For 2.6 class most organization's follow PPL rules. For Work/stock 2.5 class it becomes alot more difficult and you need to decide if your going to stick to a factory turbo no modifications, factory modified turbo or aftermarket 2.5 turbo. There are 2.5 turbos that can make close to 1000hp now.
And the biggest problem I see is that the organization's have rules, but do not enforce them good enough!!!
Here is a copy of our local W/S rules for a stock turbo:
Work Stock Class Rules
Work Stock
The Work Stock (WS) class is designed for daily-driven, on the road pickup trucks (full-bodied
diesel pickup trucks). Valid DOT registration and license plates are mandatory. The vehicle may
be two or four-wheel drive.
Weight breaks: 8500 lbs. Weight is with driver
General Safety: A fire jacket and helmet are recommended. Vehicles are recommended to have a rain cap or guillotine style air shut-off that can be operated by the sled.
REGULATIONS:
Ballast: Ballast is permitted. Hanging front weights are prohibited. Ballast may be added in the
bed of the truck. If used, ballast must be securely fastened to the bed.
Batteries: The batteries must be securely mounted. They may not be located in the driver
compartment or forward of the radiator core support.
Body: The body must be the OEM truck body, including the full bed floor. The body must retain
full sheet metal. Metal and fiberglass after-market hoods only are permitted. The hood must be closed and securely latched while the vehicle is hooked to the sled. The complete OEM
firewall and OEM floor pan is mandatory.
Brakes: Four-wheel hydraulic brakes are mandatory.
Chassis: The OEM chassis is mandatory. The engine must be in the OEM location for the body
used. The vehicle must retain the full OEM chassis. Wheel tubs, back-half conversions, tube
chassis, etc., are prohibited.
Cooling System: Radiators must be in the stock location and be of at least stock size.
Credentials: All drivers must have a valid state driver’s license.
Driveline: An OEM transmission and transfer case are mandatory. They must have been an
option on a one-ton or smaller pickup.
Driver Restraint System: The OEM restraint system is mandatory and must be worn.
Engine: The engine is limited to a stock-appearing, compression ignition
Engine. Engines of different makes may be interchanged as long as they were an option on a 1-ton or less truck. The injection pump and turbo must remain engine make specific as described in the rules.
Exhaust: Vehicles are recommended to be equipped to direct exhaust upward. The exhaust must exit rearward of the driver’s compartment. Stacks exiting through the hood or fender well are prohibited. If the muffler or catalytic converter have been changed from stock, two 3/8 inch diameter, minimum grade 5, bolts must be installed through the exhaust pipe in a cross pattern within one inch of each other as close to the turbo as is practical.
Fire Extinguisher System: A fire extinguisher is recommended. A fire extinguisher system is
permitted.
Fuel: The fuel must be pump #1/#2 diesel only. Soy/Bio-diesel fuel is permitted. Off-road diesel
fuel is prohibited. NITROUS OXIDE is prohibited along with other oxygen extenders as
well as the use of PROPANE is also prohibited. All system components MUST be removed from the truck.
Fuel Injection Pump: The fuel injection pump is limited to a stock-appearing, OEM engine
model-specific pump only. The use of multiple high-pressure common-rail fuel pumps is
prohibited. Powerstroke engines with a single factory turbo may utilize a second HPOP. Pumps
from different years in the same engine model may be interchanged.
Fuel System: The OEM fuel tank is mandatory and must be used. Racing fuel cells are prohibited and must be removed from the vehicle. Aftermarket lift pumps are permitted.
Harmonic Balancer: All engines turning > 4500 RPM must be equipped with a
harmonic balancer or damper meeting SFI Spec 18.1.
Hitch: The hitch must be a towing receiver-style hitch; reinforcements are permitted. Reinforcements must not extend forward of the centerline of the rear axle or to the axle housing itself. Trick hitches are prohibited. The hooking point must be the rear-most point on the vehicle and must be rearward of the stock location of the tailgate. The hooking point must be at least 28% of the vehicle wheelbase in length from the centerline of the rear axle. The hitch must be parallel to the ground. Bumpers may be notched or removed. The hitch’s height from the ground may not exceed 26 inches on 4wd units and 30 inches on 2wd units. The hooking point must have a minimum 3.750-inch inside diameter opening for the sled hook. The hooking point will be measured to the center of the clevis loop. The clevis loop must face the ground and not sideways.
Intercoolers: Aftermarket air to air intercoolers are permitted as long as they remain in the stock location. Air to water or any other intercooler type is prohibited.
Interior: A complete interior, including dashboard, door panels, headliner, etc., is mandatory.
Two matching front seats are mandatory. Aftermarket seats are permitted; they must be fully
upholstered. All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained
and be operative. The use of hand-throttle controls is prohibited.
Rear End: Non-OEM rear-end housings are prohibited. It must have been an option on a one-ton or smaller pick up. Rear axle bolts must be covered by a cap or shield.
Steering: The vehicle must retain the full, original OEM steering gear. The vehicle must retain
the original OEM power steering assistance, if it was so equipped. Additional stabilizers are
permitted. Non-OEM power assist methods are prohibited.
Street Equipment: Complete headlight and taillight assemblies (all) are mandatory and must be operative. Complete OEM windshield and windows are mandatory. Windows must be operative per factory specifications; that is, they must open and close via OEM electrical or mechanical means.
Suspension, Front: The upper mounting point for strut assemblies must be in the factory
location. Adjustable caster/camber pillow ball mounts are permitted. The lower control arm may
be strengthened provided factory-mounting points to chassis are maintained. The lower mounting point for the strut assembly may be modified for improved caster or camber. Strut tower braces, lower tie bars, and sway bars are permitted. Non-OEM limit straps, traction bars and devices are prohibited.
Suspension, Rear: An OEM-style suspension is mandatory. Lowering or raising the vehicle
height with suspension modifications is permitted. Traction bars and devices are permitted; they must be bolt-on only; welds are permitted for attachment to frame or axle housing. All OEM suspension mounting points must be retained and used. Non-OEM sway bars, limit straps, and camber kits are prohibited. The rear suspension must maintain a minimum compression shock travel of one inch; clamping, limiting, or blocking of the suspension is prohibited. All rear suspensions must use at least one working shock absorber per wheel. Airbag spring assistance is permitted; airbag compressors must be disconnected and airbags must be at 0 psi. If a truck is equipped with airbags a valve stem must be accessible to measure air pressure.
Tires: The tires must be DOT street tires. Cut tires are prohibited.
Tow Vehicles: Tow vehicles are prohibited.
Transfer Case: Non-OEM transfer cases are prohibited. The transfer case must have been an
option on a one-ton or smaller pickup truck.
Transmission, Automatic: Non-OEM transmissions are prohibited. Aftermarket torque
converters, valve bodies and internal components are permitted. Transmission brakes are
prohibited. Any non-OEM floor-mounted automatic transmission shifter must be equipped with a
spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put
into reverse gear. A functional neutral safety switch is mandatory. All transmission lines must be
metallic or high-pressure-type hose. All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a transmission shield meeting SFI Spec 4.1 and must be labeled accordingly. A blanket-type shield is permitted; it must be appropriately labeled as meeting SFI Spec 4.1 and it must extend from the rear of the block to the front of tail housing with a minimum six inch overlap where it is fastened. All non-blanket type shields must incorporate two (or one, per manufacturer’s instructions) 3/4 inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is labeled as meeting SFI Spec 4.1. All vehicles with engines running 4500RPM or more and using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1.
Transmission, Manual: Non-OEM transmissions are prohibited. Aftermarket internal
components are permitted. A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on
all vehicles with engines running 4500 RPM or more. All manual transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles with engines running 4500 RPM or more and equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater. Applications for which an SFI Spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell housing; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened.
Turbocharger: The turbocharger is limited to a single stock, OEM/Factory make-specific
charger only. Turbochargers from different years in the same engine make may be interchanged, no adapters to accept other model turbo. 6.4 liter Powerstroke engines may utilize the factory twin turbo configuration. Modifications to the stock compressor housing, compressor wheel, exhaust housing or exhaust wheel are prohibited. Any cutting, notching or etc. of the turbo wheels / blades will result in a disqualification. Turbo housing must be unaltered OEM/ Factory with no provision made for extra air flow and/or machining to allow larger turbo wheel in the housing. No bushing of the inducer is permitted.
Water Injection: Water injection is prohibited. All system components must be removed from
the truck.
Wheelbase: The vehicle must retain the original factory wheelbase and track width.
