This is taken from the 2009 Drag Racing Rules & Regulations on Pacific Raceways' website. I think this ought to help you out.
6.2 The brackets for the E.T. tournament will be as follows:
7.50 – 11.99 Super Pro (electronics allowed)
7.50 – 13.99 Pro (No electronics)
12.00 – Slower Sportsman (No electronics)
7.50 – 14.99 Motorcycle (electronics allowed)
11.00 – Slower High School (No electronics)
10.0 Prohibited Devices
10.1 Super Pro (7.50‐11.99)
10.2 Computer: Prohibited unless stock vehicle by new car manufacturer. (NHRA Gen. Reg. 9:1)
10.3 Data Recorders: Permitted (in ET racing see Sec. 1A. Support Group 9) (NHRA Gen. Reg. 9:2)
10.4 Delay Boxes: Permitted, one box/device only attached to trans‐brake and or throttle timer only. Delay box may only display delay amount. All direct wiring must be clearly identifiable to tech inspector.
10.5 4‐Wheel line lock: Permitted
10.6 Automatic Shifter: Permitted
10.7 Ignition: Stutter boxes prohibited. Starting line and or “high side” rev limiters permitted. Two steps, rev limiters or any other rpm limiting devices, legal unto themselves but altered or installed so as to function as a down track rpm controller, prohibited.
10.8 Switches and Buttons: All switches and/or buttons must be standard mechanical connection type. Infrared laser, retinal scans, fingerprint, light source or any other non‐mechanical type switch and/or button prohibited.
11.0 Pro E.T. (7:50‐13.99)
11.1 Delay boxes: Prohibited
11.2 Throttle Control: the driver’s foot must manually operate Throttle control. Electronics, pneumatics, hydraulics or any other device may no way affect the throttle operations. Throttle timers, counters, prohibited.
11.3 Trans‐brake: Permitted
11.4 4‐wheel line lock; Prohibited
11.5 Automatic Shifter: Permitted
11.6 Computer: Prohibited unless stock vehicle by new car manufacturer. (NHRA Gen. Reg. 9.1)
11.7 Data recorders: (see NHRA Gen. Reg. 9.2 & 9.2A)
11.8 Ignition: Stutter boxes prohibited. Starting line and or “high side” rev limiters or any other rpm limiting devices, legal unto themselves but altered or installed so as to function as a down track rpm controller, prohibited.
11.9 No tow vehicle allowed.
12.0 Sportsman (12.00‐Slower)
12.1 Delay boxes, 4‐wheel line locks, trans‐brakes, automated shifters: prohibited.
12.2 Computer: Prohibited unless stock vehicle by new car manufacturer. (NHRA Gen. Reg. 9.1)
12.3 Data Recorders: (See NHRA Gen. Reg. 9.2 and 9.2A)
12.4 Throttle Control: the driver’s foot must manually operate Throttle Control. Electronic, pneumatics, hydraulics or any other device may in no way affect throttle operation. Throttle timers, counters prohibited.
12.5 Line locks: 2‐wheel line locks permitted on non‐drive wheels only.
12.6 OEM electronics, tachometers, single stage rev limiters: permitted.
12.7 Ignition: Stutter boxes prohibited. Starting line and or “high side” rev limiters or any other rpm limiting devices, legal unto themselves but altered or installed so as to function as a down track rpm controller, prohibited.
12.8 Switches & Buttons: (See 7.17 above)
12.9 No tow vehicles allowed.
13.0 Motorcycle (7.50‐14.99)
13.1 Delay boxes throttle control: Permitted
13.2 Computer, data recorder: Prohibited (See NHRA gen. Reg. 9.1, 9.2 & 9.2A)
13.3 Ignition: Stutter boxes prohibited. Starting line and or “high side” rev limiters permitted. Two steps, rev limiters or any other rpm limiting devices, legal unto themselves but altered or installed so as to function as a down track rpm controller, prohibited.
13.4 Switches & Buttons: (See 10.8 above)
13.5 No Scooters or mini bikes.
13.6 Split Tree/Motorcycles: The tree for motorcycle in eliminations is set up for a .500 full tree, those riders wishing to receive a .400 pro tree must display the dial‐ins as: (example 9.50P). Time trials will be run separately.
14.0 High school (11.00‐Slower)
14.1 High School representatives must be enrolled in high school or be a 2009 graduate.
14.2 Rear tires: Rear tires limited to maximum 10‐inch tread width. Must be a DOT street tire.
14.3 Electronics: Same as sportsman above.
14.4 Neither the student nor their car may be entered in any other eliminator at the event.
14.5 The vehicle must be a street‐legal car with a dial‐in of 11.99 or slower.
