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Pontiac Pavement Pounders Shootout - Norwalk Raceway Park Part 4

Pavement Pounders Shootout Norwalk Cliff Heats His Tires Pavement Pounders Shootout Norwalk Cliff Ruggles Pavement Pounders Shootout Norwalk Under The Hood Of The Ventura
STRIP SPECS
Year/Model: '73 Ventura
Race Weight: 3,740 lbs
Curb Weight: 3,510 lbs
Fuel Level: 1/2 tank
Fuel: 89-octane
Engine: '73 455
Cubic Inches Before/After: 455/468
Engine Built By: Owner
Power Adder: None
Top End
Air Cleaner: Stock A/C
Carburetor: '77 Pontiac Q-jet, #17057274
Jets, Primary: 0.073 with 44K rods
Secondary Metering Rods: Custom machined 0.048 tips
Spacer Plate: None
Intake Manifold: '70 Pontiac iron, modified to accept a Holley carb
Fuel Pump: Mallory Comp 140
Lines: -8 AN
Regulator: Holley set to 6 psi
Heads: Kauffman 85cc aluminum "D" ports
Head Porting: None
Flow Numbers: 268/220 cfm at 28-in pressure
Valves: Ferrea SS 2.11/1.66
Bottom End
Pistons: TRW forged flat-top, 0.060 over
Rings: Speed Pro 0.060 over
Rods: Crower forged-steel 6.625-in
Compression Ratio: 10.48:1
Crankshaft: Stock "N," 4.210-in stroke
Rotating Assembly Balanced: Yes
Camshaft
Brand: Crower 60919 hyd.
Duration at 0.050: 231/240-deg
Duration Advertised: 304/314-deg
Lift with Specified Rocker Arms: 0.530/0.530
Lobe Separation Angle: 113-deg
Installed Position: 109 ICL
Rocker Arms: Crane roller 1.73:1
Ignition
Distributor: Pontiac HEI
Amplifier: Mallory w/adj rev limiter
Coil: Stock
Wires: Stock
Spark Plugs: NGK R5671A-7
Total Timing: 30-deg
RPM Total Timing is Reached:3,000
Exhaust
Headers: Hedman
Primaries: 1.75-in
Collectors: 3-in
Exhaust Pipes: 3-in head, 2.5-in tails
Mufflers: Flowmaster 2 chamber
Crossover: 3-in H-pipe
Drivetrain
Transmission: Turbo-400, TransGo shift kit, 6 friction plates in fwd and direct clutch packs, 36-element sprag
Converter: Continental "Jim Hand" 10-in, approx. 3,500-rpm stall
Shifter: Stock
Rear: '73 8.5-in 10-bolt
Rear-Gear Ratio: 3.42:1
Posi: Eaton
Chassis and Suspension
Brakes F/R: Stock 10.9-inch disc/9.5-in drum
Wheels F/R: Pontiac Rally wheels 15x7
Tires F/R: BFG 225/70-15s / Mickey Thompson 275/60-15 drag radials
Tire Pressure F/R: 40 psi/18 psi
Suspension Front
Springs: Stock
Control Arms: Stock
Stabilizer Bar: Removed
Shocks: CE drag racing, adjustable set at 90/10
Suspension Rear
Springs: Custom "Super Stock" leafs
Stabilizer Bar: None
Shocks: Summit set at 50/50
Other Features: Custom adj. pinion snubber set to 1-inch clearance
Chassis Mods: Welded-in subframe connectors
The Rest
Interior Mods: None
Exterior Mods: '74 GTO hood/shaker assembly
Safety Mods: Driveshaft loop, bolt-in axles
Paint: Lucerne Blue
Launch Technique: 1,100-1,300 rpm
Best 1/8-mile ET, MPH Prior to Event: 7.38 at 93
Best 1/4-mile ET, MPH Prior to Event: 11.64 at 115.30

STRIP TUNING LOG
RunTuningLaunch RPMShift Pt.60-ft1/8-mile1/4-mile
1. 30-deg timing, 0.040 rods, 1-in spacerIdle5,1001.777.73/90.2912.11/111.80
2. Same, 0.048 rodsIdle5,1001.77.58/91.0011.93/112.64
3. Same, no spacer1,1005,1001.697.56/91.1911.89/113.21
4. Same, 0.052 rods1,1005,1001.77.56/91.5511.88/113.27
BEST PASS CORRECTED11.31/119.01
5. Same, swapped in NHRA-legal stock Elim carb 7041273, 0.068 pri. jets, no pri. rods, cust machine 0.040 rear rods, no power piston1,1005,1001.77.57/91.1711.91/112.75
6. Same, swapped in Tomahawk intake, 0.052 rods1,1005,1001.757.64/91.2911.97/113.60
7. Same1,3005,1001.747.64/90.7911.99/112.99
8. Same, 1-in spacer added1,3005,1001.787.64/91.9211.94/114.07
9. Same, 0.048 rodsIdle5,1001.767.60/92.0911.89/114.17
Run Notes: 1) Bogged on launch, felt heavy; 2) Slight bog, pulled well; 3) No bog, pulled strong; 4) No bog, clean run; 5) No bog, clean run; 6) No bog, pulled strong on top end; 7) No bog, clean run; 8) Sluggish on launch, pulled hard on top end; 9) Slow off line, strong top end.


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