than 8.40 seconds permitted, and then only once per event.
Class Reg 29030, Junior Dragster
If C/JD, and during qualifying, then ET quicker than 11.90 seconds but no quicker than 11.80 seconds permitted, and then only once per event.
Class Reg, 28940, Junior Dragster, Vehicle Controls
Throttle and brake, operated by foot. Positive throttle return spring in use.
Class Reg 28780, Junior Dragster, Engine, Exhaust, Muffler
Silencer or Muffler Optional.
Class Reg 28790, Junior Dragster, Engine, Exhaust, Muffler
As a Friendly Reminder this rule will be enforced
Class Reg 29050, Junior Dragster
If parent/guardian fails to withdraw their racer from event due to exceeding ET cut-off limits, then racer is suspended for 2 meetings and fined $1,000
BYE RUNS: Rule Number # 7860 All bye runs must produce a winner.
HANDS OF STARTER: Rule Number # 7855 Hands of the Starter A vehicle is deemed to be in the hands of the starter when the front wheel/s enter the designated burnout area.
IHRA Australia would like to clarify the ET cut offs for the 2016/2017 season for the following classes
Supercharged Outlaws, Top Sportsman, Super Sedan and Super Street
The following ET limits apply to the below brackets and will be run at all 400 Thunder Championship events:
Supercharged Outlaws → 0 – 7.99
Top Sportsman → 0 – 8.99
Super Sedan → 8.50 – 10.99
Super Street → 10.00 – 12.99
Pro Stock Motorcycle Weightbreaks effective June 2016
Suzuki 2 Valve 5.75 lbs. per Cube
Suzuki 4 Valve 5.75 lbs. per Cube
Kawasaki 2 Valve 5.75 lbs. per Cube
Kawasaki 4 Valve 5.75 lbs. per cube
Buell Billet Engine 665 lbs.
Kawasaki’s permitted to use Billet Crankcases.
The following points are also in place:
Engine sealing is Mandatory and any issues resulting in clarification of an engine size that hasn’t been tagged will result in the cylinder head being removed Post Event for measurement at the track. Failure to do so may/can void any results from the event.
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