Performance Engine Building - Off-The-Shelf Steam

Easy 414hp Gain With a Little Boost!

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Let’s not kid ourselves; the fine art of cylinder head porting, along with trick engine-building techniques, can go a long way with closed-course competition applications. However, for the average do-it-yourselfer who wants big numbers, whether it’s on the dyno or at the track, we can take solace knowing that today’s manufacturers are producing components that will transform any weekend engine builder into a local hero. That’s right; we’re talking about a level of performance that was until recently reserved for those with deep pockets.

The recipe is simple: Start with a solid foundation, be it a mild or big cubic-inch stroker assembly and then add the induction of your choice. Given the caliber of cylinder heads and power adders available, it’s only a matter of deciding how far you want to go. In our case, we wanted to put together a blow-through supercharger combination that was mild enough for cruise nights yet powerful enough to throw down numbers on any given test and tune session.

This month’s featured combination is the first of a two-part series showing just how radical you can get. For the first rendition, we started with a standard 9.8-inch deck Dart Big M block; Dart built a limited supply of complete short-blocks as a test program and we were fortunate enough to get our hands on one. Don’t fret, even though this came to us complete, the internals are widely available from most speed shops. Inside, the rotating assembly consists of a forged Eagle Specialties 4.00-inch crankshaft, and forged Engine Pro 6.385-inch rods with Keith Black flat-top pistons.

Working our way up, we wanted a set of heavy breathers that would support upper-level horsepower while being able to evacuate the spent gases in a hurry. Our cylinder heads of choice were the Brodix BB-3 Xtras with its line of HV 2000 intake manifold. For the power adder, we went with Vortech’s Ysi supercharger and relied on our trusty Holley 750hp carburetor that’s been modified by The Carb Shop. At the center of our creation, we have a custom-grind COMP bumpstick, including a complete COMP valvetrain. With everything in check, our 454ci produced 2.1 hp/ci, translating into 965 hp and 877 lb-ft! It’s impressive to say the least, so follow along and see what it takes to replicate the combination for yourself.

The Carb Shop

To say we’ve been fortunate to work with The Carb Shop out of Ontario, California, would be a complete understatement. For the past several years, they’ve been an integral part of our blow-through supercharger coverage and, for a lack of better words, they’re the real heroes behind our successful dyno and track sessions.

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And if you didn’t already know, they’re gearheads well versed in building everything from performance carburetors to engines, even fielding their own cars down the dragstrip. It’s this type of R&D that has put them on the leading edge of blow-through technology. More importantly for your wallet, their custom-order blow-through carbs are very affordable and can be had for $840 complete or $450 by sending in your own to get modified. For more information, head over to www.customcarbs.com.

454 Buildsheet
Displacement 454
Bore x Stroke 4.250 x 4.00
Compression 8:1
Rod Center-to-Center 6.385
Piston Deck Height 0.000
Chamber Volume 119 cc
Rod Bearing Clearance 0.0025
Crank endplay 0.008
Piston Ring
Endgap 0.028 top, 0.024 second
Main Bearing Cap Torque 100 ft-lb (moly-lube)
Rod Bolt Torque 65 ft-lb (moly-lube)
Head Stud Torque 70 ft-lb (moly-lube)

Parts List
MFG PN ITEM
ARP 235-4702 head studs
Brodix 2038108 CNC BB-3 Xtra O
HV 2000 manifold
COMP Cams 11-000-9 camshaft
1620-16 Ultra Pro Magnum roller rockers
8996-16 Endure-X solid-roller lifters
8253-1 (8) 9.400-inch pushrods
8223-1 (8) 8.650-inch pushrods
6200 beltdrive
281 valve covers
Dart Call 454ci short-block
Fel-Pro 1077-1 head gaskets
Holley 80528 750 hp
Moroso 20403 oil pan
22163 high-volume billet oil pump
25970 dipstick kit
38361 oil pan stud kit
The Carb Shop Call blow-through modifications
Vortech Engineering Call Ysi
4GA111-031 big-block brackets

Brodix BP BB-3 Xtra O 332 Specs
Intake Port 332 cc
Chamber Volume 119 cc
Intake/Exhaust Valves 2.300/1.880
Exhaust Pattern standard
Valve centerline standard
Flow Data
Intake Exhaust
0.200 154 130
0.300 237 177
0.400 307 239
0.500 362 278
0.600 394 284
0.700 416 290
0.800 423 295
0.900 423 297
*CFM at 28 inches H20

Cam Specs
Manufacturer COMP Cams
PN 11-000-9
Type solid roller
Valve Lift 0.650/0.650 inch, intake/exhaust
Duration at 0.050 245/250 degrees, intake/exhaust
Lash 0.022/0.024, intake/exhaust
Lobe Separation Angle 112 degrees

Dyno Details
Size 454 Size 454, Ysi, 16.7 psi
Intake Brodix HV 2000 Intake Brodix HV 2000
Headers 21/8 Hedman long-tube headers with 18-inch extensions Headers 21/8 Hedman long-tube headers with 18-inch extensions
Advance 37 degrees Advance 34 degrees
Fuel 91 Fuel VP C16
Carb The Carb Shop 750 Carb The Carb Shop 750
Jets 72/84 Jets 77/89
Max. Torque 501 at 5,000 Max. Torque 877 at 5,500
Max. Power 551 at 6,300 Max. Power 965 at 5,900
Avg. Torque 474 Avg. Torque 793
Avg. Power 453 Avg. Power 764
RPM TQ HP RPM TQ HP
3,500 439 293 3,500 616 411
3,600 438 300 3,600 634 435
3,700 435 306 3,700 649 457
3,800 432 312 3,800 669 484
3,900 436 324 3,900 691 513
4,000 445 339 4,000 716 545
4,100 456 356 4,100 734 573
4,200 465 372 4,200 749 599
4,300 473 387 4,300 761 623
4,400 480 402 4,400 777 651
4,500 484 415 4,500 792 679
4,600 490 429 4,600 806 706
4,700 494 442 4,700 824 737
4,800 497 454 4,800 835 763
4,900 498 465 4,900 844 788
5,000 501 477 5,000 855 814
5,100 501 487 5,100 865 840
5,200 500 495 5,200 870 861
5,300 500 504 5,300 874 882
5,400 499 513 5,400 876 901
5,500 499 522 5,500 877 918
5,600 497 530 5,600 877 936
5,700 493 535 5,700 875 950
5,800 488 539 5,800 869 959
5,900 483 543 5,900 859 965
6,000 477 545 6,000 845 965
6,100 471 547 6,100 830 964
6,200 465 549 6,200 812 958
6,300 460 551 6,300 788 945
6,400 452 551 6,400 764 931
6,500 444 550 6,500 745 922
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

Step By Step

Vortech Engineering’s Ysi supercharger can pack a punch and has powered a number of class cars well into 8-second quarter-mile times. Max impeller speed is rated at 65,000 rpm with a max flow rating of 1,600 cfm. For our cog pulley combination, we used an 80-tooth lower with a 29-tooth upper, which produced 16.7 psi of boost. CHP

Sources

Brodix
Mena, AR 71953
479-394-1075
http://www.brodix.com
Comp Cams
Memphis, TN 38118
800-999-0853
http://www.compcams.com
The Carb Shop
Ontario, CA
909-947-3575
CustomCarbs.com
Vortech Engineering
Oxnard, CA 93033
805-247-0226
www.vortechsuperchargers.com
Dart Heads
Troy, MI 48084
248-362-1188
http://www.dartheads.com
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