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Pontiac Pavement Pounders Shootout - Pontiac Heaven/Speedworld Motorplex Edition

Pavement Pounders Speedworld Motorplex 1969 GTO Launching Pavement Pounders Speedworld Motorplex Matthew Luster Pavement Pounders Speedworld Motorplex 1969 GTO Engine Bay
STRIP TUNING LOG
Run/TuningLaunch RPMShift Pt.60-ft1/8-mile1/4-mile
1. 22 psi in tires2,0006,0002.619.17/84.9513.77/107.22
2. 19 psi in tires1,0006,0001.878.23/86.2012.78/107.83
BEST PASS CORRECTED12.25/112.54
3. Same1,5006,0001.858.21/85.8712.79/106.82
4. 18 psi in tires1,5006,0001.878.24/85.9012.81/107.31
5. 19 psi in tires1,5006,0001.878.30/84.7212.95/103.72
Top 5 runs are listed in the order that they occurred.
Run Notes: 1) Posi seems to be slipping, blew tires off; 2-5) Posi slipping.

STRIP SPECS
Year/Model: '69 GTO
Race Weight: 3,940 lbs, weighed at Firebird Raceway
Curb Weight: 3,600 lbs, weighed at Firebird Raceway
Fuel Level: 1/4-tank
Fuel: VP red, 105-octane, leaded for track,92-octane for street
Engine: '72 455, YC-code,+0.030
Cubic Inches Before/After: 455/462
Engine Built By: Owner and Allen Hartman, block machine work by Beck Racing Engines in Phoenix, AZ
Power Adder: None
Top End
Air Cleaner: K&N 14x3-in, K&N X-Stream airflow lid
Carburetor: Edelbrock #1407, 750-cfm, manual choke
Jets, Primary/Secondary: 0.113/0.107
Metering Rods: 0.065x0.037, 3-in. Hg step-up spring (blue)
Spacer Plate: None
Intake Manifold: Edelbrock Performer RPM, port-matched by Dean Turk Performance in Mesa, AZ
Fuel Pump: AC stock replacement
Lines: 3/8-in
Regulator: None
Heads: '68 #16 D-port
Head Porting: Multi-angle valve job, and port and chamber work by Dean Turk Performance
Flow Numbers: N/A
Valves: Stock 2.11/1.77
Bottom End
Pistons: H-O Racing, forged, dished, 0.030 over
Rings: Sealed Power, Moly
Rods: Stock cast, refurbished, 6.625-in, ARP rod bolts
Compression Ratio: 10.5:1
Crankshaft: Stock Pontiac 455, 4.21 stroke, turned 0.020/0.010, micro-polished, ARP main studs
Rotating Assembly Balanced: Yes
Camshaft
Brand: Comp Cam hyd. flat tappet
Duration at 0.050: 246/253-deg
Duration Advertised: 296/305-deg
Lift with Specified Rocker Arms: 0.517/0.532
Lobe Separation Angle: 108-deg
Installed Position: Straight up
Rocker Arms: Comp Cams Magnum roller tip 1.52:1
Ignition
Distributor: Mallory Comp 9000 Unilite
Amplifier: Mallory HyFire IV C
Coil: Mallory Promaster
Wires: MSD Helicore 8mm
Spark Plugs: AC R43S
Total Timing: 35-deg
RPM Total Timing is Reached:3,200
Exhaust
Headers: Hooker Super Comp, Jet Hot coated
Primary: 1.75x28-in
Collector: 3-in
Exhaust: 3-in
Mufflers: Flowmaster, two-chamber, 3-in
Crossover: None
Drivetrain
Transmission: Turbo 400, TransGo shift kit, performance built by Kelly's Transmission in Albuquerque, NM
Converter: Hughes GM25, 2,500-rpm stall
Shifter: Hurst His and Hers from a '68 GTO
Rear: Moser Engineering Ford 9-in
Rear Gear Ratio: U.S. Gear 4.11:1
Posi: Auburn Pro Series
Axles: Moser Engineering 31-spline
Chassis and Suspension
Brakes F/R: Stock 10.9-in disc/9.5-in drum, power assist
Wheels F/R: Cragar Superlite II 15x7/15x8
Tires F/R: BFG T/A 215/65R15 / Hoosier Quick Time Pro 27x11.5x15LT
Tire Pressure F/R: 35 psi/18 psi
Suspension Front
Springs: Stock
Control Arms: Stock
Stabilizer Bar: Stock 1.00-in
Shocks: Gabriel Pro Ryder, gas
Suspension Rear
Springs: Stock
Control Arms: Stock
Stabilizer Bar: None
Shocks: Gabriel Pro Ryder, gas
Other Features: Airbag, right side, 4 psi
Chassis Mods: None
The Rest
Interior Mods: Auto Meter gauges (underdash) and shift light
Exterior Mods: None
Safety Mods: Lakewood driveshaft loop
Paint: Antique Gold
Launch Technique: Footbrake to 1,500-2,000 rpm depending on track conditions
Best 1/8-mile ET, MPH Prior to Event: 8.06/87.96
Best 1/4-mile ET, MPH Prior to Event: 12.51/110.65


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