class11

CLASS 11
A limited 4 wheeled vehicle utilizing VW Type 1 stock components with a 1585cc engine and run with one persons during race.
All parts are to be stock Type 1. No parts replacement or modification of parts is allowed unless specifically stated in this document.

ALL ACR�S APPLY

FRONT END SUSPENSION
ALLOWED:
1. Type one VW suspension only. Stock Type 1 beam width (34 3/16�) is mandatory.
2. Front axle torsion tubes may be cut, rotated and re-welded to increase ground clearance.
3. Filling of speedometer hole.
4. Ball joints or king pins.
5. Spindles may be reinforced but outside diameter of bearing cannot be changed.
6. Stock torsion bars only.
7. Front snubbers of any manufacturer but stock dimensions and mounting methods must be maintained.
8. Limiters on ball joint ends.
9. Reinforcement of stock front arms by addition of material only.
NOT ALLOWED:
1. Torsion adjusters.

REAR SUSPENSION
ALLOWED:
1. Type 1 IRS or swing axle only. Rear suspension track width must not exceed 51� from backing plate flange to backing plate flange at ride height.
2. Strengthening of IRS swing arms as long as stock working measurements are maintained. Stock dimensions: Center of rear torsion tube and center of rear stub axle (16.25�) must be held. Trailing arm bumpers may be removed.
3. Torsion bars, tubes and axles must be stock.
4. Spring plates stock only.
5. Rear torsion tubes may be strengthened. Type 1 stock width is 40.5�.
6. Rear torsion housing may be additionally supported only by the attachment of a terminal end (support member) of roll cage.
7. Torsion bar snubbers of any manufacturer but must be stock dimensions.
NOT ALLOWED:
1. Secondary suspension.     See ACR 45.
2. Rear torsion adjusters.

WHEEL BASE
Open.

SHOCK ABSORBERS
ALLOWED:
1. One per wheel.
2. Stock front mounts must be used.
3. Rear shocks may be any size and in any location.
4. Cooling fins.
5. Mounting bolts may be changed to a maximum of �� diameter.
NOT ALLOWED:
1. Air or coil shocks.     See ACR 45.
2. Remote reservoir.

WHEEL AND TIRES
D.O.T. only.     See ACR 5
ALLOWED:
1. Any stock Type 1 wheel or any manufacturer 15� steel wheel may be used.
2. Removal of hub cap clips.
3. Centers may be welded and safety beads may be added. Beads must be round stock.
4. Studs may replace bolts.
5. Tire size optional but must be D.O.T..     See ACR 5.
NOT ALLOWED:
1. Wheel adapters.
2. Bead locks.

STEERING
ALLOWED:
1. Chromoly tie rods or any metal material.
2. Tie rods must be one (1) piece only.
3. Tie rod ends - maximum size - small Ford.
REQUIRED:
1. Rack and pinion.
NOT ALLOWED:
1. Modified stock tie rods (i.e.: cutting, plunging, shimmying and rewelding etc.).

BRAKES
ALLOWED:
1. VW Type 1 drum only.
2. Any combination of VW master and wheel cylinders as long as stock dimensions ore maintained.
3. Any mechanical steering brake.

FUEL
See ACR 13.

FUEL CELL MANDATORY
See ACR 14.

IGNITION
See ACR 9.
The use of a distributor in the stock location (i.e., Type I VW Case) is mandatory. Distributor and coils of any origin and/or manufacturer are allowed. Capacitive ignition or pointless systems are allowed, but ignition (spark) must be activated off the distributor shaft through the rotor and cap to the spark plugs.

ALLOWED:
1. Battery 6 or 12 volts.
2. Any manufacturer distributor.
3. Any VW type alternator or generator in stock location.     See ACR 23.
NOT ALLOWED:
1. Magnetos and direct fire and multiple coil ignition systems.     See ACR 9.

ENGINE
The engine must be VW Type 1-1600 (U.S. Model Sedan components and dimensions) as delivered from the factory. Maximum engine displacement is 1585cc. (85.5mm diameter x 69mm stroke).

CASE
ALLOWED:
1. Any type 1, 2, 3, or �universal� can be used.
2. Align bore.
3. Drilled and taped for oil pressure an/or temperature sending units.
4. Crank pulley seal. Machining only if necessary for installation.
5. Case savers.
6. Searing surfaces for cylinders may be machined but must be shimmied back to original stock deck height of .039 or 1mm minimum. No maximum.
7. Oil galleries on early cases may be enlarged to that of the universal case. (10mm).
8. Oil gallery plugs may be threaded.
9. Any oil bypass pistons and springs.
10. Windage trays.
NOT ALLOWED:
1. Deep or dry sumps.
2. Sump alterations.
3. Any other modifications.

BEARINGS
Any manufacturer as long as stock dimensions are maintained.

PISTON ALLEMBLIES AND CYLINDERS
ALLOWED:
1. Any manufacturer but stock dimensions have to be maintained. (85.5mm).
2. Three ring pistons only.
3. Wrist pin retainers may be of any type.
4. Balancing piston assemblies. One assembly must be left untouched. The rest can be balanced to the weight of the one untouched. Piston weights balanced minimum 390 to 410 grams (pistons only).
NOT ALLOWED:
1. Slipper skirts.
2. Notched pistons.
3. Dome or dashed pistons.
4. Machining top of piston.

RODS
ALLOWED:
1. VW #311 �B� rods only. 5.395� plus (+) or minus (-) .010. Measured from center of small end to centerline of large end.
2. Balancing.
3. One must remain untouched.
NOT ALLOWED:
1. VW �A� rods.
2. VW rods from 1300 - 1500 cc. These rods will be identified by bolts rather than the pressed studs.
3. Polishing and profiling.

CAMSHAFT AND CAMSHAFT GEAR
ALLOWED:
1. Reground cam shafts to specifications supplied.
2. Any degree of cam advance or retard.
NOT ALLOWED:
1. Bolt on gears.
2. Adjustable gears.
3. Offset of crank and cam gears.
CAM SPECS: Plus or minus .002.

INTAKE
OPEN    CLOSE    LIFT
15 degrees BTC   52 degrees ABC   .020
2 degrees BTC   32 degrees ABC   .050
14 degrees ATC   16 degrees ABC   .100
Maximum lift .304

EXHAUST
OPEN    CLOSE    LIFT
55 degrees BBC   16 degrees ATC   .020
38 degrees BBC   1 degree BTC   .050
21 degrees BBC   17 degrees BTC   .100
Maximum lift .289

OIL PUMPS
Any manufacturer.

CRANKSHAFT
ALLOWED:
1. Stock VW Type 1600 only. (69mm).
2. Power pulley.
3. Sand seals.
4. .030� undersized.
5. Balancing.
NOT ALLOWED:
1. Polishing or lightening.
2. Offset grinding.

CLUTCH AND PRESSURE PLATE
ALLOWED:
1. Any manufacturer stock diameter only.
2. Balancing.

FLYWHEEL
ALLOWED:
1. Stock VW Type 1 design only.
2. Lightening and balancing.
3. Stock diameter only.
4. Eight dowel pinned.
5. Any gland nut and washer.

HEADS
ALLOWED:
1. U.S. Sedan stock single port or equivalent only.
2. May be flycut for cleanup but must retain 44cc combustion chamber.
3. Three angle valve seats (15-45-75 degrees).
NOT ALLOWED:
1. Polishing or porting.
2. Combustion chamber shape inner surfaces can be neither changed nor touched.

VALVES
ALLOWED:
1. Stock one or two piece valve with stick profile.
2. Single 45 degree angle.
3. Guide may be bronze, cast iron or steel.
4. Valve guide seal.
5. Any manufacturer of valve springs, springs retainers and lifters.
6. Stock valve spring diameter in the heads must be maintained.
7. Valve stem lash caps.
8. Valves: Intake 35.5mm maximum.
Exhaust 32.0mm maximum.
NOT ALLOWED:
1. Grinding, polishing or porting in any including valves port areas and guides.
2. Titanium valves.
3. Swirl polish.
4. One piece stainless steel valve.
5. Valves with larger heads that stock.

ROCKER ARM SHAFT
ALLOWED:
1. Any which permit use of standard stock (1600cc) VW rocker arms.

ROCKER ARMS
ALLOWED:
1. Stock 1600cc VW rocker arms only.
2. Any manufacturer push rods and tubes.
3. Rocker arm adjustment screws may be of any manufacturer.
4. Rocker arm clips may be wire tied.
5. Resurfacing to permit the use of swivel feet or similar devices.
6. Valve covers of any manufacturer.
NOT ALLOWED:
1. Other grinding except the mentioned.
2. Roller or needle bearings either as part of the shaft or interfacing between the rocker arms and the shaft.

CARBURETOR
ALLOWED:
1. Stock VW 30 Pict 1, 2, and 3.
2. Maximum venturi size 24.10mm.
3. Removal of automatic choke housing, choke plate and shaft.
4. Electric needle valves optional.
5. Stock float bowl vent may be moved or plugged. External float bowl vent allowed.
6. Any air and main jet.
7. Stock fuel pump only.
8. Air cleaner any manufacturer or location.
9. Any filter or pressure regulator.
NOT ALLOWED:
1. One carburetor listed as PIC 30. This carburetor has no choke housing and no numbers, it is illegal.
2. Welding or bonding of velocity stacks to carburetor.
3. Internal modifications.
4. Removal of parts from throat area.
5. Polishing or filing.
6. Chemical milling.

RESTRICTOR PLATES
ALLOWED:
1. GPORRA approved restrictor plate only.
2. Size 19.5mm or .768.
3. Must be .375� thick.

INTAKE MANIFOLD
ALLOWED:
1. Stock single port only.
2. Heater tube removal.
NOT ALLOWED:
1. Modifications.
2. Chemical milling.
3. Cutting of manifold.

FAN SHROUD
Stock only.

TRANSMISSION
ALLOWED:
1. Stock VW Type 1 Bug only. Model AH and AT.
2. AH - 8:33 ring and pinion (4.125 ratio) and stock gears must be retained.
3. AT - 8.31 ring and pinion (3.875 ratio) and stock gears must be retained.
4. Only gear ratio stated herein.

    AH AT
1st gear ratio 3.780 3.780
2nd gear ratio 2.059 2.059
3rd gear ratio 1.260 1.260
4th gear ratio .890 .930
Ratio of engine revolutions to wheel travel have been worked out and will be checked.
5. Rear transaxle mounts may be additionally supported.
6. Any manufacturer shifting lever.
NOT ALLOWED:
1. Any modifications.
2. Heavy duty side plates or Beef-A-Dif.
3. Axle overtubes.
4. Close ratio gears.

OIL COOLERS
ALLOWED;
1. Any manufacturer full flow system.
2. Location optional.
3. Late model housing.
NOT ALLOWED:
1. Deep or dry sump.

WEIGHT
ALLOWED:
1. Single sear minimum 1450 pounds - Class 11
2. There are wet weights.   See ACR 33.
3. Ballasts to make weight if needed. If this is used a 1/8� hole for wiring the ballast to the frame so as to make removal impossible is mandatory.

BUMPERS
Adequate for safety front and rear. See ACR 35.