434ci Small-Block Engine Build - The Bigger Mouse

Packing a Punch With a 434ci Small-Block Stroker

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Flow Data
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
*cfm at 28 inches H20

Dart Pro 1 CNC 227 Specs
Intake port 227cc
Chamber volume 66cc
Intake/exhaust valves 2.08/1.60

Cam Specs

Manufacturer COMP Cams
PN 12-433-8
Grind number XR288HR
Type hydraulic roller
Valve lift 0.520/0.0540-inch, intake/exhaust
Duration at 0.050 236/242 degrees, intake/exhaust
Lobe separation angle 110 degrees

Dyno Details

Headers 13/4-inch long-tube headers with 18-inch extensions and mufflers
Advance 39 degrees
Fuel 91-octane
Carb Holley 750 Ultra HP
Jets 73/74
Max Torque 552 at 4,500
Max Power 542 at 5,700
Avg. Torque 461
Avg. Power 527

434 Buildsheet
Displacement 434
Bore x stroke 4.155 by 4.000 inches
Compression 10.3:1
Rod center-to-center 6.00 inches
Piston deck height 0.000
Chamber volume 66cc
Rod bearing clearance 0.0025
Crank endplay 0.007
Main bearing cap torque 1-5 7/16 bolts 65 ft-lb (moly-lube)
2, 3 & 4 3/8 bolts 35 ft-lb (moly-lube)
Rod bolt torque 70 ft-lb (moly-lube)
Head bolt torque 80 ft-lb (moly-lube)

By The Numbers
RPM TQ HP
3,200 499 304
3,300 500 314
3,400 505 327
3,500 515 343
3,600 526 360
3,700 533 376
3,800 540 391
3,900 546 405
4,000 549 418
4,100 550 430
4,200 551 441
4,300 551 451
4,400 551 462
4,500 552 473
4,600 552 484
4,700 551 493
4,800 549 502
4,900 546 510
5,000 542 516
5,100 538 522
5,200 533 528
5,300 528 533
5,400 522 537
5,500 515 539
5,600 507 540
5,700 499 542
5,800 491 542
5,900 481 541
6,000 472 540

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Parts List
MFG PN Item
ARP 234-4301 head studs
400-7614 valve cover studs
400-1212 header bolts
435-1902 oil pan studs
230-7004 oil pump stud
334-1401 timing cover
430-3201 water pump
434-2001 intake
300-2404 carb studs
430-1702 distributor stud
134-2501 damper bolt
300-1001 cam bolt
134-7901 oil pump drive
200-2902 flexplate
COMP Cams 12-433-8 Extreme Energy retrofit camshaft
7100 Keyway adjustable billet timing set
210 two-piece billet aluminum timing cover
1605-16 1.6 Ratio Ultra Pro Magnum rockers
853-16 High Energy hydraulic roller lifters
7957-16 7.500-inch, 5/16 Hi-Tech pushrods
4506-16 7/16 Hi-Tech rocker arm studs
Dart Call 434 short-block
11970040P Pro1 CNC 227 aluminum heads
68000015 valve covers
42412000 single-plane manifold
Federal-Mogul 1144 (2) head gaskets
1206 intake gaskets
1405 exhaust gaskets
1880 oil pan gasket
2701 R.A.C.E
1928 valve cover gaskets
Holley 0-80803BK 750 Ultra HP
Moroso 20196 oil pan
22134 oil pump and pickup
25971 dipstick
72230 DuraFire distributor
73607 Ultra 40 Race ignition wire set

Sources

Westech Performance Group
Mira Loma, CA
951-685-4767
WestechPerformance.com
Comp Cams
Memphis, TN 38118
800-999-0853
http://www.compcams.com
Dart Machinery
Troy, MI 48084
248-362-1188
www.dartheads.com
A.R.E. Performance & Machine
Simi Valley, CA 93065
805-583-0602
http://www.areperformance.com

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