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1966 Pontiac GTO, 1968 Pontiac LeMans Convertible - Shootout - Pavement Pounders
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| STRIP TUNING LOG |
| Run/Tuning |
Launch RPM |
Shift Pt. |
60-ft. |
1/8-mile |
1/4-mile |
| 1. 10-deg initial timing, |
1,500 |
5,800/5,400 |
1.82 |
7.89/87.94 |
12.33/111.23 |
| 33-deg total timing, |
| 20 psi ET Street tires, |
| #78/#86 jets |
| 2. Same |
1,500 |
5,500 |
1.80 |
7.86/88.90 |
12.28/111.26 |
| 3. #85/#92 jets |
1,500 |
5,500 |
1.78 |
7.79/88.80 |
12.25/109.94 |
| 4. 35-deg timing |
1,500 |
5,500 |
1.79 |
7.80/88.98 |
12.23/110.76 |
| 5. Changed cap and rotor, 15-deg initial timing |
1,500 |
5,500 |
1.77 |
7.76/89.01 |
12.19/110.47 |
| BEST PASS CORRECTED |
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11.86/113.59 |
| Run Notes: 1) No spin at launch, laid down in top of first gear; 2) Added five gallons of gas; 4) Felt good. |
Owner Bio: Mike Silver
Mike, a 39-year-old Chrysler lab technician, has been racing for 20 years. He bought his '68 LeMans in 1991 because, "Its body was in better shape than my previous Pontiac, a '67 LeMans," he says. It's special to him because, "I've done all the work myself." His favorite moment in it was letting his wife race it once at Bunker Hill Dragstrip in Bunker Hill, Indiana. Mike has always been drawn to the LeMans bodystyle. In addition to his race car, he currently owns a '78 Grand LeMans, and at one time, he also had a '73 LeMans in his collection.
| STRIP SPECS |
| Year/Model: |
'68 LeMans convertible |
| Race Weight With Driver: |
3,925 lbs |
| Curb Weight: |
3,750 lbs |
| Fuel Level When Weighed: |
1/2-tank |
| Fuel: |
93 octane |
| Engine: |
'73 400 |
| Cubic Inches Before/After: |
400/455 |
| Engine Built By: |
Assembled by owner, |
|
machine work by Cohee Performance |
| Induction System |
| Air Cleaner: |
K&N 3-inch with X-stream airflow lid |
| Carburetor: |
Holley Street Avenger, 870-cfm |
| Jets: |
#78/#82 |
| Spacer Plate: |
1/2-inch, phenolic, open |
| Intake Manifold: |
Torker II |
| Fuel System |
| Pump: |
Holley Blue |
| Lines: |
#8 |
| Regulator: |
Mallory three-port return to tank, set at 7 psi |
| Heads |
| Casting: |
Edelbrock 87cc |
| Head Porting: |
Yes, by owner |
| Flow Numbers: |
284/224 cfm |
| Valves: |
Manley 2.11/1.77-in |
| Bottom End |
| Pistons: |
TRW, 4.15-in |
| Rings: |
Sealed Power, file-to-fit, 5/64 top, 1/16 second, 3/16 oil ring |
| Rods: |
Stock, 6.625-in length, beams ground |
| Compression Ratio: |
11.0:1 |
| Crankshaft: |
Eagle 455 with 3.00 mains from 400 block |
| Rotating Assembly Balanced: |
Yes |
| Camshaft |
| Brand: |
Comp Cam solid-roller |
| Duration at 0.050: |
264/270-deg |
| Duration Advertised: |
294/306-deg |
| Lift With Specified Rocker Arms: |
0.682/0.660-in |
| Lobe Separation Angle: |
106-deg |
| Installed Position: |
4-deg advanced |
| Rocker Arms: |
Harland Sharp, 1.65-ratio |
| Ignition |
| Distributor: |
MSD |
| Amplifier: |
MSD 6AL |
| Coil: |
MSD Blaster 3 |
| Wires: |
MSD Super Conductor 8.5 mm |
| Spark Plugs: |
Champion RC12YC |
| Total Timing: |
36-deg |
| Rpm that total timing is reached: |
3,000 |
| Exhaust |
| Headers: |
Hooker |
| Primaries: |
2-in |
| Collectors: |
3.5-in |
| Exhaust Pipes: |
2.5-in |
| Mufflers: |
No-name turbo mufflers |
| Crossover: |
H-pipe and exhaust dumps |
| Drivetrain |
| Transmission: |
Turbo 400 |
| Converter/Clutch: |
TCI Street Fighter, 10-in, 3,200 stall |
| Shifter: |
Hurst Quarter Stick |
| Rear: |
12-bolt |
| Rear Gear Ratio: |
3.42:1 |
| Posi: |
Stock |
| Axles: |
Moser 30-spline with Ford-type housing ends |
| Chassis and Suspension |
| Brakes Front: |
GM disc brakes, 11-in rotors, |
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73mm single-piston calipers |
| Brakes Rear: |
Stock size drum, with aluminum drums |
| Wheels: |
Cragar Superlite 15x5 / Weld Draglite 15x10 |
| Tires: |
BFG Radial T/A 215/70R15 / MT Drag Radials 295/65-15 |
| Tire Pressure: |
F/R: 35 psi /17 psi |
| Suspension Front |
| Springs: |
Aftermarket handling springs, cut 1/2 coil |
| Control Arms: |
Stock |
| Stabilizer Bar: |
1.125-in |
| Shocks: |
Comp Engineering 90/10 adjustable |
| Other Features: |
None |
| Suspension Rear |
| Springs: |
'78 G-body |
| Control Arms: |
Edelbrock adjustable upper, |
|
boxed stock lowers with poly bushings |
| Stabilizer Bar: |
None |
| Shocks: |
Auto Zone gas |
| Other Features: |
No-hop bars, right side air bag set to 17 psi |
| The Rest |
| Interior Mods: |
None |
| Exterior Mods: |
No emblems |
| Safety Mods: |
Driveshaft loop, five-point racing harnesses, |
|
six-point rollbar |
| Color: |
Quasar Blue Metallic Launch Technique: |
| Foot brake to 1,500 rpm, floor it on last yellow |
| Best 1/8-mile ET/MPH prior to event: |
7.30 / 92.01 |
| Best 1/4-mile ET/MPH prior to event: |
11.58 / 115.44 |
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