jshepard

I'm in

7800-8000 rpm . Could be crap in carbs. Change plugs

A TECHNICAL DESCRIPTION OF HOW SHOCKS WORK FROM MONROE Let's start our discussion of shock absorbers with one of very important point: despite what many people think, conventional shock absorbers do not support vehicle weight. Instead, the primary purpose of the shock absorber is to control spring and suspension movement. This is accomplished by turning the kinetic energy of suspension movement into thermal energy, or heat energy, to be dissipated through the hydraulic fluid. Shock absorbers are basically oil pumps. A piston is attached to the end of the piston rod and works against hydraulic fluid in the pressure tube. As the suspension travels up and down, the hydraulic fluid is forced through tiny holes, called orifices, inside the piston. However, these orifices let only a small amount of fluid through the piston. This slows down the piston, which in turn slows down spring and suspension movement. The amount of resistance a shock absorber develops depends on the speed of the suspension and the number and size of the orifices in the piston. All modern shock absorbers are velocity sensitive hydraulic damping devices - meaning the faster the suspension moves, the more resistance the shock absorber provides. Because of this feature, shock absorbers adjust to road conditions. As a result, shock absorbers reduce the rate of: Bounce Roll or sway Brake dive and Acceleration squat Shock absorbers work on the principle of fluid displacement on both the compression and extension cycle. A typical car or light truck will have more resistance during its extension cycle then its compression cycle. The compression cycle controls the motion of a vehicle's unsprung weight, while extension controls the heavier sprung weight.

Shock upgrade - plain and simple.  I run a full compliment of 440 shocks in my 05ss.  I did not re-valve the fronts or center shock, and made a small change on the rear.  They are a little stiff but very effective in the big stuff.  On a REV chassis the center shock is super important, and is necessary to match the rear/center shocks on the skid.  Upgrading the rear only will not make you happy.  Throwing great big springs on with the stock trail shocks will make for a serious problem with no rebound control.  shocks are not "just a damper" in a snowmobile suspension.

What do think shocks do ? They dampen and slow down motion of movement . So they are a damper. Look it up.

Go to heavier spring. The shock is a damper only does not really hold up sled.