Whats the best method to go about tuning single adjustable (rebound) shocks? Now that I've got my car on the road, I'm going through the process of dialing in brakes, suspension, etc. Right now I've got all 4 set in the middle (6 of 12 clicks)...any input on the best way to go about testing and tuning would be greatly appreciated.

Thanks,
Greg

 

I think it all depends on how you want your car to ride/handle. But you do need to let the springs do their job. I turn mine until I had a washboard ride, then dialed back from there.

 

Makes sense.... I read somewhere to start in the middle and go for a drive. Then go full soft and take the same drivel. Then repeat on full firm. From that you should be able to determine at least what half of the adjustment spectrum you want to be in, and then you can adjust from there.

Given that my springs are the stock small block units, do most keep the rebound set the same at all 4 corners, or is there a benefit to being stiffer/softer front to rear?

Thanks!

 

My experience with Koni's is that the rear was a little stiffer to avoid bounce at the back end. The fronts were slightly softer but not much. Now with that said I race and drive 911's on the street that from the factory will knock teeth lose so I like a stiff ride. It really is just personal preference for the street and how it fits your driving style. In racing it's what makes you faster! Have fun.

Steve

 

I have a good test road a couple of miles from my house. It has a couple of drainage channels running across within a couple of blocks distance. The speed limit is 35 MPH, but even with most people slowing down to 15-20 the suspensions over-rebound... typical mushy OE shocks that lack adequate rebound damping.

So starting at the midway point of the adjustment range I traverse this road section at increasing speeds beginning at 15-25 MPH, and my objective is to ultimately hit them at the 35 MPH limit with the body rebounding only to normal ride height or a little above and with no vertical or pitching oscillation.

Don't be surprised if the front and rear end up at different settings. If you find these settings to firm for normal road use, then dial them back in one click increments until you're comfortable with the ride.

Duke

 

Steve, what year 911 do you have?

 

I have 2. A 91 turbo and a 14S.

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