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PART 1 - GT1
SOURCE STATUS SECTION DESCRIPTION
TB 98-03 Eff 3/1/98 D.4.b.2 Change the sequential transmission
weight penalty to 75 lbs.
TB 98-07 Eff 7/1/98 D.8.a.1.E Add paragraph as follows: Convertible
and removable tops and all attaching
hardware shall be removed from open
cars.
TB 98-05 Eff 5/1/98 GT1 p 33 1997 Chevrolet Corvette. Correct model
years to 1997-.
TB 98-02 Eff 2/1/98 GT1 Classify Acura NCX (3.0L / 3.2L).
Induction: multiple carburetors or
original fuel injection, Weight: 1880
lbs.
TB 98-07 Eff 7/1/98 GT1 Classify Ferrari 308. Induction:
multiple carburetors or fuel injection.
Note: Engine may be located
longitudinally with suitable transaxle.
TB 98-02 Eff 2/1/98 GT1 Classify Triumph TR-8. Weight: 2150
lbs.
PART 2 - GT2-5
SOURCE STATUS SECTION DESCRIPTION
TB 98-07 Eff 7/1/98 F.4.a.4 Add to the end of the paragraph as
follows: Convertible and removable
tops and all attaching hardware shall
be removed from open cars.
TB 98-04 Eff 4/1/98 F.4.b.9 Delete first two sentences and replace
with the following: Fenders may be
flared for tire clearance, provided
their shape and opening contour, in the
horizontal projection, is similar and
proportional to the original opening
and does not obscure the view of the
tire.
TB 98-03 Eff 3/1/98 F.4.e.11 Change the sequential transmission
weight penalty to 75 lbs.
TB 98-07 Eff 7/1/98 F.4.j.6 Add to the end of the paragraph as
follows: Carbon brake rotors are
prohibited.
TB 98-03 Eff 3/1/98 GT2 p 55 Mazda RX-7 (12A peripheral port).
Decrease weight to 2080 lbs.
TB 98-03 Eff 3/1/98 GT2 p 55 Mazda RX-7 (13B). Decrease weight to
2180 lbs.
TB 98-01 Eff 1/1/98 GT2 p 56 Pontiac Fiero 2.5L. Reduce weight on
2.5L engine to 1930 lbs and reduce
weight on 2.7L engine to 2080 lbs.
TB 98-02 Eff 2/1/98 GT2 p 57 1969- Porsche 911 T, E, S Coupe and
Targa. Change Carburetion to read: Two
(2) automotive type with 46mm venturis.
TB 98-03 Eff 3/1/98 GT2 p 57 1969- Porsche 911 T, E, S Coupe and
Targa. Correct designation to 1968-
Porsche 911 Coupe and Targa.
TB 98-02 Eff 2/1/98 GT2 p 57 1969- Porsche 914-6. Change
Carburetion to read: Two (2) automotive
type with 46mm venturis.
TB 98-03 Eff 3/1/98 GT2 Classify Acura NSX.
- Carburetion: automotive type
carburetors with 36mm venturis
- Weight: 2380 lbs
TB 98-07 Eff 7/1/98 GT2 Classify Pontiac Grand Am.
- Engine: 4 cyl OHV
- Bore: 101.6mm 101.6mm
- Stoke: 76.2mm 82.6mm
- Displacement: 2471cc 2679cc
- Number of valves per cylinder: 2
- Port configuration: Crossflow
- Head Material: Aluminum
- Carburetion: Two (2) automotive type
with 48mm venturis
- Weight:
- Wheelbase:
- Track:
- Wheels:
- Alternate Specifications:
TB 98-02 Eff 2/1/98 GT3 p 59 1992- BMW 318 Coupe. Correct
Carburetion as follows: Two (2) 45mm
with 45mm venturis.
TB 98-06 Eff 6/1/98 GT3 p 63 Nissan / Datsun PL510. Add to Bore /
Stroke: 85mm x 86mm; add to
Displacement: 1952cc; change
Carburetion to read: 1952cc = 50mm
w/50mm venturis, 1770cc = unrestricted;
change Weight to read: 1770cc = 1880
lbs, 1952cc = 2030 lbs.
TB 98-03 Eff 3/1/98 GT3 p 64 1969- Porsche 911 L, S, T Coupe and
Targa. Correct designation to 1968-
Porsche 911 Coupe and Targa.
TB 98-03 Eff 3/1/98 GT3 p 64 Porsche 914 S. Reduce weight to 1880
lbs.
TB 98-05 Eff 5/1/98 GT3 p 65 1992- Toyota Paseo. Correct weight to
1980 lbs.
TB 98-06 Eff 6/1/98 GT3 p 65 1992- Toyota Paseo. Correct weight to
2030 lbs.
TB 98-04 Eff 4/1/98 GT3 p 65 Volkswagen Corrado 8V. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-05 Eff 5/1/98 GT3 p 65 Volkswagen Golf & GT1. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-05 Eff 5/1/98 GT3 p 66 Volkswagen Jetta. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-05 Eff 5/1/98 GT3 p 66 1975-1984 Volkswagen Rabbit. Add to
Notes: Alternate Eurospec cylinder
heads may be used.
TB 98-05 Eff 5/1/98 GT3 p 66 Volkswagen Scirocco. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-06 Eff 6/1/98 GT3 Classify Porsche Boxster.
- Engine: 4 cyl OHV, 6 cyl OHV
- Bore: 94.0mm, 80.0mm
- Stoke: 70.9mm, 66.0mm
- Displacement: 1968cc, 1991cc
- Number of valves per cylinder: 2
- Port configuration: Crossflow
- Head Material: Aluminum
- Carburetion (4 Cyl): Solex 40P11,
Weber 40 IDF, Dellorto 40 DLRA
- Carburetion (6 Cyl): (2) 40 IDA/IDS
3C, (6) Solex 40 P1
- Weight 4 (Cyl): 1980 lbs
- Weight (6 Cyl): 2080 lbs
- Wheelbase: 96.5"
- Track: 60" (max)
- Wheels: 13" x 7", 14" x 7", 15" x 7"
- Notes (4 Cyl): Intake manifold P/N
021-129-705R; Sleeves: Cast iron.
- Notes: (6 Cyl): Dual plug heads
prohibited; Alternate cylinder head:
P/N 911-104-302-OR (w/sealed injector
port).
- Notes: Windshield may be removed and
low front hoop roll cage may be
fitted.
TB 98-01 Eff 1/1/98 GT4 p 69 1988-1991 Honda Civic CRX 1.5. Reduce
venturi size on alternate 1590cc 4
valve engine to 30mm.
TB 98-05 Eff 5/1/98 GT4 p 72 Volkswagen Corrado. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-05 Eff 5/1/98 GT4 p 72 Volkswagen Golf. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-05 Eff 5/1/98 GT4 p 72 1975- Volkswagen Rabbit. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-06 Eff 6/1/98 GT4 p 72 1975- Volkswagen Rabbit. Add to Notes:
Alternate cylinder heads: P/N 026-103-
373G and P/N 049-103-351C.
TB 98-05 Eff 5/1/98 GT4 p 72 Volkswagen Scirocco. Add to Notes:
Alternate Eurospec cylinder heads may
be used.
TB 98-02 Eff 2/1/98 GT4 Classify 1984-1987 Honda Civic 4-door.
Same specifications as Honda Civic HB.
Add to Notes: Rear fender flares may
extend forward into the rear doors no
more than 26 inches from the rear axle
center line.
TB 98-05 Eff 5/1/98 GT4 1984-1987 Honda Civic 4-door. Correct
specifications as follows: Wheelbase:
96.5"
TB 98-01 Eff 1/1/98 GT5 p 74 Alfa Romeo Giulia 1300/130TI. Reduce
weight to 1740 lbs.
TB 98-07 Eff 7/1/98 GT5 p 74 Alfa Romeo Giulia 1300/130TI. Add
alternate AR116 engine.
- Engine: 4 cyl DOHC
- Bore: 80.0mm
- Stroke: 67.5mm
- Displacement: 1357cc
TB 98-06 Eff 6/1/98 GT5 Classify 1988-1991 Honda Civic HB
- Engine: 4 cyl OHC
- Bore: 74.0mm
- Stoke: 78.0mm
- Displacement: 1342cc
- Number of valves per cylinder: 3
- Port configuration: Crossflow
- Head Material: Aluminum
- Carburetion: Unrestricted
- Weight: 1870 lbs
- Wheelbase: 98.4"
- Track: 60" (max)
- Wheels: 13" x 6"
- Notes: Cylinder head P/N 12100-PE3-
000 or 12100-PE7-000
TB 98-03 Eff 3/1/98 GT5 Classify 1988-1991 Honda CRX.
- Engine:
- Bore: 74.0mm
- Stoke: 78.0mm
- Displacement: 1342cc
- Number of valves per cylinder: 3
- Port configuration: Crossflow
- Head Material: Aluminum
- Carburetion: Unrestricted
- Weight: 1870 lbs
- Wheelbase: 90.6"
- Track: 60"
- Wheels: 13" x 6"
- Notes: Cylinder head P/N 12100-PE3-
000 or 12100-PE7-000
TB 98-03 Eff 3/1/98 GT5 Classify Renault R5 (R-1228).
- Engine: 4 cyl, OHV
- Bore: 73.0mm
- Stoke: 77.0mm
- Displacement: 1289cc
- Number of valves per cylinder: 2
- Port configuration: Non-crossflow
- Head Material: Aluminum
- Carburetion: Unrestricted (32mm
venturis w/alternate cylinder head)
- Weight: 1800 lbs
- Wheelbase: 94.6"
- Track: 60"
- Wheels: 13" x 6"
- Notes: Alternate cylinder head P/N
77005697627. Alternate 1397cc
engine: Bore: 76.0mm, Stroke: 77.0mm,
Carburetion: 45mm, Weight: 1900 lbs,
Alternate cylinder head P/N
77005697627.