FROM THE DRIVER SEAT
The humble little 5.3L has gone through quite a progression, starting at 346 HP and 373 lb-ft of torque. The modifications to the original 5.3L covered previously in part one upped the power ante to 483 HP and 438 lb-ft of torque. Looking to increase torque production, we stepped up to the 383ci stroker, which increased the peak numbers to 480 HP and 491 lb-ft of torque. Replacing the stock truck intake with the new LSXRT from FAST resulted in impressive gains. The new totals stood at 510 HP and 508 lb-ft of torque. Installation of the Vortech twin-screw supercharger put the final tally at 671 HP and 658 lb-ft of torque. Though more power is obviously available with increased boost and or wilder cam timing, this combination offered exceptional idle quality and low-speed torque production-perfect for a performance truck application.

YOUR QUESTIONS ANSWERED

Time Spent Working: 14 hours
Degree of Difficulty: Advanced

Tools Needed:
8,10,12,13, 15mm socket, in-lb torque wrench, lb-ft torque wrench, gear puller, flare nut wrenches

Parts Used:
ATI Performance Products harmonic balancer 917286 $456.02
Trick Flow GenX 202 CNC heads 30500001 $1,995.95
Trick Flow TrackMax cam 30602002 $349.95
Total Engine Airflow Stage 2 LS1 heads for 5.3L $1,699.80
FAST LSXRT intake manifold 146602 $994.95
FAST 102mm Big Mouth throttle-body $556.95
Vortech Superchargers twin-screw supercharger 2310010 $5,023.00
Wilson LSX fuel rails 422031 $207.95

Total: $11,284.57
(All prices from summitracing.com or manufacturers, do not include tax, shipping, or installation. It should also be noted that not all parts are listed. For more information, contact the sources.)

SOURCE
Trick Flow Specialties
1248 Southeast Avenue
Tallmadge
OH  44278
330-630-1555
http://www.trickflow.com
L&R Automotive
13731 Bora Drive
Sante Fe Springs
CA  90670
562-802-0443
www.lnrengine.com
Vortech Engineering
1650 Pacific Avenue
Oxnard
CA  93033
805-247-0226
http://www.vortechsuperchargers.
com
Pro Comp Electronics
605 S Milliken Avenue
Unit A
Ontario
CA  91761
909-605-1123
www.procompelectronics.com
Demon Engines
Sante Fe Springs
CA
562-694-2559
www.demonengines.com
Comp Cams/Fast
3406 Democrat Road
Memphis
TN  38118
800-999-0853
www.compcams.com
Total Engine Airflow
285 West Avenue
Tallmadge
OH  44278
330-784-4382
http://www.totalengineairflow.co
m
Probe Industries
2555 West 237th Street
Torrance
CA  90505
310-784-2977
http://www.probeindustries.com
ATI Performance Products
6747 Whitestone Road
Baltimore
MD  21207
877-298-5039
http://www.atiracing.com