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Owner Bio: Larry Vartanian
"This was the first car I raced both on the track and the street (at the time it belonged to my uncle)," Larry tells HPP. "It always had that smooth and comfortable ride, so I was hooked on the big boat immediately." A mechanic by trade, Larry works on customer's performance vehicles and Ford prototypes at Livernois Vehicle Development/Motorsports. "I work on performance cars and trucks to keep my sanity," he explains. Though just 33 years old, Larry has been racing for 16 years and has owned an impressive number of Pontiacs, including 11 '69-'72 Grand Prixs, a '77 Trans Am, a '79 Formula, 2 '79 Trans Ams, a '72 LeMans, a '78 Firebird, an '86 Grand Am, and '84 and '85 Grand Prixs. | STRIP SPECS | | Year/Model: | '71 Grand Prix | | Race Weight: | 4,025 lbs | | Curb Weight: | 3,865 lbs | | Type of Fuel: | Turbo Blue 110-octane | | Engine: | '74 455, code YH | | Cubic Inches Before/After Bore: | 455/469 | | Built By: | Owner | | Carburetor: | Holley HP 1,000-cfm, #78/#84 jets | | Spacer Plate: | 3/8-inch, aluminum, open, GM Holley carb heat shield | | Intake Manifold: | Edelbrock Performer RPM, port matched | | Fuel System: | Mallory Comp 250 electric pump, -8-in line, Mallory 5-port reg. set at 8 psi, sumped factory tank | | Heads: | '69 #62, race port by Butler | | Flow Numbers: | 250 cfm at 0.600 lift intake, exhaust is approx 75% of intake flow | | Valves: | Ferrea 6000 Competition, 2.11/1.77 | | Pistons/Rings: | TRW forged flat-top 0.060/Sealed Power moly, file-fit | | Rods: | Eagle forged-steel, pressed-pin, 6.625-in | | Compression Ratio: | 12.1:1 | | Crankshaft: | OEM cast-iron 4.210 stroke | | Rotating Assembly Balanced: | Yes | | Camshaft: | UltraDyne, solid, flat-tappet | | Camshaft Specs: | 264/266-deg duration at 0.050, 0.601/0.630 lift | | Camshaft LSA: | 108-deg | | Camshaft Centerline: | 110-deg | | Installed Position: | Straight up | | Rocker Arms: | Comp Cams roller, 1.65:1 | | Ignition: | MSD Pro-Billet dist, MSD 6AL, MSD HVC coil, MSD wires, NGK UR5 plugs | | Total Timing: | 34-deg total all in by 2,400 rpm | | Exhaust: | Hedman Hedders, 1.75-in primary, 3-in collectors, 3-in pipes, X-type crossover, Dynomax Ultra Flo mufflers | | Power Adder: | None | | Transmission: | Turbo-400, performance-built, reverse-manual valvebody | | Converter: | Continental 10-in, 3,800-rpm stall | | Shifter: | B&M Mega Shifter | | Rear: | 12-bolt, Eaton posi with 800lb spring kit, 4.10:1 Richmond gears, Moser 30-spline axles, Ford 9-in big bearing ends | | Brakes F/R: | OEM 10.9 disc, braided flex hoses/OEM 9.5-in drum, 15/16 wheel cyls | | Wheels F/R: | Weld Prostars 15x7/15x10 | | Tires F/R: | Goodyear Eagle 205/70R15 / M/T ET Street 28x12.50x15 | | Tire Pressure F/R: | 35 psi/13 psi | | Suspension Fr: | Lakewood drag shocks, urethane bushings, stock replacement springs, 0.875-in stabilizer bar (loose) | | Suspension Rr: | Dick Miller Racing adj. upper arms 3.5-deg. pinion angle, 4130-moly lowers w/nylon bushings, modified factory upper crossmember brace, airbags (right, 10 psi; left, 4 psi) | | Chassis Mods: | 4130-moly 8-point rollcage | | Interior Mods: | Full interior custom recovered seats, HVAC removed, gauges mounted in dash, removed console | | Exterior Mods: | Custom paint | | Safety Mods: | Rollcage, 2 driveshaft loops, driver and passenger RJS 5-point cam-lock belts, Denny's driveshaft, 1350 U-joints | | Paint: | Laurentian Green, green pearl flames | | Launch Technique: | Footbrake to 2,800-3,000 depending on track conditions | | Best ET/MPH Prior to Event (1/4-Mile): | 11.58 at 118 mph, 1.55 60-ft |
| Strip Tuning Log | | Run | Tuning | Launch RPM | Shift Point | 60-FT | 1/8 E.T./MPH | 1/4 E.T./MPH | | 1 | 13 psi in tires | 2,800 | 5,800 | 1.72 | 7.62/90.67 | 12.01/111.23 | | 2 | Same | 2,800 | 5,800 | 1.65 | 7.55/90.44 | 11.93/111.30 | | BEST PASS CORRECTED | 11.36/116.94 | | 4 | Same | 2,800 | 5,000/6,000 | 1.63 | 7.54/90.38 | 11.93/111.07 | | 6 | Same | 2,800 | 6,200 | 1.68 | 7.58/90.89 | 11.95/111.90 | | 7 | Same | 2,800 | 5,600 | 1.69 | 7.61/90.57 | 11.97/112.20 | | The five most important runs are listed in the order they occurred. | | Run Notes: 1) Spun tires |
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