383ci Stroker Small-Block Engine Build - Second Chance 383

A Stroker Small-Block Combo For the Street

Sean Haggai Mar 14, 2011 0 Comment(s)
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STROKER 383

1. For testing, our 383 utilized a combination of PerTronix distributor and Flame-Thrower coil. The Flame-Thrower plug-and-play billet distributor offers the Ignitor III electronic ignition module and a 6061-T6 polished billet housing. Plus, a built-in LED allows rev limiter setting.

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2. COMP’s solid roller camshaft with a small base circle spec’d out with 0.571-/0.577-inch intake/exhaust and 242/248 degrees intake/exhaust of duration at 0.050 inch. Our lobe separation was 110 degrees.

3. Both manifold testing used a set of Vrbancic dyno headers with 17/8-inch primary tubes.

4. Holley’s Street Avenger offers a trouble-free carburetor that’s calibrated to give you performance without all the headaches. This 870 featured a tunable metering system, fuel filters in the primary and secondary fuel bowls, center-hung floats, external float adjustments with sight plugs, electric choke, emissions accessory ports, adjustable secondaries, power valve saver, and dual-feed conversion fuel line.

5. Oil control was handled by a Milodon low-profile deep sump oil pan with side kick outs. Inside sat a diamond stripper windage tray to keep splash at a minimum.

CAM SPECS
Manufacturer COMP Cams
PN 12-000-8
Type Solid roller
Valve Lift 0.571/0.577 inch, intake/exhaust
Duration at 0.050 242/248, intake/exhaust
Lash 0.016/0.018, intake/exhaust
Lobe Separation Angle 110 degrees

DYNO DETAILS
Size 383 Size 383
Intake Street Warrior dual-plane Intake Team G single-plane
Headers tk Headers tk
Advance 36 Advance 40
Fuel 91 Fuel 91
Carb 870 cfm Carb 870 cfm
Jets 84/86 Jets 84/86
Max. Torque 474 at 4,700 rpm Max. Torque 475 at 4,800 rpm
Max. Power 490 at 5,800 rpm Max. Power 493 at 6,100 rpm
Avg. Torque 455 Avg. Torque 444
Avg. Power 408 Avg. Power 402
RPM TQ HP RPM TQ HP
3,000 443 253 3,000 412 235
3,100 451 266 3,100 416 246
3,200 456 278 3,200 418 255
3,300 463 291 3,300 417 262
3,400 468 303 3,400 421 273
3,500 470 314 3,500 432 288
3,600 471 323 3,600 440 302
3,700 472 332 3,700 444 313
3,800 470 340 3,800 445 322
3,900 467 347 3,900 443 329
4,000 465 354 4,000 443 337
4,100 464 362 4,100 446 348
4,200 464 371 4,200 453 362
4,300 467 382 4,300 460 376
4,400 469 393 4,400 466 391
4,500 472 405 4,500 470 403
4,600 474 415 4,600 473 415
4,700 474 424 4,700 474 424
4,800 474 433 4,800 475 434
4,900 473 442 4,900 475 443
5,000 473 450 5,000 475 452
5,100 471 457 5,100 473 460
5,200 469 464 5,200 472 468
5,300 466 470 5,300 469 473
5,400 464 477 5,400 466 480
5,500 461 482 5,500 462 484
5,600 455 485 5,600 457 487
5,700 450 488 5,700 450 488
5,800 444 490 5,800 444 491
5,900 437 490 5,900 436 490
6,000 429 490 6,000 430 491
6,100 422 490 6,100 424 493
6,200 413 488 6,200 416 491
6,300 405 486 6,300 408 490
6,400 396 483 6,400 400 489
6,500 388 480 6,500 394 487

Weiand: Dual- vs. Single-Plane

For our testing, we tried two manifolds on the dyno. Our Weiand Speed Warrior (dual-plane) intake manifold was first. It featured long, separated runners for bottom-end and midrange power, plus a special runner design and larger plenum to flow the air needed from idle all the way up for high-rpm horsepower at 6,000 rpm. The Weiand Team G (single-plane) manifold is designed to build power further up in the rpm, from 2,000 to 8,000 rpm. The single-plane manifold has a raised plenum for increased flow and isolated water passages for improved cooling. Most models feature integral bosses for nitrous oxide.

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THE PARTS BIN
MFG PN ITEM
COMP 818-16 Endure-X solid-roller lifters
12-000-8 Custom grind solid-roller camshaft
1604-16 Ultra Pro Magnum roller rockers
Fel-Pro 1881 One-piece oil pan gasket
1003 Head gasket set
1205 Intake gasket set
Holley 0-80870 Street avenger 870-cfm carburetor
Patriot Performance 2068 Freedom Super Street Series CNC-ported cylinder heads (complete)
Pertronix 60103 Flame-Thrower Coil
D7100700 Flame-Thrower plug ’n’ play distributor
Weiand 8501 Street Warrior dual-plane manifold
7532 Team G single-plane manifold

Sources

Comp Cams
Memphis, TN 38118
800-999-0853
http://www.compcams.com
Patriot Performance
Rainbow, AL 35906
888-462-8276
www.patriot-performance.com
Vrbancic Brothers Racing
909-930-9980
www.customcarbs.com

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