2005 NHRA Rule Revisions

National Dragster, Aug 19, 2005

As of July 5, 2005

Occasionally, corrections or additions are made to the NHRA drag racing rules after the NHRA Rulebook has been printed. The following amendments will be published in National DRAGSTER until the 2006 Rulebook is printed. In cases where amendments apply to items published in the current Rulebook, page numbers are given for handy reference.

E.T. Section

Page 28 (3/05)

Protective Clothing: Replace last part of eighth paragraph with "gloves and boots meeting SFI Spec 3.3/15 mandatory."

Page 28 (4/05)

Protective Clothing: Add to end of section, "Naturally aspirated (all others including with alcohol): Jacket and pants meeting SFI Spec 3.2A/5 and gloves meeting SFI Spec 3.3/1 mandatory."

ADVANCED E.T.

Page 31 (2/05)

Protective Clothing: Replace bold part of fifth paragraph with, "Rearengine car equipped with nitrous oxide, turb.ocharged or supercharged:"

E.T. SNOWMOBILE

Page 37 (3/05)

Skis and Wheels: In illustration, change "9.5-inch maximum" to "9.5-inch minimum."

STOCK

Page 58 (2/05)

Carburetor: Replace fifth sentence with "Replacement carburetors permitted provided they are same model, type, throttle bore, and venturi size."

Page 58 (2/05)

Cylinder Heads: Add to end of first sentence, "or NHRA accepted."

Page 58 (7/05)

Connecting Rods: Add to end of section, "The use of rod and crank spacer bearings prohibited."

Page 60 (1/05)

oil Pump: Add to end of section, "Accumulator prohibited."

Page 61 (2/05)

Valve Springs: Add new second sentence, "Steel valve spring retainers mandatory."

Page 67 (4/05)

Class Weight Breaks: Replace the following, "K - 20.00 or more" and "L - 22.00 or more."

SUPER STOCK

Page 70 (2/05)

Cylinder Heads: Add to end of first sentence, "or NHRA accepted."

Page 70 (7/05)

Connecting Rods: Add to end of section, "The use of rod and crank spacer bearings permitted. Original housing bore size must be maintained (i.e. connecting rod, mains)."

Page 79 (7/05)

Transmission Shield, Automatic: Add new section with, "Cars in GT/AA through GT/GA must be equipped with a transmission shield meeting SFI Spec 4.1."

Page 72 (1/05)

Oil Pump: Add to end of section, "Accumulator permitted."

Page 82 (12/04)

Classes: Add to SS/ES class, "4-cylinder only."

Page 85 (2/05)

Tires: Add new section, "Tire tread may extend one inch outside of fender line in GS."

Page 85 (12/04)

Body: Add new second sentence, "ES through GS, fiberglass or other lightweight components restricted to hood, fenders, splash pans, valance panels, and rear deck lid are permitted."

COMP

Page 103 (1/05)

Cylinder Heads: Add new fifth sentence, "B/ED: true wedge and inline valve heads only."

Page 112 (1/05)

Cylinder Heads, Altereds: Delete "J" class from third sentence. "

Page 113 (12/04)

Supercharger: Delete fourth sentence.

TOP ALCOHOL DRAGSTER

Page 146 (2/05)

Class Weight Breaks, Nonsupercharged single engine, nitromethane: Add to end of section, "Nitromethane content restricted to 98 percent maximum. All fuels other than nitromethane and methanol prohibited."

Page 147 (2/05)

Engine: Replace second sentence of second paragraph with, "Any modifications or alterations to engine blocks, cylinder heads, and engine components, will be deemed to be a change in design and therefore prohibited. This includes any redesign, reconfiguration, and/or significant modifications to existing components. Refer any development, redesign, reconfiguration, and/or modification questions with respect to parts outlined to the NHRA technical department to determine whether permitted or prohibited."

Page 148 (12/04)

Oil Lines: Replace first sentence with "For vehicles that compete at national events, all flexible-pressure oil lines, excluding return lines and any line SOpsi or lower in pressure, must use a factory-crimped connection and be pressure tested and labeled."

Page 148 (2/05)

Oil Lines: Add new fifth sentence, "For vehicles that compete at divisional events, all pressurized flexible oil-system lines must use factory crimped and/or commercially available connections. All of the lines must be hydrostatically tested to SOOpsi for 30 seconds with no indications of separation, weeping, leaking, etc."

Page 148 (12/04)

Supercharger: Delete third sentence.

Supercharger: Replace third paragraph with "Maximum overdrive limits are 2.15psi and 1.70 Roots."

Page 150 (12/04)

Transmission: Delete from sixth sentence of second paragraph, reference to "titanium."

TOP ALCOHOL FUNNY CAR

Page 155 (12/04)

Supercharger: Replace first paragraph with "Maximum overdrive limits are 1.92psi and 1.70 Roots."

Page 155 (2/05)

Parachute: Add new section with, "The parachute floor must be flat and may not extend more than six inches rearward or beyond the parachute pack, whichever is less. The measurement will be taken from the mounting point on the rear of the body. The use of a wicker prohibited."

PRO STOCK MOTORCYCLE

Page 163 (12/04)

Air Intakes: Replace first sentence with "Scoops external of the body or air intake hoses prohibited, unless NHRA accepted."

PRO STOCK

Page 168 (2/05)

Parachute: Add new second sentence, "Parachutes must be mounted so that the maximum measurement between the outside edge of the two parachutes does not exceed 24 inches."