¶ 5. PLAFIT PROCAR TECH RULES

Art. 7B: PROCAR BMW M1 CARS
7B.1. GENERAL DESCRIPTION
DEFINITION - PROCAR BMW M1 cars (Group 4) are always a 1/24th copy of a race car having been seen in competition from 1979 to 1980 at the BMW PROCAR Series. They are used for the Franco Gianotti Trophy and the Model Car Production Worlds. Organiser of the Gianotti Trophy decides upon which race cars of which year will be ALLOWED at the start. It will always be cars having raced together the same year in the same type of event.
7B.2. WEIGHT, DIMENSIONS & GROUND CLEARANCE
(1) WEIGHT - (i) The overall weight of a car (complete assembled and race ready) must be min. 200 gram. Adding ballast on an area below 10mm of the bottom line of the body is NOT ALLOWED. (ii) Dimensions and weights can be checked by the race directors at any time. By incorrect results the concerned team has to arrange – always under racing time – immediately all the needed change(s) to make the car legal again.
(2) CORRECTIONS ON BODY WEIGHT - If the complete assembled body including all body mounting parts did not reach the minimum weight, additional ballast (lead weight) has to be added at the inside of the body. These additional weight must be placed under both door windows in an area of 10mm above of the bottom line of the door panels.
(3) DIMENSIONS AND SPUR - (i) At no point a car, standing on the track, may be wider than 83.2mm and never be lower than 5.2mm. (ii) The maximum spur width of the front axle assembly is 81mm (always measured from the outside of one wheel to the outside of the other wheel) and 83mm for the rear axle. 
(4) GROUND CLEARANCE - (i) The minimum ground clearance between the underside of the complete and ready build car and the track during the qualification and at the start must be min. 1.0mm (with the car standing still on a flat surface and measured between the rear axle and the end of the chassis). During the race the minimum ground clearance between the underside of a complete chassis (that means including the mounting screws, spur gear plus body holders) and the track must be min. 0.4mm (measured with mounted body on a flat surface). After the race the minimum ground clearance at the rear end must be min. 0.4mm (with the car standing still on a flat surface and measured between the rear axle and the end of the chassis) with all other parts not touching on the track surface. (ii) During and after the race the body and plastic parts of the body are ALLOWED to be lower as the minimum ground clearance of 0.4mm, as long as the plastic is not touching on the track surface (control is done with still standing car on a flat surface).

7B.3. PLAFIT CHASSIS
(1) MAKE AND TYPE - Only the Plafit SUPER Expert 24 Plus Chassis (the famous Plafit SLP chassis) as supplied under Ref.-No.: PF.1700KSLP is ALLOWED to use. All chassis parts (except ALLOWED optional parts) could be replaced only by the same original spare parts. A „mix of parts“ including chassis parts from other chassis types or made in different materials is NOT ALLOWED. All chassis mounting parts like screws (in the case of screws the longest useable cone head screw can not extend a max. length of 10mm), washers, nuts, spacers including axle spacers are FREE to choose as long as these parts are unmodified (for example the thickness of screw heads is NOT ALLOWED to be reduced) standard equipment available from the Plafit range.
(2) CHASSIS PARTS - All chassis parts (guide holder, front- and rear axle mounts, motor mount bracket, chassis main plate included) plus all body mounting parts (including „H“-subframe and mounting plates) must be used in standard shape as produced by the manufacturer and have to be mounted together in standard form at their original fixing points. The use of spacers etc. between the front or rear axle holders and the chassis mountings is NOT ALLOWED. Beside the legal modifications (see art. 7B.3.3) all changes on the chassis (as soldering, drilling or cutting etc.) are NOT ALLOWED in all forms and kind of variations. The use of legal optional parts is FREE of choose.
(3) ALLOWED CHASSIS MODIFICATIONS - Beside the original spare parts the following optional and tuning parts (Ref.-No. given in caps) are ALLOWED to use without additional modifications:
(i) BALLAST - Additional trim ballast is only ALLOWED in form of lead weight which has to be mounted on top of the chassis (including the top of the ground plate and „H“-subframe plate). All lead weight must be fixed in the way that no weight is extending outside the given shape of the chassis and have to be invisible from underside view.
(ii) SUSPENSION SPRINGS - Chassis Suspension Springs are ALLOWED to use. The springs can be used in soft, medium or hard tension (PF.1320, PF.1320A, PF.1320B).
(iii) H-PLATE BODY MOUNT - The body mount subframe („H“-plate) must be or unmodified original shape or may be replaced by the 49mm (PF.1710), 55mm (PF.1710B) or 61mm (PF.1710C) body mount subframe, all or not in adjustable (res. PF.1710T, PF.1710BT,PF.1710CT) form. The subframe can be fixed flexible or inflexible (rigid) on the main plate.
(iv) PAIR OF BODY HOLDER PLATES - Original pair of body holders may be replaced 6mm (PF.1707B), 7mm (PF.1707C) or 9mm (PF.1707E) pair of body holder plates. There is always a single holder per side, but the same type must be used on both sides. The body holders can be formed when obligatory needed to mount the body on the chassis. Only the necessary fixing parts are ALLOWED to be used in combination with the body holders. The mount plates plus holders must be fixed on top of the subframe as standard equipped. The use of spacers between the mount plates and subframe is ALLOWED. Pair of body holder distances PF.1707B2 is ALLOWED.
(v) FRONT AXLE HOLDERS - The original front axle holders may be replaced by the 5.5mm high (PF.1704) or 6.5 mm high (PF.1704B) front axle holders. Use of 3.5mm front axle holder PF.3304 is ALLOWED. For lowering the front chassis one can use part PF.3304E2.
(vi) GUIDE HOLDER - The original guide holder may be replaced by part PF.1703. Genuine guide holders can be formed by bending. The guide – but only one guide per car – including fixing nut, washers, braids plus additional mounting clips (for solder on the motor wires) and motor lead wires are FREE to choose. Contact fluids to add on braids (for example MURA “Tiger Milk”, SLICK 7 “Voodoo”) are ALLOWED for use.
(4) MISCELLANEOUS CHASSIS RULES - (i) All modifications resulting in a lower weight are NOT ALLOWED. Chassis components (including motor mount bracket) are ALLOWED to be adjusted and to fine sandpaper the surface for an extra perfect fit. 
(ii) The use of SIGMA security nuts (SG.8713), fine spacers (SG.8225, SG.8226, SG.8227) and SIGMA wheel stoppers (SG.8220) is ALLOWED.
(iii) The front and rear axles are free to choose as long as they made of a single piece solid steel (carbon axles are NOT ALLOWED) with an outer diameter of 3mm. Thus: only ONE front axles, not two short parts.
(iv) Use of camber fronts is FORBIDDEN.
(v) The use of heat absorbing paste etc. is NOT ALLOWED.
7B.4. MOTOR, GEAR AND PINION
(1) MOTOR
(i) MAKE & TYPE - As motor only the PS4000 IMCA of ProSlot is ALLOWED. Motor will always be handout and tagged by the race direction. The motor wires are FREE to choose. The wires also can be optionally guided by an additional loop behind the front axle. Lubrication/oiling of the motor is ALLOWED. The motor has to be kept absolutely standard. Any modification on the motor including the can (to sandpaper etc.) is NOT ALLOWED. To open the motor is strictly FORBIDDEN. Already little marks showing a possible opening or modification will automatically result in DISQUALIFICATION.
(ii) POWER - The supplied power range is rating (depending to tracks conditions) between 14 and 14.6 volts. The exactly driven voltage must be announced by the race directors before the first free practise. After the said voltage is fixed and has to be carried on without a change for the complete race event.
(iii) FIXATION - Motor must be fixed by screw(s) only.  Additional motor fixing by glue or soldering is FORBIDDEN.
(2) GEAR AND PINION
(i) SPUR GEAR - Only SIGMA or SCALEAUTO spur gears are ALLOWED to use on rear axle. The amount of teeth is FREE to choose. The gear has to be kept standard (optionally the plastic ring can be secured by glue on the changeover area to the metal boss).
(ii) PINION - The motor pinion is FREE to choose. Glue fixing or soldering of the pinion on the armature shaft is ALLOWED.
7B.5. WHEELS, AXLES & BEARINGS AND SPUR
(1) FRONT WHEELS
(i) MAKE & TYPE - Only genuine SIGMA hubs (SG.8018P) in lightweight version with 8 x 4.5mm drilled holes (sizing:  diameter 17.5mm with 8mm width) are ALLOWED to be used.
(ii) WHEEL INSERTS - Correct wheel inserts (made from solid plastic, metal or resin) have to be fixed inside the hubs for the whole race time. In case of a lost insert the car must stop and an insert has to be refitted again. All hubs must be set screw fixed on the axle. Independent rotating front wheels are NOT ALLOWED.
(iii) FRONT WHEEL DIMENSIONS - A complete wheel (tyre fixed on hub) must have an outer diameter of min. 22.3mm. The tyres must be 8mm width with a min. of 5mm touching the track surface. Both wheels must turning when the car is moving.
(iv) TYRES - Front wheel tyres are always SIGMA (SG.8408), 17mm inner diameter, width 8mm and lowered from an outer diameter of 28mm to 22.3mm. The running surface of the tyres can be optionally sealed or hardened by the use of varnish or super glue covering.
(2) REAR WHEELS
(i) MAKE, TYPE & DIMENSIONS - Rear rims are always SCALEAUTO (SC.4011) 17mm outer diameter and 16mm width.  Wheels must be set screw fixed on the axle.
(ii) WHEEL INSERTS - Cf. art 7B5.1.iii.
(iv) TYRES - Rear tyres are always SIGMA Black Magic (SG.8837) 16mm width with 16.5mm inner diameter and  27mm high. They may be lowered to 24.5mm being the minimum diameter for the rear wheels. The rear wheels must carry their correct original markings during the complete race event on sanction of DISQUALIFICATION. Racers using their own BMW M1 (not he handout car) must warn the organiser by mail, at least 45 days before the race, that they wish to drive their own car (at even rounds), so that organiser can prepare the rear tyres which must be fixed under the eyes of an officia.l
(3) AXLES - Only 3mm diameter steel axles, never wider than 80mm are ALLOWED.
(4) BEARINGS - Only genuine SIGMA ball bearings (SG.8261) are ALLOWED for use. The ball bearings can be optionally glued in place. The enlargement of the ball bearings mounting holes in both front and rear axle holders is FORBIDDEN.
(5) SPUR - The maximum spur width of the front and rear axle assembly is 80mm (always measured from the outside of one wheel to the outside of the other wheel).
7B.6. BODY, INTERIOR & LIGHTS
(1) MATERIAL, MAKE & TYPE - Only mass-produced bodies in injected hard plastic - thus NO resin, NO GFK, NO carbon, NO PETG, NO lexan - at scale 1/24th of model kit released by Revell  under ref. #07247 is allowed. Any other model car kit of the BMW M1 PROCAR is NOT ALLOWED. Only original windows may be used (no lexan versions). All parts to make the exterior body, as found in the kit, must be used. Laminated bodies are NOT allowed. Dremeling out of the smallest part of the body is STRICTLY FORBIDDEN. Racers found with a dremeled out body will be disqualified for the complete meeting.
(2) BODY EXTERIOR - Bodies must be equipped with: (i) a windshield, (ii) side and rear window, (iii) exhaust pipes, (iv) front splitter, (v) rear diffuser (vi) rear spoiler, (vii) rear view mirrors, (viii) windshield wiper. Mirrors and rear spoiler may be mounted on a FREE to choose flexible material. Rear spoiler, however, must always be in horizontal position, otherwise the race direction can oblige the car to make a pit stop to adjust the spoiler.
(3) BODY INTERIOR -  Interior must contain at least following 3-dimensional items : (i) dashboard, (ii) steering wheel, (iii) gear change lever, (iv) painted fire extinguisher, (v) seat, (vi) painted driver figure with legs, (vii) painted head/helmet combination in a hard plastic material. A lexan interior is always ALLOWED under the strict condition that it covers the chassis parts. As interior we advise those released by Nick de Wachter Parts.
(4) BODY FIXING - Body fixing on the body mounts can be done only by glue using the standard mounting rubber (PF.1212 or SIGMA SG.8214) or optionally directly (without rubber) on the mountings. Glue fixing is only possible on the given area of the body mounts surface. Adding or gluing ballast into the mountings is NOT ALLOWED.
(5) BODY REINFORCEMENTS -  Body reinforcements are possible but must be always fixed in a distance of min. 10mm over the bottom line of the body. Reinforcements placed lower as 10mm over the bottom line can only be done by using standard mounting rubber (PF.1212 or SIGMA SG.8214) in combination with flexible mounting glue. A flexible mounting glue (for example HENKEL „Pattex“ oder PLAFIT „Magic Glue“) is a glue wich can be pierced by a pin and wich also reacts as material disconnecting by the use of cleaning-/lighter fluids (for example ESSO 'Tiger').
(6) RACE NUMBERS - Cars must be equipped with the correct racing numbers, applied in the same form and on the same place as on the original race car.