By The Numbers
402ci Chevy SB2.2
Block: Chevrolet Performance
Bore: 4.128
Stroke: 3.75
CID: 402
Compression Ratio: 15:1
Crankshaft: Lunati
Camshaft: COMP Cams, solid-roller
Timing Chain: Jesel beltdrive
Lifters: Jesel .937-inch keyway
Pushrods: custom Smith Brothers
Springs: Manley
Installed height: 2.150 inches
Spring load, closed: 250 pounds
Spring load, open: 600 pounds
Retainer: Del West Super 7 Titanium
Valve locks: Del West Super 7 Titanium
Duration intake: 250 degrees at .050
Intake lift: .892 inch
Duration exhaust: 260 degrees at .050
Exhaust lift: .850 inch
Rockers: T+D
Rocker ratio: 2.1/2.0
Lobe separation: 106 degrees
Installed centerline: 102 degrees
Ring pack: Total Seal .043, .0325, 2mm oil
Ring endgap: .018-inch top/.030-inch second
Piston: Diamond custom forged pistons
Piston clearance: 0.001 inch
Main fasteners: ARP
Rods: Lunati 6.125 inches
Main bearings: Clevite H
Rod bearings: Clevite HN
Main journal diameter: 2.75 inch
Rod journal diameter: 2.100 inch
Main clearance: .0025 inch
Rod clearance: .0025 inch
Cylinder heads: Chevrolet Performance SB2.2
Chamber volume 50cc
Head fasteners: ARP custom studs
Intake manifold: Edelbrock
Intake port flow: 400 cfm at .900 inch
Exhaust port flow: 280 cfm at .900 inch
Intake valve: Del West Titanium, 2.18 inches
Exhaust valve: Del West Titanium, 1.60 inches
Cylinder head gaskets: Fel-Pro 1143 (.041 inch)
Piston/head clearance: .041 inch
Engine gaskets: Fel-Pro #1135
Carburetor BRE (Book) dominator-style
Carb spacer HVH/custom SAM
Header: Specialty Metal Craft
Coil MSD
Ignition MSD
Spark plug wires: MSD
Damper: ATI
Water pump: Meziere Electric
Oil pan: Williams Oil Pans
Oil pump: Schumann-modified Melling
Oil: AMSOIL 5w20
Fuels: VP Racing Fuels Q16

On The Dyno
402ci Chevy SB2.2
RPM TQ HP
4,000 530 404
4,200 555 444
4,400 567 475
4,600 600 526
4,800 624 570
5,000 638 608
5,200 648 642
5,400 650 669
5,600 653 696
5,800 659 728
6,000 664 758
6,200 664 784
6,400 660 804
6,600 651 818
6,800 641 830
7,000 634 846
7,200 622 853
7,400 604 850
7,600 584 846
7,800 564 838
8,000 546 831

SOURCE
School of Automotive Machinists
1911 Antoine
Houston
TX  77055
713-683-3817
http://www.samracing.com