There's a long-standing assumption that the Chevy 348/409W engine is a nostalgic relic from days gone by. But as we showed last month, fresh aftermarket goodies have breathed new life into the W--576 hp, to be exact. Best of all, much of this attention is aimed at the inexpensive-to-buy 348, which was produced in far greater quantity than the more-sought-after 409.

So far we've watched as Joe Jill and the Superior Automotive crew packed the 348 block with an Eagle stroker crank and H-beam rods and forged Ross pistons to transform it into a rugged 434-cube torque maker. Now let's pick things up with a close look at Edelbrock's new Performer RPM 409 heads and perform the final assembly and dyno test.

Quick Notes
What We Did
Built a 434ci stroker

Bottom Line
The proof is in the numbers

Cost (Approx)
$8,500

Breaking News
In a collaboration of Lamar Walden and World Products, a new cast aluminum W engine block has just been released. With 4.50-inch bores it is a 509 right out of the box but can be stoked all the way to 609 ci. The bottom-end architecture, oil pan rail, and front cover are adapted from the big-block Chevy, but otherwise it accepts all W-engine external bolt-on parts and looks virtually stock. Just spray it orange and nobody will ever know. Stuff it with just-released forged pistons from Keith Black. There has never been a better time to build a W engine!

STROKER 348 CHEVY RECIPE LIST
SPECIFICATIONS
Displacement (ci) 434
Horsepower 576.8 @ 6,200 rpm
Torque (lb-ft) 516.8 @ 5,200 rpm
Compression ratio 11.7:1
Bore/Stroke (in) 4.155/4.000
Maximum safe engine speed (rpm) 7,000
Recommended shift point (rpm) 6,500
BOTTOM END
Engine block 348 Chevy bored 0.030 over to 4.155, modified exhaust valve pockets
Crankshaft Eagle 4340 forged steel 4.00-inch stroke with ESP Armor finish
Balancer PRW 6.75 diameter, SFI approved (PN 2430501)
Rods Eagle forged H-beam (PN CRS61353D)
Rod bearings Clevite 77 (PN CB-743HN)
Rod bolts ARP (included with rods)
Pistons Ross forged (PN JC120905)
Rings Total Seal gapless, Napier-style second ring (PN MO690-35)
Main caps Stock ends caps with CRV four-bolt billet steel center caps (409-4-BOL)
Main fasteners ARP 1/2-inch center studs, stock 1/2-inch endcap bolts
Main bearings Federal Mogul semigrooved (PN 4036M)
Cam bearings Dura-Bond, modified No. 5 (see text; PN CHP-4)
OILING SYSTEM
Oil pan Modified stock 348
Oil pickup tube Stock, welded to pump body
Oil pump Melling 302 Z/28 high volume (PN M-99HV-S)
Oil filter Trans-Dapt spin-on adapter (PN TRD-1059)
HEADS
Type Ported Edelbrock Performer RPM 409 (PN 60819)
Valve springs Comp double, 545 lb @ 0.650 lift
Intake valves 2.190-inch diameter (included with heads)
Exhaust valves 1.720-inch diameter (included with heads)
Retainers Isky 10° moly (PN 200-ST-10)
Lash caps Manley 11/32 inch (PN 42104-16)
Rocker arms PRW 1.7 roller, aluminum billet (PN 0245432)
Head gaskets Victor-Reinz, 0.040 inch thick (PN 1195VC)
Head bolts Edelbrock 409 head fastener kit (PN 8581)
CAMSHAFT
Type Isky solid roller (PN R-561)
Advertised duration 294/294
Duration at 0.050 lift 260/260
Lift 0.639/0.639
Lobe center (deg) 112
Pushrods Isky 3/8 moly
Lifters Isky solid roller
Timing chain Cloyes True Roller double (PN 9-3101)
Thrust button Manley solid aluminum (PN 42146)
INDUCTION
Intake manifold LWA/CRW single plane (PN 409SP-PLENUM)
Carburetor Holley 950 double-pumper (PN 0-80496-1)
IGNITION
Distributor MSD 348/409 Pro-Billet (PN 8393)
Spark plugs Champion RC12YC
Wires MSD Super Conductor, 8.5 mm
Timing specs (deg) 40 BTDC
Vacuum advance None
MISCELLANEOUS
Water pump Edelbrock high-volume (PN 8858)
Valve covers Edelbrock (PN 41403), black powdercoat removed
SOURCE
COMP Cams Lamar Walden Automotive (LWA)
N/A
Edelbrock Corp.
2700 California St.
Torrance
CA  90503
310-781-2222
www.edelbrock.com
Manley Performance
1960 Swarthmore Ave.
Lakewood
NJ  08701
7-32/-905-3366
www.manleyperformance.com
Holley Performance Products
1801 Russellville Rd.
Bowling Green, KY 42101
KY  42101
270-782-2900
www.holley.com
MSD
El Paso
TX  79936
915-857-5200
www.msdignition.com
Innovative Machine & Supply
N/A
innomach.com
Performance Racing Warehouse
888-377-9779
www.performanceracingwarehouse.c
om
Isky
N/A
iskycams
Superior Automotive
Anaheim
CA
7-14/-503-1880
superiorautomotive.com
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