SHOCK APPLICATION CHART, continued Make & Model
Year
Chevrolet Chevy II, Nova without H.D. Suspension with H.D. Suspension with Monoleaf Rear Springs with Multileaf Rear Springs Corvette Full Size Monte Carlo Monza Truck, Full Size
Omega Starfire Toronado
1988-68 1967-64 1967-64 1986-71 1992-77 1990-65 1979-73 1980-75 1978-71
C2600 C2600 C2600 C2600 C2600 C2605 C2610 C2610 C2610 C2600 C2600 C2616 C2615 C2600 C2600 C2610 C2610 C2610 C2600 C2600
Rear Shocks
C2720 C2720 C2705 C2700 C2720 C2720
C2700 C2720 C2700 C2720 C2720 C2720
Make & Model
Year
Pontiac Astre Bonneville Firebird
1977-75 1986-82 2002-93
Full Size Grand Am Grand Prix GTO LeMans, Tempest Sunbird
Ventura II with H.D. Suspension with Multileaf Rear Springs Isuzu Impulse Toyota Corolla Corona Mark II Corona
C2720 Celica
1986-63 1981-68 1987-69 1968-62 1973-67 1981-67 1992-76
1977-71 1973 1972-71
Front Shocks C2600 C2600 C2801* C2610 C2600 C2610 C2600 C2600 C2610 C2600 C2600 C2600
C2600
C2700 C2700 C2700 C2710 C2700 C2720 C2700 C2720 C2700 C2720 C2720
C2720 C2720 C2720 C2700
1989-83 1983-77 1976-72 1978-74 1973-65 1964-61 1977-73
Rear Shocks
C2600
SHOCKS
Vega Oldsmobile Cutlass, F85 without H.D. Suspension with H.D. Suspension Full Size Full Size Wagon
1979-74 1973 1973 1972-68 1972-68 1967-62 1982-63 1962-53 1986-65 1957-55 1988-70 1980-75 2007-88 1987-73 1977-72
Front Shocks
C2700 C2700 C2700
C2600 C2720 C2700
*90/10 Drag Strut - Not Adjustable With three set tings to choose from, which one do I start with? Determining the correct shock setting is a trial and error process. However, knowing the condition of the track surface helps. If the track is slick, you want the shocks to provide maximum weight transfer to the rear tires. A 90/10 front setting extends the shock with little effort, allowing the front end to lift quickly for maximum weight transfer — and traction — to the rear tires. By using a 50/50 setting at the rear, the rear end will "squat" easily which allows more of the car's body weight to get the tires hooked up. When track conditions are ideal, your goal is to minimize weight transfer. An 80/20 or 60/40 front setting will keep the front end from rising too high, preventing air from getting trapped under the car. HOW TO ADJUST COMPETITION ENGINEERING DRAG RACING SHOCKS 1. Fully depress shock. NOTE: When adjusting shock, keep in the upright position. 2. W ith shock still depressed, rotate indicator clockwise for several revolutions after "clicks" are heard. This action fully engages the adjustment mechanism. 3. Rotate notch indicator to desired setting. See chart below. adjustment chart – shock ratio SETTING R F XF
FRONT SHOCKS 60/40 80/20 90/10
REAR SHOCKS 50/50 40/60 30/70
Note that the three adjustments represent 360º around the shock.
The Shock Ratio represents the percentage of force required to compress the shock, compared to the force required to extend it.
The Chassis People
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