| PRO FUEL | |
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MIKE PELRINE #1 PRO FUEL |
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Designation: “P/F” preceded by bike number. Reserved for nitro burning limited dragsters built specifically for drag racing. |
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Requirements and Specifications |
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1. Engine |
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(a) Engine: Must keep design features of Harley-Davidson engines (45°-90° push rod V-Twin). Single engine carburetted with transmission or fuel injected high gear with a maximum 151.1 c.i. displacement. Fuel injected engines of 132 C.I. or less may use transmission. No superchargers. Push rod after market heads, including four valve, are permitted. Crankcase and all fluid tanks must have vent tubes routed to an overflow can or have a non-spill breather system. ‘Bellypan’ scatter shield under engine is mandatory. Cylinder head restraint system mandatory. Must meet SFI spec. 46.1. Engine Restraints must be re-certified every 2 years. (b) Fuel System: Only one single throttle body with single plenum will be allowed. Any fuel system that is capable of adding fuel volume during the run is not allowed. Only single stage fuel systems are allowed. This means that the fuel system can only have one programmable bleed down function after the hit of the throttle. Only manually set timers are allowed for this function. Jet cans are legal under the same rules as fuel systems. Fuel systems with ways to add fuel after the launch or computer activated timers must be taken off the bike while racing at the event. Emergency fuel shut-off valve is mandatory. Shut-off must be attached to the rider with a lanyard of rawhide, wire, etc. Lanyard for secondary fuel shut-off must run through an eyelet, allowing the lanyard to be pulled in any direction, closing the shut-off. Handle bar mounted fuel shut off mandatory. (c) Fuel: Nitromethane. No nitrous oxide and nitromethane combinations. No propylene oxide. |
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| 2. Drive Train | |
| (a) Chain
and/or belt guard mandatory.
Must have front and rear guards to cover the width and at least the top run of the centre line of the sprocket of any chain or belts. Chain guard should be constructed from .060 inch steel or .125 inch aluminum mounted on at least two points that are securely mounted. Rear mounting point to be no more than six inches in front of rear axle. No clamps or tie straps. (b) Clutch: Any dry, friction type clutch allowed. No inboard clutches allowed. Clutch must be engaged by centrifugal force only. Active or timed clutch controls are limited to one distinct step. Clutch must exhibit reliable disengagement at engine idle speed. Clutch must be contained by suitable “scatter shield” (engineering data may be required). Clutch assembly must have top covered by .060 inch steel or .125 inch aluminium. (c) Transmission: Any transmission may be used if a transmission is used under rule 1.(a). |
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| 3. Suspension and Brakes | |
| (a) Brakes:
Front and rear hydraulic type brakes are mandatory. Minimum rotor size is 9 inch diameter x .125 inch thickness. Rotors may be drilled only if original minimum diameter and thickness are maintained. (b) Controls: Handlebars must be at least 20 inches overall with grips removed. Handlebar controls must be located in a safe, workable position and mounted in a safe craftsman-like manner. Snap back throttle return mandatory. Handle bar mounted fuel shut off mandatory. Mechanical, cable, pneumatic or electrical actuation permitted. Foot pegs and brake pedal may be rear set. Any brake that can be operated from the legal foot peg location, with the foot on the peg will be permitted. Air shifters permitted. Air shift bottles must be stamped Dot-1800 pound and be securely mounted. No hose clamps or tie straps. (c) Suspension: Front suspension minimum fork diameter 32 mm with a minimum travel of 2 inches. Steering dampener mandatory. Rear suspension not recommended. (d) Wheelie Bars: Wheelie bars are required. Minimum length from centre of rear axle to centre of wheelie bar axle must be at least 79 inches but not exceed 130 inches. Must be securely cross-braced. Mandatory. Minimum specified construction of .75 inch chrome moly and .058 wall thickness. |
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| 4. Frame | |
| (a) Frame:
Any type permitted. Frame material must be 4130 chrome moly. All frames must be mig or tig welded. Main rails must have at least .058 inch wall thickness at least 1 inch diameter. Rake angle must be at least 40 degrees. Frame may be used as an air tank; pressure not to exceed 150 P.S.I.. Some method of checking air pressure is mandatory. (b) Wheelbase: 80 inches minimum length.(c) Ground Clearance: Minimum of two inches with rider on bike and 10 P.S.I. in rear tire (including exhaust). |
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| 5. Wheels and Tires | |
| (a) Wheels:
Front wheel: minimum diameter 16 inches; maximum diameter 19 inches. Rear wheel: minimum diameter 15 inches; maximum diameter 18 inches, bead lock wheel required. (b) Tires: Must be specified for racing use by manufacturer. Automotive tires permitted. Maximum tire width is thirteen (13) inches. Minimum front tire width is (3) inches. |
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| 6. Body | |
| (a) Body:
No body parts are necessary. Seat, tail section and rear fender may be incorporated into one unit. (b) Fenders: Front fender optional. Rear fender must cover the full width of the rear tire and extend behind the rear axle and forward below seat position. (c) Fairing: Recommended. Highly recommended that fairing be mounted solidly to frame tubes. |
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| 7. Electrical | |
| (a) Ignition: Any brand ignition system may be used. No ignitions will be allowed that the timing can be or has to be adjusted with a PC or laptop computer. Retard modules are allowed if they are manually programmed. Any other ignitions must be removed during the event.
(b) Computers: Only data gathering computers are allowed. (c) Starting System: Must be external electric starter; roller or push starts prohibited. Battery covers required for starter cart/vehicle. (d) Control Switches: Must be mounted and constructed in a safe, craftsmanlike manner. (e) Charging System: Optional |
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| 8. Rider | |
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Credentials:
Only CMDRA Licenses will be accepted if you’re running 9.99 or quicker. Application and physician’s physical forms available at the CMDRA office. Valid CMDRA Pro Competition license with fuel endorsement required. (b) Helmet: Full face helmet meeting Snell 00. Must have Snell tag.(c) Protective Clothing: Must have full leathers. Chest Protection mandatory; must meet SFI 46.1 specification. Two piece suits (jacket and pants) must be joined with a zipper at the waist. Must have leather boots/ shoes which cover above ankle. Must have leather gloves. All protective clothing must be in good condition. Full finger leather gloves with knuckle armor and palm reinforcement, one piece or full circumference zippered leather suit with knee, elbow and shoulder armor or reinforcement, spine/back protector and above the ankle leather boots with toe area reinforcement are required. |
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