Ride quality

How to Improve car/truck ride quality with Firestone`RIDE-RITE` Air Spring Kit Modified

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• published: 15 May 2012
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How-to (DIY) improve the ride quality on truck and cars. This video will motivate you into performing any car or truck suspension ride quality and Increase pay-load(GVW= gross vehicle weight) capacity. Firestone Air Ride Kit # 2250(FREE) is a GM,FORD,DODGE application modified for Nissan Frontier 4x4.. The RIDE-RITE rear air springs will improve ride and handling, increase traction, and reduce suspension fatigue. The adjustable spring have individual inflation valve so it can level the truck when carrying off-center loads. The air spring mount between the suspension and frame rail and are rated at 5000 lbs/set. The Firestone Air Spring are modified for custom installation. APPLICATION: 2003 NISSAN FRONTIER EX, Xterra 4x4 since rear leaf spring are also used to transmit acceleration and brake force, their positioning and configuration is more critical. These forces cause the axle housing to twist, and in doing this, the leaf spring tend to wrap-up and distort. To counteract this condition, it is necessary to increase the spring rate. This conflict is solved by adding leaves only to the front of the leaf spring, which provide the spring with the stiffness in the front half it needs to resist the axle torque reaction while not increasing the spring rate as much as if a full leaf was added. Most leaf springs used on high performance cars have extra leaves only on the front of the spring of the spring for this reason. spring and shock are an intergral part of any suspension system must be considered as a coordinated package, so just changing spring and/or shocks will not always give the desired result. What works on one car might not work on another car because of difference in their system design. calculation leaf spring rates is determined by the spring's physical dimensions. The spring rate of a leaf spring can be approximated with this formula: Leaf spring rate = (wn/12) x (1000t/L) 3 W = Width of leaves(inches) N = Number of leaves T = Thickness of 1 leaf ( in inches) L = Lenght of spring (in inches) 12 = A constant for all leaf spring for example, assume the following specification: W=3.00 in , N=5.0 , T=.25 in. , L=60in. plugging these number into the formula result in : leaf spring rate = 3.00 x 5 /12 x (1000×.25/60) 3 Leaf spring rate = 1.25 x (4.17) 3 Leaf spring rate = 90lbs-in. All of the above is good background information, but in the end you have to make the decision on which spring to use on your car. Understanding all of the factors involved will help make that decision, as well as help to rationalize the spring you are already using. The following are some of the factors that should be considered in choosing spring for your car. Aerodynamic effects some race cars, like indy racers, can have aerodynamic downforce that is greater that the weight of the car. If you have a 2000lbs. Car with 2000lbs. Of downforce, you will need spring rate and spring loads twice as high as if there were no aerodynamic downforce. A stock body car on a 1/4 mile track does not have much aerodynamic downforce, but some modified cars do have a considerable amount. spring rates left-to-right, circle track cars will have a large percentage of their weight transferred to the right side of the car during cornering. Since the effective weight on the right side is increase, it following that more spring rate and spring load will be required. Keeping softer spring rate on the left side is a popular choice, providing it doesn't upset the overall balance of the car. Road-racing and street-driven cars usually use the same spring rate and spring loads from side-to-side because they run around both left- and right-hand turns. effects of too much spring rate, since most race cars can adjust the spring load to set the correct ride height, choosing the best spring rate is usually of the most concern to racers. We have discussed reason why more spring rate might be desired, but how do you know if you have too high a spring rate? In general, it is best to run as soft a spring rate as possible. The traction between a car's tires and the road is the only source for developing cornering power. If the tire are not in contact with the road, they develop zero cornering power. Soft spring rate allow the tire to better follow road bump and irregularities so the tire stay in contact with the road a higher percentage of the time. Higher spring rates can also limit suspension in both the bump and rebound direction. If your car is not getting full suspension travel, it might not be allowing the tires of follow the road as much as possible. Variable rate spring - study of the optimum spring rate for a car eventually come to the conclusion that the best spring rate is a variable one. We would like to have a soft spring rate to absorb the road irregularities and then have a high spring rate to absorb the larger bumps. Spring are available that are made with a variable rate.