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Chevy Small Block Dyno Tests - Old School Meets New


406CI BUILD SHEET
Specifications not listed are the same as stock. Except as noted, all dimensions are in inches or fractions thereof. All prices sourced through Coast High Performance and Summit Racing.
Displacement406ci
Bore x Stroke4.155 x 3.750
Compression 11.1:1
Rod center-to-center6.00
Piston deck height0.00
Chamber volume66cc
Rod bearing clearance0.0026
Crank endplay0.006
Piston ring endgap0.018 top; 0.026, second
Main bearing cap torque75 ft-lb (moly-lube)
Rod bolt torque63 ft-lb (moly-lube)
Head bolt torque75 ft-lb (moly-lube)
John's Cost
ManufacturerPart NumberDescriptionPrice
ARP534-9701Engine/accessory kit70
134-2501Harmonic balancer bolt19
230-7002Head bolts140
134-5401Main studs40
230-7002Oil pump stud kit7
134-7901Oil pump driveshaft14
Coast High Performance406ci Pro Mod shortblock3,200
1.6:1 shaft-mount roller rockers800
Comp CamsSK12-444-8XR300HR Small Kit*717
7609-16Magnum pushrods109
2102-Piece Billet Aluminum Timing Cover220
Dart11971143Pro 1 227 CNC2,574
68000010Cast-aluminum valve covers161
Edelbrock2900Victor Jr. port-matched manifold224
Fel-Pro1206Intake gaskets15
2812Full set, thick front seal100
Hot Rod PerformanceOil filter adapter
Fuel-pump block-off plate
Distributor hold-down clamp20
Milodon31167Pro Competition stepped-sump oil pan345
18316Extreme Duty pickup46
18750High-volume oil pump57
MSD Ignition85551Pro-Billet distributor226
313598.5mm Super Conductor wire set69
TCI Automotive87001Rattler harmonic balancer280
Total$9,453
*includes lifters and timing chain

WHAT'S IT FLOW?
Dart Pro 1 227 CNC
CFM at 28 inches H20
LiftIntakeExhaust
0.200158117
0.300209149
0.400257182
0.500293211
0.600302220
0.700309226

CAMSHAFT SPECIFICATIONS
ManufacturerComp Cams
Part Number12-444-8
TypeHydraulic roller
Valve lift0.562/0.580 inch, intake/exhaust 0.600/0.619 intake/exhaust (1.6:1 rockers)
Duration at 0.050248/254 degrees, intake/exhaust
Lobe separation110 degrees

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