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Pontiac Pavement Pounders Shootout SoCal Edition, Part I

Pon 0509 Shoot 14 Z
Strip Specs
Year/Model'98 Trans Am
Race Weight3,472 lbs
Curb Weight3,335 lbs
EngineOriginal '98 LS1
Cubic Inches Before/After Bore346/346
Compression Ratio10.2:1
Built ByGM
FuelUnocal 91-octane
Fuel InjectionFactory GM
Injectors28 lb/hr
MAF75mm
Throttle Body75mm, ported
Intake ManifoldSLP LS6 intake
Fuel PumpFactory GM, Directflo airbox
Head Year'98 LS1
Head PortingNo
ValvesFactory GM 2.00/1.55 in
Pistons/RingsStock GM Hypereutectic 3.9-in bore/factory GM
RodsStock forged powdered metal
CrankshaftStock nodular iron, 3.62 stroke
Rotating Assembly BalancedFactory-balanced
Camshaft BrandLS6 hyd roller, 204/218 deg at 0.050, 0.551/0.547-in lift with 1.7:1 rocker arms, 117.5 deg LSA
Installed PositionStraight up
IgnitionGM crank trigger ignition, timing controlled by PCM
ExhaustMAC headers, 1.75-in primaries, 21/2-in Y-Pipe, MAC cats, and WS6 muffler with cutout
Power AdderNone
ConverterVigilante, 3,800-stall, 9.5-in
TransmissionFactory 4L60-E, rebuilt by The Toy Shop, custom shift kit, stock shifter
RearFactory 7.5-in, 3.42 gears, limited slip
Brakes Front/RearStock disc
Wheels/Tires Front15x4-in Weld/24x4.5x15 Mickey Thompson
Wheels/Tires Rear16x8-in Trans Am/255/50-16 Mickey Thompson ET Street Radials
Tire pressure Front/Rear32 psi/16 psi
Suspension FrontStock, front swaybar removed
Suspension RearStock except for Global West lower control arms
Chassis ModificationsNone
Interior ModificationsNone
Exterior ModificationsPainted hood bird with flames, painted in blue pearl metallic
Safety ModificationsNone
Custom Comp ProgrammingCarolina Auto Masters
Launch Technique
Bracket RacingFootbrake - leave at idle
Test & TuneFootbrake - leave at 1,800
Best ET/MPH Prior to Event (1/4-Mile)12.21 at 110.25 at Famoso Raceway

Strip Tuning Log
Run #/TuningLaunch RPMShift Point60-Foot TimeET/MPH 1/8-MileET/MPH 1/4-MileCorrected 1/4-Mile
1. 17 psi in tiresIdle6,1001.758.14/84.4512.81/105.2512.39/108.79
2. 16 psi in tires1,5006,1001.738.11/84.3912.79/105.2612.37/108.80
3. Same1,8006,1001.748.13/84.3612.80/105.0612.38/108.60
4. Same2,0006,1001.748.15/84.3612.83/104.9712.41/108.50
5. Same1,5006,1001.748.15/84.2512.84/104.9812.42/108.51
Run Analysis: Run 1) good launch, no tire spin; Run 2) car dead hooked; Run 3) felt like tires spin a little; Run 4) hooked and ran well, but e.t. was off; Run 5) same

Pon 0509 Shoot 11 Z Pon 0509 Shoot 13 Z Pon 0509 Shoot 13 Z

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Pontiac G6 Research
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