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Pontiac Pavement Pounders Shootout - Norwalk Raceway Park Part 4

Pavement Pounders Shootout Norwalk 1970 Gto Roasting The Tires Pavement Pounders Shootout Norwalk Jim Gnadt Pavement Pounders Shootout Norwalk 462Ci 455 Block Pontiac
STRIP SPECS
Year/Model: Full tube-chassis '70 GTO
Race Weight: 2,715 lbs
Curb Weight: 2,415 lbs
Fuel Level: 3/4-full, custom aluminum 4-gal cell by owner
Fuel: 110-Octane Sunoco Racing
Engine: '73 455
Cubic Inches Before/After: 455/462
Engine Built By: Owner, machining by Engine Assembly, Rochester, NY
Power Adder: NOS fogger, 0.024 NOS/0.022 fuel jets, 10# bottle
Top End
Air Cleaner: None
Carburetor: Two Holley/Proform 750 DP
Jets, Primary/Secondary: #80/#80
Spacer Plates: Custom by owner, 1-in aluminum, 4-hole
Intake Manifold: Custom sheetmetal tunnel ram (by owner)
Fuel Pump: Magnafuel Quickstar 300 electric
Lines, Size: -10 AN to regulator, -8 to carbs
Regulator: Two Magnafuel, 6 psi for carbs, 10 psi for NOS
Heads: Edelbrock 72cc
Head Porting: Yes, by owner
Flow Numbers: 334/241 cfm at 0.700 lift, 28-in pressure
Valves: Custom Manley SS, 2.125/1.770
Bottom End
Pistons: Custom Wiseco forged flat-top, 4.181-in
Piston Pins: 0.990-in diameter, floating
Rings: Total Seal Gapless 0.062/0.062/0.188
Rods: Crower Sportsman forged-steel, 6.625-in length
Compression Ratio: 11.25:1
Crankshaft: Stock nodular 4.210-in stroke
Rotating Assembly Balanced: Yes
Camshaft
Brand: Comp Cams solid roller
Duration at 0.050: 270/282-deg
Duration Advertised: 304/320-deg
Lift with Specified Rocker Arms: 0.635/0.635
Lobe Separation Angle: 110-deg
Installed Position: 106-deg
Rocker Arms: Comp Cams 1.65:1
Ignition
Distributor: Stock w/bronze gear, MSD cap and rotor
Amplifier: MSD 7AL3
Coil: MSD Blaster 3
Wires: MSD 8.5 mm
Spark Plugs: AR3932
Total Timing: 34-deg locked, retarded 4 deg for NOS
Exhaust
Headers: Custom by owner with Swain Technology thermal barrier
Primaries: 2.00/2.125/2.250-in stepped, 29-in primary tube length
Collectors: 4.00-in
Drivetrain
Transmission: Turbo 400, ATI input shaft and direct drum, Griner brake
Converter: Competition Transmission 9-in, 5,600-stall (6,100-stall with NOS)
Shifter: B&M Pro Ratchet, Shiftnoid electric shifting system
Rear: Mark Williams 9-in center, Fab-9 moly housing, Strange axles
Rear-Gear Ratio: 4.29:1
Spool: Mark Williams 35-spline
Chassis and Suspension
Brakes F/R: Wilwood Dynalite disc 10.5-in/11.00-in
Wheels F/R:Centerline Warrior 15x4/15x15
Tires F/R: Metric hi-speed radial/Goodyear 33.5x15 slicks
Tire Pressure F/R: 35 psi/7.5 psi
Suspension Front
Type: Strut, RJR rack & pinion
Springs: QA1 450 lb/in
Control Arms: Strange
Stabilizer Bar: None
Struts: Strange adjustable, set at middle of range
Suspension Rear
Type: 4-link by owner
Springs: QA1 130 lb/in
Locator: Wishbone
Control Arms: Moly tube 1.25-in
Antiroll Bar: Competition Engineering 1.125-in
Shocks: Koni double-adjustable coilovers set at middle of range
Other Features: Custom wheelie bars by owner
Chassis: Full tube, (mostly 15/8-in diameter) chrome-moly to SFI 25.4, by owner
The Rest
Interior Mods: Aluminum sheet by owner
Exterior Mods: RJR Scoop, custom rear airfoil by owner
Safety Mods: Tube chassis, SFI-approved ATI super damper and other drivetrain parts, RCI 5-point harness, Safetycraft Halon fire system, Simpson parachute
Paint: Black by Norm Dillon, Macedon, NY
Launch Technique: 5,000 rpm from transbrake w/o NOS
Best 1/8-mile ET, MPH Prior to Event: 5.37/129.51 mph
Best 1/4-mile ET, MPH Prior to Event: 8.42/161.34 mph

STRIP TUNING LOG
RunTuningLaunch RPMShift Pt.60-ft1/8-mile1/4-mile
1. Density alt. 3,504 6.5-psi in tires, mistakenly left floats set too low5,0006,7001.295.57/129.898.67/154.72
2. Density alt. 3,667 adjust floats higher, 6.75 psi in tires5,0006,7001.265.52/130.178.61/155.49
3. Density alt. 3,705 6.75 psi in tires5,0006,7001.265.52/130.028.61/156.90
4. Density alt. 3,426 7 psi in tires5,0006,7001.255.49/130.628.58/155.24
BEST PASS CORRECTED*8.22/162.02
Run Notes: 1) Bogged the end of first gear, loose track at top end; 2) No bog this time, top end still loose; 3) No changes to car, nearly identical run to last; 4) More tire pressure.*calculated for 3,400-foot density altitude


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