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Old 06-14-2006, 05:35 PM
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Shock rating, Im confused.

I never really understood the rating system for shocks.
50/50 90/10 ect.
What do these numbers mean and how would I select the best rate for my application?

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Old 06-14-2006, 06:24 PM
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Shock Ratings

They are realy not "Ratings". They simply tell you how much damping you get on the compression and the extension of the shock. 50/50 or 50% when the shock is cmpressed (you go over a bump) and 50% when you extend the shock (you hit a pothole) is standard for a shock.

90/10's are for the front of a drag car. Only 10% damping when the shock extends allowing the front of the car to raise easily when you accellerate, then 90% on the way back down holding the nose in the air keeping weight on the rear tires for traction.

Never run 90/10's on the street.

Many many years ago I tried. Don't ask me how I know it's bad, I just do. Of course, that was about the same time I married my wife, so maybe it was major brain malfunction time for me. Anyway, don't do it. (Use 90/10's that is. You can marry my wife if you want to and it will probably save you a stint in pergutory if you've been bad.)
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Old 06-14-2006, 07:16 PM
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Quote:
Originally Posted by WildBill
Many many years ago I tried. Don't ask me how I know it's bad, I just do. Of course, that was about the same time I married my wife, so maybe it was major brain malfunction time for me. Anyway, don't do it. (Use 90/10's that is. You can marry my wife if you want to and it will probably save you a stint in pergutory if you've been bad.)
^^quite possibly the best response i have read in a long time

Chris
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Old 06-14-2006, 08:09 PM
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Most passenger car shocks will have more dampening on the extension stroke and something less on the compression stroke. The reason for this is that the spring in the suspension while compressing will take some of the load and will actually help extend the shock when the spring 'returns' to its normal state. You want more damping on the extension stroke in this situation because the spring will be helping to extend the stroke and you don't want that to happen too fast - so you need to slow that down with more damping than the compression stroke. I believe a typical passenger car shock may have a ratio something like 70/30 - each application is different but many are in this ballpark. You can actually feel this with a new shock in your hand - it will compress easier than it will extend.

The only place I have ever seen a 50/50 shock is in a steering damper application (doesn't mean they are not used in a suspension application but I have not one across one yet - it would likely be a special application).

Good luck to you.
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