PRECISION TURBO & ENGINE PRO TURBO

By
XDRL_ICON

Only turbos here in this new and innovative class, and these turbocharged cars will provide plenty of power and excitement!

 

Purse for this class is $17,000/event and broken down as follows:

Winner: $6,000

Runner Up: $2,000

Semi: $1,000

Quarter: $750

Qualifier: $500

DESIGNATION: PT or Pro Turbo followed by car number. PX, Pro Extreme, PM, Pro Mod or Pro Modified not allowed. Numbers must be at least 4” tall and on both side windows, upper left of rear window and upper right of windshield.

 FIELD: 16 car qualified field.

MINIMUM WEIGHT: 

2550 lbs Big Block 4.840-5.300 Bore Space 675 cu in Max.

2350 lbs Small Block 4.500 Bore Space

2200 lbs Small Block 4.400 Bore Space or less

2100 lbs 4 cyl and 6 cyl 214 cu in (3.5L) Max

Weight taken at completion of run with Driver

All rules subject to change at the sole discretion of the X-DRL Technical Services Department.

 

REQUIREMENTS AND SPECIFICATIONS

 BODY APPEARANCE: All vehicles must be professionally finished, painted, lettered, numbered and decaled.

 BODY: Funny car or one piece bodies not allowed even if equipped with doors. Maximum front end overhang of 45” as measured from centerline of front spindles. An X-DRL accepted extension may be used to create 45” overhang if the front end overhang of the original body is less than 45”. All bodies must originate from a documented production vehicle. All new cars must be accepted by the X-DRL Technical Services Department prior to construction.

 DOORS: Required. Doors must be functional and able to be opened from both the inside and outside of the vehicle. Doors may be fabricated from carbon fiber, fiberglass or metal. A metal deflector between the fenders and the leading edge of both doors is required.

FIREWALL: All firewalls must be made of steel or titanium (.024” minimum thickness). Carbon, Aluminum, Magnesium, ect. prohibited.

FLOORS: Replacing stock floors with .024″ steel or .032″ aluminum allowed. Driver’s side floor pan must be .024″ steel and must extend from firewall to the back of the drivers seat and must be welded in place. Carbon fiber or composite materials may not be utilized in any portion of the flooring in the driver’s compartment except for any panel located behind the driver including suspension covers and wheel tubs.

HOOD SCOOP: Maximum one opening only for each turbo inlet. Must be finished and painted to follow the bodies paint scheme.

TAIL LIGHT: Functional rear tail light is required. Minimum 1 tail light required to be operational and controlled from the drivers compartment.

WINDOWS AND WINDSHIELD: .125” minimum polycarbonate materials, such as Lexan MR 4000 or equivilent required. Windows behind the drivers and passenger side windows may be replaced with Carbon Fiber or Fiberglass painted or decaled to simulate windows. An opening with a 4″ diameter minimum is required on side windows adjacent to the driver.

 CHASSIS

BATTERY: Maximum of two batteries allowed. All batteries must be securely sing metal fasteners. Must have an external master mechanical electrical disconnect at the rear of the vehicle marked “PUSH OFF”.

BRAKES: Four wheel brakes with dual master cylinder mounted above frame rails required.

CHASSIS: Must be SFI Spec 25.1E or 25.2 with current NHRA certification tag prior to competition.

DRIVER LOCATION: Must be in conventional left hand drive location.

GROUND CLEARANCE: Minimum of 3” required from front of car to 12” behind front axle centerline. 2” minimum for remainder of car.

STEERING: Stock type steering in conventional location required. Disconnect meeting SFI Spec 42.1required.

SUSPENSION: Race car type suspension required. Solid suspension prohibited. Minimum of 1 hydraulic shock absorber required on each wheel.

TIRES: Slicks permitted. Must be automotive type designed for racing. All tires must have manufacturer, model and or part number and size information clearly and permanently designated on sidewall.

WHEEL BASE: Minimum 100″, Maximum 115″. Bodies derived from a Ranger, Dakota, or S-10 Maximum 125”. Maximum variation is 2” side to side.

WHEELIE BARS: Required, Must have non metallic wheels.

WHEELS: Wheels meeting SFI Spec 15.1 required. Inner Liners accepted. Maximum rear wheel width 16” measured between the inner and outer tire mounting surfaces. Use of a liner mandatory on all non bead lock wheels.

 DRIVELINE AND ENGINE

CYLINDER BORE SPACING: Maximum Bore Spacing is 5.300” .

MAXIMUM CUBIC INCH ENGINE DISPLACEMENT: 675 cubic inch maximum.

TURBOCHARGER: Single turbocharger limited to 4.788” (121.62mm) maximum; twin turbocharger limited to 3.932” (99.87mm) maximum. Turbochargers must meet SFI Spec 61.1. Air-to-air or water-to-air intercoolers permitted on turbocharged vehicles. Turbocharger size will be verified by measuring the housing bore at the leading edge of the impeller wheel. The maximum diameter of the housing bore at the leading edge of the wheel may not exceed  more than the maximum  allowable turbocharger size permitted.

CLUTCH/FLYWHEEL: Flywheel and clutch meeting SFI Spec 1.3, 1.4, or 1.5 certification required. SFI Spec 29.2 flexplate required on all torque converter equipped cars.

DRIVELINE: A full 360 degree drive shaft tube is required over yoke, extended a minimum of 12” required from transmission tail shaft. Minimum thickness of tube housing is .050” chrome-moly or titanium. Two piece units accepted with a minimum of 6 attachment points using 3/8” grade 8 bolts. SFI Spec 43.1 driveshaft required.

ENGINE CONTAINMENT SYSTEM: SFI Spec 7.1 lower engine containment system required. If a flexible 7.1 system is utilized, it must be supported by a belly pan made from carbon fiber or .032” aluminum with a minimum 2” vertical lip.

ENGINE SETBACK: Maximum of 10% of total vehicle wheel base as measured from the centerline of the forward  front spindle to center of front spark plug hole.

EXHAUST: Open conventional style headers required. Exhaust gasses must be directed out of the body and away from the driver and fuel system.

HARMONIC BALANCER: SFI Spec 18.1 certification required.

FLYWHEEL SHIELD: SFI Spec 6.3 certification required. 

FUEL: Alcohol, gasoline, and methanol allowed. The use of nitromethane prohibited.

IGNITION: One spark plug per cylinder maximum allowed.

INTAKE MANIFOLD: SFI Spec 23.1 Burst Panel  or X-DRL approved burst device required.

NITROUS OXIDE: Allowed in vehicle using Alcohol or Gasoline.

REAR END: Automotive type, Full-floater rear end required. Titanium and or Aluminum Wheel studs prohibited.

STARTER: Required, Must be self starting.

TRANSMISSION: Any type allowed. All entries must utilize a one piece transmission shield meeting SFI Spec 4.1.

 MISCELLANEOUS

CREDENTIALS: A valid X-DRL membership X-DRL, NHRA, or IHRA Competition License is required to compete. Valid IHRA or NHRA competition licenses may be transferred when presented with a current physical.

DATA / ELECTRONICS ACQUISITION: Allowed.

STARTING LINE ENGINE CONTROL DEVICES: Allowed.

TOW VEHICLES: Allowed. A valid driver’s license is required to operate any type of tow vehicle. All passengers must be seated inside of vehicle with all doors closed. Riding in open hatchback, trunk or cargo area not allowed. ATV’s are allowed with a maximum of one passenger who must be seated at all times. Golf carts are allowed with a maximum of three passengers who must be seated at all times. Posted pit speeds must be obeyed at all times. If pit speed is not posted, maximum pit speed will be 10 mph. 

SAFETY EQUIPMENT

DRIVER RESTRAINT SYSTEM: SFI Spec 16.1 certification required. 7 point system recommended.

FIRE SYSTEM: SFI Spec 17.1 system required. System must contain a minimum of 20 lbs of fire suppression agent. One nozzle required inside driver’s compartment must be directed at driver’s feet. Two or more nozzles must be directed at front of engine and fuel cell. FIre suppression system must be released with a single actuation (i.e. single handle, button or lever).

HEAD AND NECK RESTRAINT: SFI Spec 38.1 required. An aluminum skid plate is recommended above driver’s head.

HELMET: SN-2000 or newer of SFI Spec 31.2 or 41.2 required. Use of open face helmet prohibited. Eject Helmet Removal System (Part #SDR 890-01-30) or equivalent required.

MASTER ELECTRICAL CUTOFF: Required. Must be clearly labeled “PUSH OFF”.

PARACHUTES: Dual parachutes required. Separate shroud-line mounting points with 1/2” sleeved grade 8 bolts required.

PROTECTIVE CLOTHING: A driver’s suit meeting SFI Spec 3.2A/20, gloves meeting SFI Spec 3.3/20, shoes meeting SFI Spec 3.3/20 and a head sock meeting SFI 3.3 required. A head sock is not required when a helmet manufactured with a skirt meeting SFI Spec 3.3 is used.

RF SHUTDOWN RECEIVER: Properly functioning Electrimotion shutoff device (PN: RF001PS or combination PN: SB001 and RF001) required.

ROLL BAR PADDING: SFI Spec 45.1 required.

UPHOLSTERY: Driver’s seat foamed with energy absorbing material, formed for the driver and covered with flame retardant material is required. “Wrap Around” type seat or fiberglass/carbon fiber one-piece bucket accepted seat frame of chrome-moly tubing must be installed as a permanent part of the chassis. Lateral Helmet supports required.

WINDOW NET: SFI Spec 27.1 required.

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