Camshaft and Valvetrain

We called on our friends at Comp Cams, told them our goals for the truck, and supplied all the pertinent information. Shortly afterward, they responded with a split-duration roller cam. Lift is .601-inch, while duration at .050 lift is 214 degrees on the intake, 224 degrees on the exhaust, and lobe centers are at 110 degrees.

The decision to go with hydraulic lifters was based on two considerations. First was the reduced friction between flat tappets and cam lobes. With today’s oils, accelerated wear can be an issue, particularly during break-in—roller tappets eliminate that problem. The second consideration was performance. According to the folks at Comp Cams, in nearly all circumstances, a good roller camshaft design will outperform its flat tappet counterpart. They add that the benefits of roller cams are higher tappet velocity, more lift and more area, along with reduced valvetrain friction (often a 15-plus hp increase), and higher engine rpm with little effect on low-speed drivability and power.

Continuing the friction-fighting theme, we ordered a set of Comp Cams High Energy roller rockers. Featuring a die-cast aluminum body, they have a needle bearing fulcrum and roller tip to decrease friction and lower oil temperatures. To ensure a long service life, the pushrod sockets are fitted with steel inserts.

Heads

Internal combustion engines are basically air pumps, which means one of the keys to improving performance is to move air in and out more efficiently. To that end, the team at Ford Racing and Performance Parts got together with Jon Kaase and the results of that collaboration can be found in the new aluminum Super Cobra Jet heads.

Lots of research resulted in revised valve angles and locations to reduce cylinder-wall shrouding and improve flow, and the combustion chambers were redesigned. While there were significant changes, these heads use the same valves, valve springs, retainers, and 7⁄16-inch stud-mounted rockers as the earlier Cobra Jet heads, and the same intake and exhaust manifolds fit.

We could have spent hours porting our stock cast-iron heads and not come close to the power potential of the new SCJ heads. Add to that our stock heads needed all the guides and valves replaced, had to be surfaced, and would require machine work to install studs and guide plates, the SCJ heads were a logical choice.

Induction and Ignition

Topping off our stroker motor is a Weiand intake manifold and a FAST EFI fuel-injection system. An MSD distributor will provide spark. In our next installment we’ll detail the operation of the fuel injection, dial in the ignition’s advance curve, and have a full report on the dyno test and tune session. CCT

Super Cobra Jet Aluminum Cylinder Heads (heads are sold individually)
Ford Racing part number 397-M-6049-SCJ
Fits 429/460ci engines (except BOSS 429)
Valve size: 2.200-inch intake/1.760-inch exhaust
Intake ports: 290cc
Exhaust ports: 148cc
Combustion chambers: 72cc

SOURCE
Edelbrock (Carbs)
800-416-8628
http://www.edelbrock.com
Totally Stainless
717-677-8811
http://www.totallystainless.com
Summit Racing Equipment
PO Box 909
Akron
OH  44398
800-230-3030
330-630-0240
www.summitracing.com
Trans-Dapt Performance Products
12438 Putnam Street
Whittier
CA  90602
562-921-0404
http://www.tdperformance.com
FAST (Fuel Air Spark Technology)
3400 Democrat Road
Memphis
TN  38118
877-344-8355
www.fuelairspark.com
Fel-Pro
26555 Northwestern Highway
Southfield
MI  48033
248-354-7700
www.federal-mogul.com
ARP
1863 Eastman Avenue
Ventura
CA  93003
800-826-3045
www.arp-bolts.com
Fluidampr
180 Zoar Valley Road
Springville
NY  14141
716-592-1000
http://www.fluidampr.com
Comp Cams
3406 Democrat Road
Memphis
TN  38118
800-999-0853
http://www.compcams.com
MSD
915-857-3344
www.MSDIgnition.com
Ford Racing Performance Parts
15021 Commerce Drive S
Suite 200
Dearborn
MI  48120
800-FOR-D788
http://www.fordracingparts.com
Pro Machine
530-343-9228
www.vhrcustoms.com