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Pontiac Pavement Pounders Shootout - Lone Star Edition, Part III

0503Hpp Shoot17 Z
0503Hpp Shoot18 Z 0503Hpp Shoot19 Z 0503Hpp Shoot20 Z
Strip Specs
Year/Model:'68 Firebird convertible
Race Weight:4,040 lbs
Curb Weight:3,820 lbs
Fuel Level:1/2-Tank
Type of Fuel:92-Octane Texaco
Engine:'69 428
Cubic Inches Before/After: 428/462
Built By:Shawn Patterson
Carburetor:Holley 850 DP, #78/#88 jets
Spacer Plate:1"
Intake Manifold:Performer RPM
Fuel System:110 gph Holley, stock 3/8" line, firewall forward #6 AN line to Holley regulator (set to 7.5 psi) and to carb
Heads:6X-4, ported, 2.11/1.77 Ferrea valves
Flow Numbers:240-/192-cfm at .500 lift at 28" of water
Pistons/Rings:SRP forged flat-top/Total Seal
Rods: Stock cast, resized
Compression Ratio: 9.5:1
Crankshaft:Stock 455 nodular-iron (4.210" stroke) cut .010/.010
Rotating Assembly Balanced:Yes
Camshaft:Comp Cams, hydraulic, 230°/236° at .050, .536/.540 (with 1.65:1 rockers), 110° LSA
Installed Position:Straight up
Rocker Arms:Crane roller, 1.65:1
Ignition:HEI, MSD 6AL
Total Timing:32° at 2,200 rpm
Exhaust:Hooker headers, 1.75" primaries, 3" collectors, 2.5" Flowmaster system with crossover and mufflers
Power Adder: None
Transmission:Turbo 400 previously built, refreshed by Patterson Garage, B&M shift kit
Converter: 10" TCI/JBP, 3,000 rpm stall
Shifter: Modified T/A ratchet style
Rear:Chevy 10-bolt Posi, 3.08 gears
Brakes F/R:Stock 10.9" disc/9.5"drum
Wheels F/R:15x7 Rally II/15x8 strip
Tires F/R: BFG 235/60-15 / 26x 12.50x15 M/T ET Street
Tire Pressure F/R:35 psi/20 psi
Suspension Fr:Stock, Addco 1 1/4" stabilizer bar, Monroe Gasmatic shocks
Suspension Rr:5-leaf springs, Chassis Eng. traction bars, Monroe Gasmatic shocks
Chassis Mods:Replaced stock convertible floor reinforcement with a fabricated X-brace under car to fit exhaust
Interior Mods:None
Exterior Mods:None
Safety Mods:None, factory seat belts
Paint:Black
Launch Technique:Footbrake 2,000 rpm
Best E.T., MPH Prior to Event:12.90/105

Strip Tuning Log
RunTuningLaunch RPMShift Point60-FT1/4 E.T./MPH
1As arrived2,0005,4001.8913.06/104.73
2Tires 18 psi, temp 180°2,0005,4001.8912.99/104.98
336° Timing, no vacuum adv.2,0005,4001.9012.99/104.89
4Added 3-gal 110-octane2,0005,2001.9413.08/104.38
7Same1,5005,4001.9012.98/104.88
Five most important runs are listed in the order that they occurred.


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