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Originally Posted by knighty
interestibng stuff bob - I calculate 302ci as 4948cc........if they are producing 640bhp thats 128bhp per litre - quite a highly strung motor for a 2-valve per cylinder........which still makes me think a 6.0 LMP1 V8 2-valve motor will produce the beans.........with 470 lb/ft torque I would be interested to know the bore and stroke - seems quite low - I would suspect the stroke is shorter than the bore diameter.......
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Knighty you wil get more then that.
The Speed World Challange Corvettes use a LS2 6 liter block. 550+ BHP without restrictor and 525 ft tq. a few notes: 2000-7000 rpm range
Cam is the GM- Cup cam with 239/251 570/570 106 lsa
Here are some details:
2.A.1. OEM Engine Designation: LS-2
2.A.2.Displacement (Max): 6026cc (368ci) 2.A.3. Number of Cylinders: 8 (V-block)
2.A.4. Rev-Limit: Required: (Y / N) Yes 2.A.5. @ RPM See Appendix A 2.A.6. Method: Fuel Cut
2.A.7. Compression Ratio (Max): 12.0:1 2.A.8. Piston Stroke (Max): 92.08mm
2.A.9. Restrictors – (teams are required to be
prepared to install these restrictors):
% of
Reduction:
20, 25, 30, 35, 40
Hole Diameter
(mm): 80.5, 77.9, 75.3, 72.6, 69.7
2.A.10. Cylinder Firing Order: 1-8-7-2-6-5-4-3
2.A.11. Direction of Engine Rotation (incl. cams): Clockwise
B. CYLINDER BLOCK: Part Number: 12568950 (casting#: 12568952)
2.B.1. Cylinder Block Material: Cast Aluminum
2.B.2. Cylinder Bore (Max): 102.1mm *Note: Includes any allowed overbore, usually 1mm over stock.
C. CYLINDER HEAD: Part Number: LS6: 88958622 (casting#: 12564243), LS2: 88958765 (casting#: 12564243)
2.C.1. Cylinder Head Material: Cast Aluminum
D. VALVE SYSTEM:
2.D.1. Number of Valves per Cylinder: 2.D.1.a. Intake: 1 2.D.1.b. Exhaust: 1
2.D.2. Valve Head Diameter (Max): 2.D.2.a. Intake: 50.8mm 2.D.2.b. Exhaust: 39.4mm
E. INTAKE PORT DIMENSIONS:
2.E.1. At Inlet Manifold Face (Stock): 2.E.1.a. Height: 82.8mm 2.E.1.b. Width: 29.2mm
2.E.2. Intake Port Work Allowed (Yes or No): No 2.E.2.a. Depth from Face: n/a
F. EXHAUST PORT DIMENSIONS:
2.F.1. At Exhaust Manifold Face (Stock): 2.F.1.a. Height: 33.8mm 2.F.1.b.Width: 41.7mm
2.F.2. Exhaust Port Work Allowed (Yes or No): No 2.F.2.a. Depth from Face: n/a
Source:
http://www.world-challenge.com/competitors/vts.php
Look under Chevrolet C6 Corvette Z06 or Cadillac CTS-V
Both use the LS2 motor not the 7 liter LS7 for Speed World Challange