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VMP Edition Shootout Part 4 - Pontiac Pavement Pounders

1998 Pontiac Firebird Formula Burnout
Strip Tuning Log
Run/TuningLaunch RPMShift Pt.60-ft.1/8-mile1/4-mile
5. 15.5 psi rear, 45 psi front3,0006,6001.476.81/99.1810.78/123.22
6. Same3,0006,6001.456.82/98.8410.80/123.07
7. Same3,0006,6001.476.81/99.1910.78/123.45
Best Pass Corrected10.57/125.90
8. Same3,0006,6001.486.85/98.6810.83/122.99
9. 16 psi rear, 45 psi front3,0006,6001.466.84/98.8310.81/123.29
Five most important runs listed

1998 Pontiac Firebird Formula Owners
Strip Specs
Year/Model'98 Firebird Formula
Race Weight With Driver3,400 lbs
Curb Weight3,170 lbs
Fuel Level When Weighed½-tank
Fuel104-octane
EngineLS6
Cubic Inches Before/After346/346
Engine Built ByNicely/Roberts
Power-AdderNOS 5177 dry kit, 100hp,
not used during event

Induction System
AirboxLS1 Motorsports
MAFSLP 85mm
Throttle BodyNick Williams 90mm
Fuel InjectorsZ06 28.8-lb/hr
Custom ProgrammingTony Roberts

Fuel System
PumpGM Stock
LinesGM Stock
RegulatorGM Stock

Heads
CastingAFR 225cc
Head PortingMinor blending
Flow NumbersN/A
Valves2.055-in Ferrea intake/1.55-in GM Z06 exhaust

Bottom End
PistonsDiamond 3.90-in forged aluminum
RingsDiamond Pro Select Rings, file-fit
RodsEagle 4340 forged-steel featherweight, 6.125-in
Compression Ratio11.0:1      
CrankshaftLS6 modified, stock 3.62-in stroke
Rotating Assembly BalancedYes

Camshaft
BrandComp Cams hydraulic roller
Duration at 0.050228/234-deg
Duration AdvertisedN/A
Lift With Specified Rocker Arms0.597/0.607-in
Lobe Separation Angle110-deg
Installed PositionStraight up
Rocker ArmsGM 1.7:1-ratio

Ignition
TypeGM crank trigger
AmplifierNone
CoilGM coil packs
WiresTaylor 10mm
Spark PlugsNGK TR55
Total Timing30-deg
RPM That Total Timing Is Reached4,000

1998 Pontiac Firebird Formula Engine
Exhaust
HeadersAmerican Racing
Primaries1.875-in
Collectors3.00-in
Exhaust Pipes3.00x14.00-in long with turndowns
Mufflers: None
Crossover: None

Drivetrain
TransmissionTurbo 400, Carl Rossler, reverse manual valvebody with transbrake
ConverterATI Treemaster, 4,000-rpm
ShifterB&M Pro Shifter
RearBillingsley Racing 9-in, Strange NOD centersection
Rear Gear Ratio4.10:1
SpoolStrange
AxlesStrange 35-spline

Chassis and Suspension
Brakes F/RAerospace SJM ABS delete/stock GM
Wheels F/RWeld Prostar 15x3.5/15x10
Tires F/RM/T Front Runner 26x4.5x15/ M/T ET Drag 26x10x15
Tire Pressure F/R40 psi/15 psi
Suspension Front:
Struts/SpringsQA1
Control ArmsSpohn tubular upper and lower
Stabilizer BarRemoved
Other Mods Spohn tubular K-member, travel limiters for
front end, Madman Racing manual steering rack
Suspension Rear:
SpringsStock GM
Control ArmsSpohn adjustable
Stabilizer BarSpohn drag bar, adjustable
ShocksStock GM
Other Mods Spohn torque arm, double driveshaft
safety loops, Spohn Panhard bar, airbag in right spring

The Rest
Chassis Mods12-point rollbar
Interior ModsKirkey seat
Exterior ModsRam Air hood
Safety ModsSFI-approved drivetrain parts,
Simpson safety belt, rollbar padding
Launch Technique Launch at 3,000, shift at 6,800
Best 1/8-mile E.T./MPH Prior to Event6.777/102.587
Best 1/4-mile E.T./MPH Prior to Event10.752/123.59


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