Sprint Car Auto Racing Parts | Speedmart Inc Burlington WA

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2017 Midget SpeedMart/Afco Shock Packages
2017 Midget SpeedMart/Afco Shock Packages
2017 Midget SpeedMart/Afco Shock Packages

$1,499.99

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Chassis/Track/Wing
12 Shocks (Add $440.00)
4 Shocks/3 Adjustable
11 Shocks/1 Adjustable LR (Add $540.00)
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$1,499.99
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SpeedMart has done your shock homework for you! The EDGE Midget Packages are more than just a box of shocks. Each of the Smooth Small Body Shock packages is designed to provide specific rebound and compression dampening at both low and high speed shaft velocities to maximize handling for that for specific track conditions. Each package also includes a comprehensive tuning guide that shows you exactly which shocks go together to make all four corners of your car perfect for any track conditionwhether it’s dry, slick, heavy or rough.  Visit SpeedMart Shock Tech right here for a total understanding of shock adjustment and theories.

Dirt Focus Midgets-
12 Shocks or
4 Shocks and 3 Adjustable Shocks or
11 Shocks with 1 Adjustable LR

There are two major categories of shock absorbers, which are based on the way they react to force.  Linear shocks were the standard before recent advancements in shock technology. Linear shaft velocity increases, damping forces increase at a linear rate. On a shock dyno graph (Diagram B) both compression and rebound damping appear as approximately straight lines diverging from each other as shaft velocity (or force exerted on the shock) increases. This style of shock has been a boon for racers because it allows increased control at lower shaft speeds, which is vital for controlling a race car through the corners.The third type of shock is a fairly recent development. Digressive shocks are essentially the opposite of progressives. As shaft speed increases, damping forces increase at a decreasing rate. The Diagram at the top is a shock dyno graph of a typical digressive shock dyno curve. Digressive shocks provide low-speed damping control without being unreasonably harsh on rough racetracks. Both modern linear and digressive shocks allow separate damping and rebound rates. So far manufacturers have not been able to combine, say, digressive rebound with linear compression in one shock yet. 
The Dyno Sheet
Most racing shock manufacturers adhere to a simple numbering system to describe their valvings, but don’t be fooled into thinking that you are comparing apples to apples. For example, Bilstein measures its valvings in newtons per meter while Penske uses American pounds and inches. The only way to know how shocks from different manufacturers will compare on the track is to put them on a shock dyno. Also, the dyno will tell you how a shock will behave at every velocity you are likely to see on the racetrack. Normally, shock movements associated with body roll (roll, squat, dive) in short-track racing range between zero and four inches per second.  Ruts, holes and other harsh track conditions generally fall into the six- to 12-inch range. This makes it easier to diagnose what is happening where on the dyno sheet.  Most shock dyno sheets graph shaft velocity along an axis of force exerted in both compression and rebound. The more force it takes to move the shaft a given distance, the more the shock will resist movement of the suspension either up or down. Shaft position does not affect damping. This is important to remember since a common misconception is the farther the shaft travels into the shock body the harder it is to compress. This isalmost universally untrue. The graph is a good example of a digressive shock. Notice the steep drop off in the rebound side of the shock. As the velocity increases over 1” per second, the force it takes to move the shock at that speed is linear, but in the beginning of the rebound stroke, there is a substantial amount of bleed. A great example of a sprint car/mini sprint left rear shock.



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Huge inventory of sprint car, micro sprint, midget, 600 mini sprint and mini sprint parts. Same day shipping to anywhere. Order Online or call 800-664-2788.
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