PART EIGHT: LIGHTING THE FIRE

We went over the cooler points of the MSD 6LS ignition box and coils during the dyno test. Since the box was plugged into the cam, crankshaft, and MAP sensors already, once the engine was in the truck we simply had to wire up the ground wire to the block and a 12-volt positive ignition wire to the steering column switch. The engine lit right off with a twist of the key.

The Final Word
After a short chassis dyno-tuning session at Westech Performance to obtain the most fuel-efficient tune-up that still made good power, I hit the road. It was interesting to see that the engine lost about 80 horsepower on the chassis dyno due to the parasitic losses from spinning the drivetrain. Still, the engine put over 308 hp to the rear wheels.

The Parts Racer will barbecue the passenger-side rear wheel with ease, even with 3.08 cogs in the open 12-bolt differential. Out on the highway, those cogs, lockup torque converter, and the 27.5-inch-tall tires yield a super-low 1,600-rpm cruising rpm at 70 mph. At 80 mph, the engine is barely spinning 1,900 rpm, and the engine is not lugging thanks to the 300-plus lb-ft of torque the LS327 is making at that rpm and the perfect match of the transmission, converter, and camshaft. It reminds me of a few late-model Corvettes that I've driven that could effortlessly cruise at such a low rpm but still push you back into the seat when you hammered down the gas pedal, and get great mileage. Check back next month for a stellar road trip story and see how well we fared at the gas pump. We plan on putting 4,500 miles on this beast in nine days, so there will be plenty of opportunities to stress-test this combo.

SOURCE
MSD IGNITIONS
El Paso
915-857-5200
www.msdignition.com
Chevrolet Performance Parts
P.O. Box 33170
Detroit
MI  48232
800-577-6888
http://www.gmperformanceparts.co
m
Gearstar Performance Transmissions
132 N. Howard St.
Akron  44308
330-434-5216
http://www.gearstar.net
Holley Performance Products/Brands
1801 Russellville Rd.
Bowling Green
KY  42101
270-781-9741
www.holley.com
Earl's
1801 Russellville Road
Bowling Green
KY  42101
270-781-9741
www.earlsplumbing.com
Hedman Hedders
12438 Putnam Street
Whittier
CA  90602
562-921-0404
http://www.hedman.com
Flowmaster Inc.
100 Stony Point Road
Suite 125
Santa Rosa
CA  95401
800-544-4761
http://www.flowmastermufflers.co
m
BRP Muscle Rods
5849 Rogers Rd.
Cumming
GA  30040
770-751-0687
www.musclerods.com
Flex-A-Lite
7213-45th St Ct E
Fife
WA  98424
253-922-2700
http://www.flex-a-lite.com
Lokar
10924 Murdock Drive
Knoxville
TN  37932
877-469-7440
www.lokar.com
TCI Automotive
151 Industrial Drive
Ashland
MS  38603
888-776-9824
http://www.tciauto.com
Powermaster
1833 Downs Drive
West Chicago
IL  60185
630-957-4019
www.powermasterperformance.com
HGM
24009 Hawthorne Blvd
Torrance
CA  90505
310-787-9260
www.hgmelectronics.com
Street And Performance
Mena
AZ
479-394-5711
http://www.hotrodlane.cc