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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.
Displacement
406ci
Bore x Stroke
4.155 x 3.750
Compression
11.1:1
Rod center-to-center
6.00
Piston deck height
0.00
Chamber volume
66cc
Rod bearing clearance
0.0026
Crank endplay
0.006
Piston ring endgap
0.018 top; 0.026, second
Main bearing cap torque
75 ft-lb (moly-lube)
Rod bolt torque
63 ft-lb (moly-lube)
Head bolt torque
75 ft-lb (moly-lube)
John's Cost
Manufacturer
Part Number
Description
Price
ARP
534-9701
Engine/accessory kit
70
134-2501
Harmonic balancer bolt
19
230-7002
Head bolts
140
134-5401
Main studs
40
230-7002
Oil pump stud kit
7
134-7901
Oil pump driveshaft
14
Coast High Performance
406ci Pro Mod shortblock
3,200
1.6:1 shaft-mount roller rockers
800
Comp Cams
SK12-444-8
XR300HR Small Kit*
717
7609-16
Magnum pushrods
109
210
2-Piece Billet Aluminum Timing Cover
220
Dart
11971143
Pro 1 227 CNC
2,574
68000010
Cast-aluminum valve covers
161
Edelbrock
2900
Victor Jr. port-matched manifold
224
Fel-Pro
1206
Intake gaskets
15
2812
Full set, thick front seal
100
Hot Rod Performance
Oil filter adapter
Fuel-pump block-off plate
Distributor hold-down clamp
20
Milodon
31167
Pro Competition stepped-sump oil pan
345
18316
Extreme Duty pickup
46
18750
High-volume oil pump
57
MSD Ignition
85551
Pro-Billet distributor
226
31359
8.5mm Super Conductor wire set
69
TCI Automotive
87001
Rattler harmonic balancer
280
Total
$9,453
*includes lifters and timing chain
WHAT'S IT FLOW?
Dart Pro 1 227 CNC
CFM at 28 inches H20
Lift
Intake
Exhaust
0.200
158
117
0.300
209
149
0.400
257
182
0.500
293
211
0.600
302
220
0.700
309
226
CAMSHAFT SPECIFICATIONS
Manufacturer
Comp Cams
Part Number
12-444-8
Type
Hydraulic roller
Valve lift
0.562/0.580 inch, intake/exhaust 0.600/0.619 intake/exhaust (1.6:1 rockers)
Duration at 0.050
248/254 degrees, intake/exhaust
Lobe separation
110 degrees
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