CLASS STRUCTURE

2008 CLASS STRUCTURE:
Super Pro: 7.00 - 11.49; 500 Full Tree, Electronics Allowed
Pro: 7.50 - 13.99; 500 Full Tree, No Electronics
Sportsman: 11.50 and slower; 500 Full Tree; No Electronics, Slicks Allowed
Sport Compact: .500 Full Tree; Slicks Allowed
Street Legal: D.O.T. approved street tires only
Junior Dragster: Youth, 8 - 18 yrs. of age
 
(Super Pro Previously 7.50-11.49)

 

SIR ELECTRONIC RULES- 2008- ACCEPTED

 

SUPER PRO ET:  7.00 – 11.49, Full Tree

  1. Computer: Prohibited unless stock OEM equipment or OEM replacement. See NHRA General Regulations 9:1.
  2. Data Recorders:  Permitted.  See NHRA Rule Book general regulations 9:2 & 9:10.
  3. Delay Box: 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 the tech inspector.  See class and G/Regs 8.
  4. Trans brake:  Permitted.
  5. Line lock:  Four-wheel line lock permitted.
  6. Automated Shifter:  Permitted.
  7. Throttle Control:  Permitted per NHRA Rule Book.
  8. Ignition:  Stutter boxes prohibited.  Three-steps, Two-steps, or single stage rev limiters permitted.  Any rpm limiting device legal unto themselves but altered or installed so as to function as a down-track rpm controller, prohibited. See NHRA General Regulations 8:3.
  9. Switches & Buttons:  All switches and/or buttons must be standard mechanical connection type.

Infrared lasers, retinal scan, fingerprint, light source or any other non-mechanical type switch and/or button prohibited.

PRO ET:  7.50 – 13.99, Full Tree

  1. Computer:  Prohibited unless stock OEM equipment or OEM replacement.  See NHRA General Regulations 9:1.
  2. Data Recorders:  Prohibited.  See NHRA Rule Book general regulations 9:2 & 9:10.
  3. Delay Boxes:  Prohibited.  See NHRA General Regulations 8:2.
  4. Trans brake:  Permitted. Transbrake switch must be NHRA-accepted.
  5. Line lock:  Four-wheel line lock permitted. Line lock switch must be NHRA-accepted.
  6. Automated Shifter: Prohibited.  Electronic or pneumatic shifter permitted; must be manually controlled by driver.
  7. Throttle Control:  Throttle must be manually operated by the driver’s foot.  Electronics, pneumatics, hydraulics or any other device may in no way affect the throttle operation.  A dead-stop under the carburetor or gas pedal is permitted.  Throttle timers, counters prohibited.
  8. 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.  See NHRA General Regulations 8:3.
  9. Switches & Buttons:  All switches and/or buttons must be standard mechanical connection type.  Infrared lasers, retinal scan, fingerprint, and light source or any other non-mechanical type switch and/or button prohibited.

SPORTSMAN ET:11.50 & Slower, Full Tree

  1. Computer:  Prohibited unless stock OEM equipment or OEM replacement.  See NHRA General Regulations 9:1.
  2. Data Recorders:  Prohibited.  See NHRA Rule Book general regulations 9:2 & 9:10.
  3. Delay Boxes:  Prohibited.  See NHRA General Regulations 8:2. 
  4. Trans brake:  Prohibited.
  5. Line lock:  Four-wheel line lock prohibited.  Two-wheel line lock permitted on non-drive wheels only. Line lock switch must be NHRA-accepted.
  6. Automated Shifter:  Prohibited unless OEM equipped. Electronic or pneumatic shifter permitted; must be manually controlled by driver.
  7. Throttle Control:  Throttle must be manually operated by the driver.  Electronics, pneumatics, hydraulics or any other device may in no way affect the throttle operation.  A dead-stop under the carburetor or gas pedal is permitted.  Throttle timers, counters prohibited.
  8. Ignition:  Stutter boxes prohibited.  Single stage “high side only” rev limiters permitted.  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.  Crank trigger system prohibited on vehicles running 14.00 and slower, unless OEM distributorless ignition.  Ignition systems equipped with built-in two step rev limiters must have the “low side” (start line) function disabled.  See NHRA General Regulations 8:3.
  9. Switches & Buttons:  All switches and/or buttons must be standard mechanical connection type.  Infrared lasers, retinal scan, fingerprint, and light source or any other non-mechanical type switch and/or button prohibited.

PRO BIKE/SLED ET:  7.50 & Slower, Pro Tree
            Same electronic rules as Super Pro.

 

Refer to the 2008 NHRA Rulebook for all applicable safety requirements in each ET Bracket.

 

2008 NHRA E.T. QUICK REFERENCE CHART
Y = Required C = Convertibles
Number Refers to General Regulations
In no way is this Quick Reference Chart intended to supersede
or replace the current NHRA Rulebook.

Quarter-Mile
e.t.s

6.00
to
7.49

7.50
to
9.99

10.00
to
10.99

11.00
to
11.49

11.50
to
13.99

14.00
to
Slower
Aftermarket Rear Axles
Y
Y
Y
2:11
2:11
2:11
Arm Restraints (Open Cars)
Y
Y
Y
Y

10:3
11:99
10:3
Auto Trans Flexplate (SFI 29.1)
Y
Y
2:14
2:14
2:14
2:14
Auto Trans Reverse Lockout
Y
Y
Y
Y
Y
Y
Bellhousing (SFI 6.1/6.2)
Y
Y
Y
Y
2:10
2:10
Driver Restraint System (SFI 16.1)
Y
Y

Y
10:5

Y
10:5

C
10:5

10:5
10:11
Driveshaft Loop
Y
Y
Y
Y
2:4
2:4
Electric 16.00 & Quicker
Y
Y
Y
Y
Y
2:4
Flexplate Shield (SFI 30.1)
Y
Y
2:14
2:14
2:14
2:14
Flywheel/Clutch (SFI 1.1/1.2)
Y
Y
Y
Y
2:5
2:5
Harmonic Balancer (SFI 18.1)
Y
Y
Y
Permitted
Permitted
Permitted
Helmet (Snell 2000 or SFI 41.1A min.)
Y
Y
Y
Y
Y
10:7
Liquid Overflow
Y
Y
Y
Y
Y
Y
Master Electrical Cutoff
Y
Y

8:4
135 mph
8:4
8:4
8:4
Neck Collar
Y
Y
10:8
10:8
10:8
10:8
NHRA Competition License
Y
Y
10:4
10:4
10:4
10:4
NHRA Chassic Sticker
Y
Y
4:4
4:4
4:4
4:4
Padding Roll Bar/Cage

Y
SFI
Y
Y
Y

10:6
135 mph

10:6
135 mph
Parachute
Y
Y

4:8
159 mph
4:8
4:8
4:8
Pressurized Bottles DOT (1800)
Y
Y
Y
Y
Y
Y
Protective Clothing
Y
Y
Y
Y
10:10
10:10
Roll Bar
Y
Y
C/13.49
4:10
Roll Cage
Y
Y

Y
135 mph
4:11
4:11
4:11
SFI Chssic Specification
Y

4:4
180 mph
4:4
4:4
4:4
4:4
Supercharger Restraints
Y
1:11
1:11
1:11
1:11
1:11
Taillight
Y
Y
Y
Y
Y
Y
Transmission Shield (SFI 4.1)
Y
Y
Y
2:14
2:14
2:14
Window Net (Full-Bodied Cars)
Y
Y

6:3
10:3

6:3
10:3

6:3
10:3

6:3
10:3