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Pontiac Pavement Pounders Shootout - VMP Edition Part 2

1970 Gto Front View 1970 Gto Engine Front View John Labuda Front View
Strip Tuning Log
Run/TuningLaunch RPMShift Pt.60-ft.1/8-mile1/4-mile
1. 40-deg timing, tire press. 16 psi, jets No. 841,0006,0001.486.69/101.2910.60/124.65
2. Tire press. 15 psi1,0006,0001.466.69/101.2610.60/124.52
3. Jets No. 841,0006,0001.446.69/101.1110.60/124.52
Best Pass Corrected 10.39/126.99
4. Jets No. 821,0006,0001.446.70/100.7110.62/124.48
5. Same1,0006,0001.456.73/100.4910.66/123.84

Strip Specs
Year/Model'70 GTO
Race Weight with Driver3,580 lbs
Curb Weight3,365 lbs
Fuel Level When WeighedFull
Fuel112-octane
Engine'74 Y4-code 455
Cubic Inches Before/After455/469
Engine Built ByThe owner
Power AdderNone

Induction System
Air CleanerK&N
CarburetorHolley, 800-cfm
JetsNo. 86 square
Spacer Plate1-in wood, open
Intake ManifoldEdelbrock Torker II, port-matched

Fuel System
PumpHolley Black, 140-gph
Lines1/2-in
RegulatorHolley, set at 8.5 psi

Heads
CastingEdelbrock, 72 cc
Head PortingJim Butler
Flow Numbers320-cfm at 0.700-in lift at 28-in of pressure
Valves2.11/1.77-in Ferrea stainless steel

Bottom End
PistonsRoss forged, 0.060-over
RingsTotal Seal, 1/16-, 1/16-, 3/16-in
RodsEagle forged steel, 6.625-in length
Compression Ratio11.5:1
CrankshaftPontiac "N" 4.210 stroke
Rotating Assembly BalancedYes

Camshaft
BrandComp Cams, solid roller
Duration at 0.050272/276-deg
Duration Advertised304/308-deg
Lift with Specified Rocker Arms0.609/0.609-in
Lobe Separation Angle108-deg
Installed Position104-deg
Rocker ArmsScorpion rollers 1.65:1/1.5:1

Ignition
DistributorMSD Pro-Billet
AmplifierMSD 6AL + start/retard control
CoilMSD Blaster
WiresMSD 8.5mm
Spark PlugsAutolite 3924
Total Timing40-deg
Rpm That Total Timing Is Reached2,000

Exhaust
HeadersHooker Super Comp
Primaries2.00-in
Collectors3.50-in
Exhaust Pipes3.50-in
MufflersDynaflow
CrossoverNone

Drivetrain
TransmissionTurbo 400
Converter8-in ATI, 4,000-rpm stall
ShifterHurst Quarter Stick
RearGM 12-bolt
Rear Gear Ratio4.10:1
SpoolMoser
AxlesMoser, 30-spline

Chassis and Suspension
Brakes F/RDisc/Drum
Wheels F/RCenterline Auto Drag 15x3.5/15x10
Tires F/RHoosier 28x4.5x15 / 30x10.5x15
Tire Pressure F/R40 psi/13 psi
Suspension Front
SpringsNAPA LeMans six-cylinder springs
Control ArmsStock
Stabilizer BarNone
ShocksSummit 90-10
Suspension Rear
SpringsStock
ShocksNAPA, gas-charged
Stabilizer BarStock, 0.875-in
Other FeaturesLakewood traction bars
Chassis Mods8-point S&W rollbar

The Rest
Interior ModsPoly race seats with covers/rear seat removed
Exterior ModsFiberglass hood and front bumper
Safety ModsSFI-approved drivetrain parts, cut-off switch,
blanket-on transmission, driveshaft safety loop
ColorCardinal Red
Launch TechniqueIdle, lift left foot, push right foot
Best 1/8-mile E.T./MPH Prior to Event6.537/103.59
Best 1/4-mile E.T./MPH Prior to Event10.34/128.21


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