434 Engine Power Upgrades Dyno
434 Engine Power Upgrades Cheater System
The NOS Competition Cheater System includes formed extension tubes for both the nitrous and fuel solenoids. However, we borrowed premade AN-4 stainless braided lines for a quicker installation on the dyno.
The NOS Competition Cheater System includes formed extension tubes for both the nitrous an

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

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

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

434 Engine Power Upgrades Inlet Port
To mount the fuel solenoid, simply install the inline filter on the inlet port and the 1/8-inch NPT compression fitting on the outlet side. For wiring, one wire is the ground and the other is the hot lead that connects to the microswitch (the switch that’s activated when you press the throttle to the floor).
To mount the fuel solenoid, simply install the inline filter on the inlet port and the 1/8

Dyno Details
Headers 13/4-inch long-tubes
Advance Motor 40 degrees
100-shot 33 degrees
150-shot 33 degrees
Fuel 91 octane
Carb Holley 950 Ultra HP

Motor
RPM LB-FT HP
3,100 487 288
3,200 491 299
3,300 499 313
3,400 507 328
3,500 517 344
3,600 525 360
3,700 531 374
3,800 536 388
3,900 539 401
4,000 543 414
4,100 547 427
4,200 551 441
4,300 554 454
4,400 556 466
4,500 558 478
4,600 558 489
4,700 558 499
4,800 557 509
4,900 555 518
5,000 552 526
5,100 548 532
5,200 542 537
5,300 537 542
5,400 531 546
5,500 524 549
5,600 518 553
5,700 511 554
5,800 502 555
5,900 494 554
6,000 485 554
6,100 476 552
6,200 464 548
6,300 454 544
Max Torque 558 at 4,500
Max Power 555 at 5,800
Avg. Torque 524
Avg. Power 468

434 Engine Power Upgrades Nitrous Solenoid Install
Installing the nitrous solenoid is a similar process. The nitrous filter foes on the inlet port, and the other 1/8-inch NPT compression fitting is mounted to the outlet; for wiring you can attach the ground and the hot lead to the same wires as the nitrous solenoid.
Installing the nitrous solenoid is a similar process. The nitrous filter foes on the inlet

100-shot
RPM LB-FT HP
3,100 475 280
3,200 478 291
3,300 487 306
3,400 497 322
3,500 507 338
3,600 513 352
3,700 519 365
3,800 523 379
3,900 526 391
4,000 530 404
4,100 535 418
4,200 539 431
4,300 542 443
4,400 544 456
4,500 545 467
4,600 548 480
4,700 553 494
4,800 581 531
4,900 654 610
5,000 705 671
5,100 701 681
5,200 680 673
5,300 654 660
5,400 632 650
5,500 616 646
5,600 604 645
5,700 594 644
5,800 580 641
5,900 569 639
6,000 556 636
6,100 543 631
6,200 530 626
6,300 516 619
Max Torque 705 at 5,000
Max Power 681 at 5,100
Avg. Torque 563
Avg. Power 510

434 Engine Power Upgrades Finished
This 434ci can pack a punch, and with 718 hp on tap, it should be good enough to propel a 3,400-pound ride into the 9s. Keep an eye out for this one, because we may have to test out this theory.
This 434ci can pack a punch, and with 718 hp on tap, it should be good enough to propel a

150-shot
RPM LB-FT HP
3,100 471 278
3,200 475 289
3,300 482 303
3,400 491 318
3,500 500 333
3,600 510 349
3,700 518 365
3,800 523 378
3,900 524 389
4,000 526 401
4,100 529 413
4,200 536 428
4,300 541 443
4,400 543 455
4,500 543 465
4,600 543 476
4,700 548 490
4,800 554 507
4,900 601 561
5,000 698 664
5,100 732 711
5,200 725 718
5,300 708 715
5,400 692 711
5,500 677 709
5,600 663 707
5,700 650 706
5,800 639 706
5,900 625 702
6,000 613 700
6,100 599 696
6,200 582 687
6,300 568 681
Max Torque 732 at 5,100
Max Power 718 at 5,200
Avg. Torque 580
Avg. Power 529

SOURCE
Holley
1801 Russellville Road
Bowling Green
KY  42101
270-781-9741
www.holley.com 		Westech Performance Group
11098 Venture Drive
Unit C
Mira Loma
CA  91752
951-685-4767
www.westechperformance.com