XDRA Build Rules (updated 23/7/2006)

All Pro classes run to a Pro Tree during a National/special event.  Other races are subject to an index or bracket/dial in. 

Note that all cars should be marked with a race number and class designation on window and/or body to be legal in any class.  Any car that is not inside the rules of it’s designated class can run as an ‘Experimental’ class (EXP) but is not allowed to set records/enter Pro events in any class until made legal.

Unofficial classes (SC/O, OUTLAW) are also not allowed to participate in Pro events unless in an open class index.

Pro class Sportsman class

AA/Fuel (AA/FC, AA/FD, AA/FA, AA/AP) Body – any Funny Car, Dragster, Altered, or Gasser body. - may not be cut above manufacturers intended cut line Chassis – any (bearings allowed) - Max wheelbase 150mm, no max for dragsters, (center rear axel to center front axel) - Min wheelbase 110mm, 203mm for dragsters - Max length of wheelie bars 127mm (Dragsters have no max wheelbase but are required to have a max overall length, from the extreme front of car to center of wheelie bar wheels, of 450mm) Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor(s) – Any (bearings allowed) (more than one motor allowed) Minimum weight – 45 grams	P/S (Pro Stock) Body – 1985 or newer American or Australian sedan/saloon style body - Must not be cut above manufacturers intended cut line - May not have wheel wells enlarged - Must have Pro style hood scoop - Must have front and rear bumpers as delivered by factory on original full scale cars (5mm min, rear overhang) - A rear wing is allowed, max length – 40mm Chassis –Any Construction except aluminum, (Any brass, steel, etc tube may be used for body mounts. - Max length of wheelie bars 127mm - Max wheelbase length, 115mm - Min wheelbase length, 90mm - Any bearings/oilites Gears - Any Front wheels – Min diameter 1/2” Rear wheels – Min diameter 24mm Motor (bearings allowed) - Any setup - Any factory tagged 27 armature, Min stack length .440” Minimum weight – 90 grams
TA (Top Alcohol, BB/FC equivalent) Body – any Funny Car, Dragster, Altered, or Gasser body. - May not be cut above manufacturers intended cut line. Chassis – any (bearings allowed) - Max wheelbase 150mm, no max for dragsters, (center rear axel to center front axel) - Min wheelbase 110mm, 203mm for dragsters - Max length of wheelie bars 127mm - (Dragsters have no max wheelbase but are required to have a max overall length, from the extreme front of car to center of wheelie bar wheels, of 450mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor – bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or gluing Magnets – Any unmodified, ceramic, full height (multi segments OK) - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 20 arm - Minimum diameter .510” - Minimum stack length .440” Minimum weight – 70grams	P/M (Pro Modified) Body – Any hard plastic/resin moulded (model kit body, no vacuum formed) - May be Chopped, lowered, have body detail modified - Any modifications must allow room for “scale” driver, must have top hat, blower, injector stacks or air scoops protruding through bonnet. Chassis – any non aluminum construction (Bearings allowed) - Max wheelbase 150mm, none for dragsters, (center rear axel to center front axel) - Min wheelbase 90mm, 254mm for dragsters - Maximum length of wheelie bars 127mm (Dragsters have no max wheelbase but are required to have a max overall length, from the extreme front of car to center of wheelie bar wheels, of 450mm) Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor – Bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height, (multi segments OK) - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 12 arm - Minimum diameter .510” Minimum weight – 120 grams
X/Mod (Xtreme Modified) Body - Any hard plastic/resin moulded (model kit body, no vacuum formed) - May be Chopped, lowered, have body detail modified - any modifications must allow room for “scale” driver Chassis – any non aluminum construction (No Bearings) - Max wheelbase 150mm, none for dragsters, (center rear axel to center front axel) - Min wheelbase 90mm - Maximum length of wheelie bars 127mm (Dragsters have no max wheelbase but are required to have a max overall length, from the extreme front of car to center of wheelie bar wheels, of 450mm) Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor– NO bearings Can – Any unmodified “D” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or gluing Magnets – Any unmodified, ceramic, full height, one piece, “D” size magnet May be glued, shimmed, honed Endbell – Any “D” can type - May be machined and/or drilled - Any hardware may be used Armature – Any Super 16D Arm Minimum weight – 120 grams	RTR (Ready To Run) - Body – Any Door slammer, Altered, or Funny Car body - Must not be cut above manufacturers intended cut line Chassis – Unmodified Parma “The Edge” drag chassis only (No Bearings) - May have plating removed to facilitate soldering - Only Parma, square, 1/8^th” rear axel oilites may be used (may be soldered) Front wheels – min dia 1/2” Rear wheels – min dia 24mm Gears – any 48 pitch solder on or push on pinion - any 48 pitch, inline, 1/8” axel, plastic crown/spur gear (gear savers may be used) Motor – No Bearings - Any sealed super 16D motor - Seal must remain undisturbed - Plating may be removed to facilitate soldering - Can Oilite may be soldered or glued - Any motor brushes and springs Min weight – 110 grams
PS/DB (Pro Stock Drag Bike) Body – Any bike body Chassis – Any (bearings allowed) Gears – Any (must be O ring or belt driven) Front wheels – Min diameter ½ inch Rear wheels – Min diameter 24mm Motor – (bearings allowed) Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or gluing Magnets – Any unmodified, ceramic, full height (multi segments OK) - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 12 arm Minimum diameter .510” Minimum weight – 90 grams	A/FC Body – any Funny Car body. - may not be cut above manufacturers intended cut line Chassis – any (bearings allowed) - Max wheelbase 150mm (center rear axel to center front axel) - Min wheelbase 110mm - Max length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– Bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height (multi segments OK), “C” size - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 20 arm - Minimum diameter .510” - Minimum stack length .440” Minimum weight – 80 grams
B/FC Body – any Funny Car body. - may not be cut above manufacturers intended cut line Chassis – any (bearings allowed) - Max wheelbase 150mm (center rear axel to center front axel) - Min wheelbase 110mm - Max length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– No Bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height (multi segments OK), “C” size - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 12 Minimum diameter .510” Minimum weight – 80 grams	C/FC Body – any Funny Car body. - may not be cut above manufacturers intended cut line Chassis – any (no bearings allowed) - Max wheelbase 150mm (center rear axel to center front axel) - Min wheelbase 110mm - Max length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– NO bearings Can – Any unmodified “D” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height, one piece, “D” size magnet May be glued, shimmed, honed Endbell – Any “D” can type - May be machined and/or drilled - Any hardware may be used Armature – Any Super 16D Arm Minimum weight – 80 grams
D/FC Body – any Funny Car body. - may not be cut above manufacturers intended cut line Chassis – any (no bearings allowed) - Max wheelbase 150mm (center rear axel to center front axel) - Min wheelbase 110mm - Max length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– Sealed Super 16D Only - Seal may not be disturbed in any way - No modifications allowed, except for the removal of plating from can to facilitate soldering - Any brushes and springs may be used Minimum weight – 80 grams	E/FC Body – any Funny Car body. - may not be cut above manufacturers intended cut line Chassis – any (no bearings allowed) - Max wheelbase 150mm (center rear axel to center front axel) - Min wheelbase 110mm - Max length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– No Bearings allowed Can – Any unmodified “D” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height, one piece, “D” size magnet May be glued, shimmed, honed Endbell – Any “D” can type - May be machined and/or drilled - Any hardware may be used Armature – Any Standard 16D Arm Minimum weight – 80 grams
F/FC Body – any Funny Car body. - may not be cut above manufacturers intended cut line Chassis – any (no bearings allowed) - Max wheelbase 150mm (center rear axel to center front axel) - Min wheelbase 110mm - Max length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– Sealed Standard 16D Only - Seal may not be disturbed in any way - No modifications allowed, except for the removal of plating from can to facilitate soldering - Any brushes and springs may be used Minimum weight – 80 grams	A/D Body – Any Dragster body - Any “scale appearing” rear wings are allowed rear of the cockpit area - Any “scale appearing” front wings are allowed forward of the centerline of the front axel Chassis – Any (bearings allowed) - Min wheelbase 203mm - Max length of wheelie bars 127mm - Maximum overall length (front tip to centerline of wheelie bar wheels) 450mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– Bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height (multi segments OK), “C” size - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 20 arm - Minimum diameter .510” - Minimum stack length .440” Minimum weight – 90 grams
B/D Body – Any Dragster body - Any “scale appearing” rear wings are allowed rear of the cockpit area - Any “scale appearing” front wings are allowed forward of the centerline of the front axel Chassis – Any (bearings allowed) - Min wheelbase 203mm - Max length of wheelie bars 127mm - Maximum overall length (front tip to centerline of wheelie bar wheels) 450mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– No Bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height (multi segments OK), “C” size - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 12 Arm - Minimum diameter .510” Minimum weight – 90 grams	C/D Body – Any Dragster body - Any “scale appearing” rear wings are allowed rear of the cockpit area - Any “scale appearing” front wings are allowed forward of the centerline of the front axel Chassis – Any (no bearings allowed) - Min wheelbase 203mm - Max length of wheelie bars 127mm - Maximum overall length (front tip to centerline of wheelie bar wheels) 450mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– NO bearings Can – Any unmodified “D” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height, one piece, “D” size magnet May be glued, shimmed, honed Endbell – Any “D” can type - May be machined and/or drilled - Any hardware may be used Armature – Any Super 16D Arm Minimum weight – 90 grams
D/D Body – Any Dragster body - Any “scale appearing” rear wings are allowed rear of the cockpit area - Any “scale appearing” front wings are allowed forward of the centerline of the front axel Chassis – In line, 1/8^th axel only (no bearings allowed) - Min wheelbase 203mm - Max length of wheelie bars 127mm - Maximum overall length (front tip to centerline of wheelie bar wheels) 450mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– Sealed Super 16D only - Seal may not be disturbed in any way - No modifications allowed, except for the removal of plating from can to facilitate soldering - Any brushes and springs may be used Minimum weight – 90 grams	E/D Body – Any Dragster body - Any “scale appearing” rear wings are allowed rear of the cockpit area - Any “scale appearing” front wings are allowed forward of the centerline of the front axel Chassis – Any (no bearings allowed) - Min wheelbase 203mm - Max length of wheelie bars 127mm - Maximum overall length (front tip to centerline of wheelie bar wheels) 450mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– No Bearings allowed Can – Any unmodified “D” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height, one piece, “D” size magnet May be glued, shimmed, honed Endbell – Any “D” can type - May be machined and/or drilled - Any hardware may be used Armature – Any Standard 16D Arm Minimum weight – 90 grams
F/D Body – Any Dragster body - Any “scale appearing” rear wings are allowed rear of the cockpit area - Any “scale appearing” front wings are allowed forward of the centerline of the front axel Chassis – In line, 1/8^th axel only (no bearings allowed) - Min wheelbase 203mm - Max length of wheelie bars 127mm - Maximum overall length (front tip to centerline of wheelie bar wheels) 450mm Gears - Any Front Wheels – Min diameter ½ inch Rear Wheels – Min diameter 24mm Motor– Sealed Standard 16D Only - Seal may not be disturbed in any way - No modifications allowed, except for the removal of plating from can to facilitate soldering - Any brushes and springs may be used Minimum weight – 90 grams	A/G Body – Any Doorslammer body - Must have hood scoop, top-hat blower or engine detail - Must not be cut above manufacturers intended cut line Chassis – any non aluminium construction (bearings allowed) - Max wheelbase 110mm (center rear axel to center front axel) - Min wheelbase 90mm - Maximum length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor– Bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height (multi segments OK), “C” size - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 20 arm - Minimum diameter .510” - Minimum stack length .440” Minimum weight – 90 grams
B/G Body – Any Doorslammer body - Must have hood scoop, top-hat blower or engine detail - Must not be cut above manufacturers intended cut line Chassis – any non aluminium construction (bearings allowed) - Max wheelbase 110mm (center rear axel to center front axel) - Min wheelbase 90mm - Maximum length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor– No Bearings allowed Can – Any unmodified “C” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height (multi segments OK), “C” size - May be glued, shimmed, honed Endbell – Any “C” can type - May be machined and/or drilled - Any hardware may be used Armature – Any factory tagged 12 Arm - Minimum diameter .510” Minimum weight – 90 grams	C/G Body – Any Doorslammer body - Must not be cut above manufacturers intended cut line Chassis – any non aluminium construction (no bearings allowed) - Max wheelbase 110mm (center rear axel to center front axel) - Min wheelbase 90mm - Maximum length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor– NO bearings Can – Any unmodified “D” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height, one piece, “D” size magnet May be glued, shimmed, honed Endbell – Any “D” can type - May be machined and/or drilled - Any hardware may be used Armature – Any Super 16D Arm Minimum weight – 90 grams
D/G Body – Any Doorslammer body - Must not be cut above manufacturers intended cut line Chassis – any non aluminium construction (no bearings allowed) - Max wheelbase 110mm (center rear axel to center front axel) - Min wheelbase 90mm - Maximum length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor– Sealed Super 16D only - Seal may not be disturbed in any way - No modifications allowed, except for the removal of plating from can to facilitate soldering - Any brushes and springs may be used Minimum weight – 90 grams	E/G Body – Any Doorslammer body - Must not be cut above manufacturers intended cut line Chassis – any non aluminium construction (no bearings allowed) - Max wheelbase 110mm (center rear axel to center front axel) - Min wheelbase 90mm - Maximum length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor– No Bearings allowed Can – Any unmodified “D” can - May be notched for rear axel clearance - Plating may be removed to facilitate soldering and/or glueing Magnets – Any unmodified, ceramic, full height, one piece, “D” size magnet May be glued, shimmed, honed Endbell – Any “D” can type - May be machined and/or drilled - Any hardware may be used Armature – Any Standard 16D Arm Minimum weight – 90 grams
F/G Body – Any Doorslammer body - Must not be cut above manufacturers intended cut line Chassis – any non aluminium construction (no bearings allowed) - Max wheelbase 110mm (center rear axel to center front axel) - Min wheelbase 90mm - Maximum length of wheelie bars 127mm Gears - Any Front Wheels – Min diameter 1/2 inch Rear Wheels – Min diameter 24mm Motor– Sealed Standard 16D Only - Seal may not be disturbed in any way - No modifications allowed, except for the removal of plating from can to facilitate soldering - Any brushes and springs may be used Minimum weight – 90 grams	SUPERCHARGED OUTLAW (SC/O) and OUTLAW  Body – Any 4” (Flexi-car) body: -          (SC/O) post 1980 - Supercharger must be present (Super 16D motor) -          (Outlaw)pre 1980 - Atmospheric (no supercharger)(Standard 16D) Chassis – Any production based flexi-chassis (unmodified) - Maximum length of wheelie bars 127mm - Gears – Any - Front Wheels – Min diameter 1/2 inch - Rear Wheels – Min diameter 24mm - Motors – Sealed S16D and Super 16D -      Seal may not be disturbed in any way -      No modifications allowed, except for the removal of plating from can to facilitate soldering -          Any brushes and springs may be used Minimum weight – must be based on full chassis purchased

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